Math 221 – quizzes – week 5 homework

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Question 1

From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 21.69 with a standard deviation of 3.54. What is the 95% confidence interval for the amount of time spent on administrative issues?

(19.24, 24.14)

(20.71, 22.67)

(20.93, 22.46)

(21.78, 22.60)

Question 2

If a confidence interval is given from 43.8 up to 62.0 and the mean is known to be 52.9, what is the maximum error?

9.1

43.8

18.2

4.6

Question 3

If a shirt manufacturer wanted to make shirts that fit most individuals, what characteristics would be better?

wide confidence interval so shirts fit few individuals

wide confidence interval so shirts fit most individuals

narrow confidence interval so shirts fit most individuals

narrow confidence interval so shirts fit few individuals

Question 4

Which of the following are most likely to lead to a wide confidence interval?

large sample size

large mean

small sample size

small standard deviation

Question 5

If you were designing a study that would benefit from data points with high values, you would want the input variable to have:

a large maximum error

a large sample size

a large standard deviation

a large mean

Question 6

The 95% confidence interval for these parts is 56.98 to 57.05 under normal operations. A systematic sample is taken from the manufacturing line to determine if the production process is still within acceptable levels. The mean of the sample is 57.04. What should be done about the production line?

Stop the line as it is close to the confidence interval

Keep the line operating as it is close to the confidence interval

Keep the line operating as it is outside the confidence interval

Stop the line as it is outside the confidence interval

Question 7

In a sample of 65 temperature readings taken from the freezer of a restaurant, the mean is 31.9 degrees and the standard deviation is 2.7 degrees. What would be the 80% confidence interval for the temperatures in the freezer?

(31.36, 31.90)

(31.47, 32.33)

(29.20, 34.61)

(26.59, 37.38)

Question 8

What is the 99% confidence interval for a sample of 36 seat belts that have a mean length of 85.6 inches long and a standard deviation of 2.5 inches?

(84.5, 86.7)

(84.4, 86.8)

(83.1, 88.1)

(80.6, 90.6)

Question 9

If two samples A and B had the same mean and standard deviation, but sample B had a larger standard deviation, which sample would have the wider 95% confidence interval?

Sample A as it has the smaller sample

Sample B as its sample is more disperse

Sample A as its sample is more disperse

Sample B as it has the smaller sample

Question 10

Why might a company use a lower confidence interval, such as 80%, rather than a high confidence interval, such as 99%?

They make children’s toys where imprecision is expected

They track the migration of fish where accuracy is not as important

They are in the medical field, so cannot be so precise

They make computer parts where they are too small for higher accuracy

Question 11

Determine the minimum sample size required when you want to be 95% confident that the sample mean is within one unit of the population mean. Assume a standard deviation of 4.3 in a normally distributed population.

Question 12

Determine the minimum sample size required when you want to be 99% confident that the sample mean is within 0.50 units of the population mean. Assume a standard deviation of 1.4 in a normally distributed population.

Question 13

In a sample of 10 CEOs, they spent an average of 12.9 hours each week looking into new product opportunities with a standard deviation of 3.8 hours. Find the 95% confidence interval.

(9.1, 16.7)

(10.5, 15.3)

(11.1, 14.7)

(10.2, 15.6)

Question 14

In a sample of 18 kids, their mean time on the internet on the phone was 28.6 hours with a sample standard deviation of 5.6 hours. Which distribution would be most appropriate to use?

z distribution as the sample standard deviation always represents the population

z distribution as the population standard deviation is known while the times are assumed to be normally distributed

t distribution as the population standard deviation is unknown while the times are assumed to be normally distributed

t distribution as the sample standard deviation is unknown

Question 15

Under a time crunch, you only have time to take a sample of 10 water bottles and measure their contents. The sample had a mean of 20.05 ounces with a standard deviation of 0.3 ounces. What would be the 90% confidence interval?

(19.75, 20.35)

(19.92, 20.18)

(19.89, 20.21)

(19.88, 20.22)

Question 16

Say that a supplier claims they are 99% confident that their products will be in the interval of 50.02 to 50.38. You take samples and find that the 99% confidence interval of what they are sending is 50.04 to 50.40. What conclusion can be made?

