QNT 275 Week 4 Connect Knowledge

- The sampling distribution of a sample statistic is the probability distribution of the population of all possible values of the sample statistic.

True

False

A recent study conducted by the state government attempts to determine whether the voting public supports a further increase in cigarette taxes. The opinion poll recently sampled 1,500 voting age citizens. 1,020 of the sampled citizens were in favor of an increase in cigarette taxes. The state government would like to decide if there is enough evidence to establish whether the proportion of citizens supporting an increase in cigarette taxes is significantly greater than .66. What is the alternative hypothesis?

*p* ≤ .66

*p* > .66

*p* = .66

*p* < .66

- If
*p*= .8 and*n*= 50, then we can conclude that the sampling distribution of is approximately a normal distribution.

True

False

- It has been reported that the average time to download the home page from a government website was 0.9 seconds. Suppose that the download times were normally distributed with a standard deviation of 0.3 seconds. If random samples of 23 download times are selected, describe the shape of the sampling distribution and how it was determined.

normal; the original population is normal

normal; size of sample meets the Central Limit Theorem requirement

cannot be determined with the information that is given

skewed; the original population is not a normal distribution

- According to the Central Limit Theorem, if a sample size is at least _____, then for most sampled populations, we can conclude that the sample means are approximately normal.

20

30

25

50

- The null hypothesis is a statement that will be accepted only if there is convincing sample evidence that it is true.

True

False

- A(n) _____________ hypothesis is the statement that is being tested. It usually represents the status quo, and it is not rejected unless there is convincing sample evidence that it is false.

alternative

null

true

research

- As the sample size increases, the standard deviation of the sampling distribution increases.

True

False

- In the upcoming election for governor, the most recent poll, based on 900 respondents, predicts that the incumbent will be reelected with 55 percent of the votes. From the 900 respondents, how many indicated that they would not vote for the current governor or indicated that they were undecided?

400

495

405

450

- If we have a sample size of 100 and the estimate of the population proportion is .10, we can estimate the sampling distribution of with a normal distribution.

True

False

- It has been reported that the average time to download the home page from a government website was 0.9 seconds. Suppose that the download times were normally distributed with a standard deviation of 0.3 seconds. If random samples of 36 download times are selected, calculate the mean of the sampling distribution of the sampling mean.

0.9

0.15

0.05

0.3

- Based on a random sample of 25 units of product X, the average weight is 102 lb and the sample standard deviation is 10 lb. We would like to decide if there is enough evidence to establish that the average weight for the population of product X is greater than 100 lb. Therefore, the alternative hypothesis can be written as
*H*:_{A}*μ*> 100. (Assume the population is normally distributed.)

True

False

QNT 275 Week 4 Connect Knowledge

- The sampling distribution of a sample statistic is the probability distribution of the population of all possible values of the sample statistic.

True

False

A recent study conducted by the state government attempts to determine whether the voting public supports a further increase in cigarette taxes. The opinion poll recently sampled 1,500 voting age citizens. 1,020 of the sampled citizens were in favor of an increase in cigarette taxes. The state government would like to decide if there is enough evidence to establish whether the proportion of citizens supporting an increase in cigarette taxes is significantly greater than .66. What is the alternative hypothesis?

*p* ≤ .66

*p* > .66

*p* = .66

*p* < .66

- If
*p*= .8 and*n*= 50, then we can conclude that the sampling distribution of is approximately a normal distribution.

True

False

- It has been reported that the average time to download the home page from a government website was 0.9 seconds. Suppose that the download times were normally distributed with a standard deviation of 0.3 seconds. If random samples of 23 download times are selected, describe the shape of the sampling distribution and how it was determined.

normal; the original population is normal

normal; size of sample meets the Central Limit Theorem requirement

cannot be determined with the information that is given

skewed; the original population is not a normal distribution

- According to the Central Limit Theorem, if a sample size is at least _____, then for most sampled populations, we can conclude that the sample means are approximately normal.

20

30

25

50

- The null hypothesis is a statement that will be accepted only if there is convincing sample evidence that it is true.

True

False

- A(n) _____________ hypothesis is the statement that is being tested. It usually represents the status quo, and it is not rejected unless there is convincing sample evidence that it is false.

alternative

null

true

research

- As the sample size increases, the standard deviation of the sampling distribution increases.

True

False

- In the upcoming election for governor, the most recent poll, based on 900 respondents, predicts that the incumbent will be reelected with 55 percent of the votes. From the 900 respondents, how many indicated that they would not vote for the current governor or indicated that they were undecided?

400

495

405

450

- If we have a sample size of 100 and the estimate of the population proportion is .10, we can estimate the sampling distribution of with a normal distribution.

True

False

- It has been reported that the average time to download the home page from a government website was 0.9 seconds. Suppose that the download times were normally distributed with a standard deviation of 0.3 seconds. If random samples of 36 download times are selected, calculate the mean of the sampling distribution of the sampling mean.

0.9

0.15

0.05

0.3

- Based on a random sample of 25 units of product X, the average weight is 102 lb and the sample standard deviation is 10 lb. We would like to decide if there is enough evidence to establish that the average weight for the population of product X is greater than 100 lb. Therefore, the alternative hypothesis can be written as
*H*:_{A}*μ*> 100. (Assume the population is normally distributed.)

True

False

QNT 275 Week 4 Connect Knowledge

- The sampling distribution of a sample statistic is the probability distribution of the population of all possible values of the sample statistic.

True

False

A recent study conducted by the state government attempts to determine whether the voting public supports a further increase in cigarette taxes. The opinion poll recently sampled 1,500 voting age citizens. 1,020 of the sampled citizens were in favor of an increase in cigarette taxes. The state government would like to decide if there is enough evidence to establish whether the proportion of citizens supporting an increase in cigarette taxes is significantly greater than .66. What is the alternative hypothesis?

*p* ≤ .66

*p* > .66

*p* = .66

*p* < .66

- If
*p*= .8 and*n*= 50, then we can conclude that the sampling distribution of is approximately a normal distribution.

True

False

- It has been reported that the average time to download the home page from a government website was 0.9 seconds. Suppose that the download times were normally distributed with a standard deviation of 0.3 seconds. If random samples of 23 download times are selected, describe the shape of the sampling distribution and how it was determined.

normal; the original population is normal

normal; size of sample meets the Central Limit Theorem requirement

cannot be determined with the information that is given

skewed; the original population is not a normal distribution

- According to the Central Limit Theorem, if a sample size is at least _____, then for most sampled populations, we can conclude that the sample means are approximately normal.

20

30

25

50

- The null hypothesis is a statement that will be accepted only if there is convincing sample evidence that it is true.

True

False

- A(n) _____________ hypothesis is the statement that is being tested. It usually represents the status quo, and it is not rejected unless there is convincing sample evidence that it is false.

alternative

null

true

research

- As the sample size increases, the standard deviation of the sampling distribution increases.

True

False

- In the upcoming election for governor, the most recent poll, based on 900 respondents, predicts that the incumbent will be reelected with 55 percent of the votes