The supplier products have a higher mean than claimed

The supplier is less accurate than they claimed

The supplier products have a lower mean than claimed

The supplier is more accurate than they claimed

Question 17

Market research indicates that a new product has the potential to make the company an additional $1.6 million, with a standard deviation of $2.0 million. If this estimate was based on a sample of 8 customers, what would be the 95% confidence interval?

(0.21, 3.00)

(0.00, 3.27)

(-0.40, 3.60)

(-0.07, 3.27)

Question 18

In a sample of 28 cups of coffee at the local coffee shop, the average temperature was 162.5 degrees with a standard deviation of 14.1 degrees. What would be the 95% confidence interval for the temperature of your cup of coffee?

(157.96, 167.04)

(157.03, 167.97)

(148.40, 176.60)

(158.12, 166.88)

Question 19

In a situation where the sample size from a normally distributed data set was decreased from 45 to 22, what would be the impact on the confidence interval?

It would become narrower due to using the z distribution

It would become narrower with fewer values

It would become wider due to using the t distribution

It would remain the same as the sample size does not impact confidence intervals

Question 20

You needed a supplier that could provide parts as close to 76.8 inches in length as possible. You receive four contracts, each with a promised level of accuracy in the parts supplied. Which of these four would you be most likely to accept?

Mean of 76.8 with a 99% confidence interval of 76.6 to 77.0

Mean of 76.8 with a 95% confidence interval of 76.6 to 77.0

Mean of 76.800 with a 90% confidence interval of 76.6 to 77.0

Mean of 76.800 with a 99% confidence interval of 76.5 to 77.1

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July 1, 2023

Research the role of the Chief Information Security Officer (CISO) to find answers to the following questions:

1. What is the role of the CISO in an organization?

2. What types of knowledge, skills, and abilities are most important for a successful CISO to have?

3. How can a CISO contribute to making security a priority during the system development life cycle (SDLC)? (Provide specific examples for two or more phases of the SDLC.)

Write a plain English summary of your research making sure that you provide a detailed answer for each question along with appropriate examples.

Your response must be 150+ words in length and contain APA format in-text citations and references.

Suggested Resource:

Brenner, B. (2010, November 2). The New CISO: How the role has changed in 5 years. CISO. Retrieved from http://www.csoonline.com/article/print/632223

Business Continuity Planning (BCP) is a critical business process which requires the participation of managers from all parts of the enterprise. The CISO and CISO staff members should be key players on the BCP team. In this learning activity you will learn more about the BCP process and then answer questions about CISO participation on this team.

Watch three Federal Emergency Management Agency (FEMA) videos on the importance of Business Continuity Planning (BCP). Follow these instructions to access the videos:

1. Open the READY.GOV Web site: http://www.ready.gov/business-continuity-planning-suite

2. Scroll down to the tabs and read the content under the tab labeled "Learn about the tools"

3. Click on the tab labeled "Business Continuity Video Training."

4. Click on and watch the first three videos on the Web page:

(a) Business Continuity Training - Introduction,

(b) Business Continuity Training - Part One What is Business Continuity Planning?

(c) Business Continuity Training - Part Two Why is Business Continuity Planning Important?

If you cannot view the videos, read the transcripts which are posted below this discussion question.

After you have watched the videos (or read the transcripts), reflect upon the relationship between business continuity planning and the overarching security requirements to protect the confidentiality, integrity, and availability of information and information systems EVEN DURING A DISASTER. Write a plain English explanation of this relationship. In your explanation, address the following:

Identify and discuss three reasons (from the videos) as to why business continuity planning is important to an organization's overall information systems security program.
Identify and discuss the harm that could occur if a business is not prepared to respond to a disaster which prevents restoration of business operations at the original site within 72 hours (3 days) -- the standard time criteria for invocation of a business continuity plan after a disaster has occurred.
How can the CISO and CISO staff members help to ensure that the BCP process appropriately addresses information systems security issues?

Post your explanation as a response to this discussion question.

Your response should be 150+ words and include APA format in-text citations and references.

Please let me know if you will be able to do it. It is due on friday, thanks

July 1, 2023

Research the role of the Chief Information Security Officer (CISO) to find answers to the following questions:

1. What is the role of the CISO in an organization?

2. What types of knowledge, skills, and abilities are most important for a successful CISO to have?

3. How can a CISO contribute to making security a priority during the system development life cycle (SDLC)? (Provide specific examples for two or more phases of the SDLC.)

Write a plain English summary of your research making sure that you provide a detailed answer for each question along with appropriate examples.

Your response must be 150+ words in length and contain APA format in-text citations and references.

Suggested Resource:

Brenner, B. (2010, November 2). The New CISO: How the role has changed in 5 years. CISO. Retrieved from http://www.csoonline.com/article/print/632223

Watch three Federal Emergency Management Agency (FEMA) videos on the importance of Business Continuity Planning (BCP). Follow these instructions to access the videos:

1. Open the READY.GOV Web site: http://www.ready.gov/business-continuity-planning-suite

2. Scroll down to the tabs and read the content under the tab labeled "Learn about the tools"

3. Click on the tab labeled "Business Continuity Video Training."

4. Click on and watch the first three videos on the Web page:

(a) Business Continuity Training - Introduction,

(b) Business Continuity Training - Part One What is Business Continuity Planning?

(c) Business Continuity Training - Part Two Why is Business Continuity Planning Important?

If you cannot view the videos, read the transcripts which are posted below this discussion question.

Identify and discuss three reasons (from the videos) as to why business continuity planning is important to an organization's overall information systems security program.
Identify and discuss the harm that could occur if a business is not prepared to respond to a disaster which prevents restoration of business operations at the original site within 72 hours (3 days) -- the standard time criteria for invocation of a business continuity plan after a disaster has occurred.
How can the CISO and CISO staff members help to ensure that the BCP process appropriately addresses information systems security issues?

Post your explanation as a response to this discussion question.

Your response should be 150+ words and include APA format in-text citations and references.

Please let me know if you will be able to do it. It is due on friday, thanks

July 1, 2023

Research the role of the Chief Information Security Officer (CISO) to find answers to the following questions:

1. What is the role of the CISO in an organization?

2. What types of knowledge, skills, and abilities are most important for a successful CISO to have?

3. How can a CISO contribute to making security a priority during the system development life cycle (SDLC)? (Provide specific examples for two or more phases of the SDLC.)

Write a plain English summary of your research making sure that you provide a detailed answer for each question along with appropriate examples.

Your response must be 150+ words in length and contain APA format in-text citations and references.

Suggested Resource:

Brenner, B. (2010, November 2). The New CISO: How the role has changed in 5 years. CISO. Retrieved from http://www.csoonline.com/article/print/632223

Watch three Federal Emergency Management Agency (FEMA) videos on the importance of Business Continuity Planning (BCP). Follow these instructions to access the videos:

1. Open the READY.GOV Web site: http://www.ready.gov/business-continuity-planning-suite

2. Scroll down to the tabs and read the content under the tab labeled "Learn about the tools"

3. Click on the tab labeled "Business Continuity Video Training."

4. Click on and watch the first three videos on the Web page:

(a) Business Continuity Training - Introduction,

(b) Business Continuity Training - Part One What is Business Continuity Planning?

(c) Business Continuity Training - Part Two Why is Business Continuity Planning Important?

If you cannot view the videos, read the transcripts which are posted below this discussion question.

Identify and discuss three reasons (from the videos) as to why business continuity planning is important to an organization's overall information systems security program.
Identify and discuss the harm that could occur if a business is not prepared to respond to a disaster which prevents restoration of business operations at the original site within 72 hours (3 days) -- the standard time criteria for invocation of a business continuity plan after a disaster has occurred.
How can the CISO and CISO staff members help to ensure that the BCP process appropriately addresses information systems security issues?

Post your explanation as a response to this discussion question.

Your response should be 150+ words and include APA format in-text citations and references.

Please let me know if you will be able to do it. It is due on friday, thanks

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Math 221 – quizzes – week 5 homework

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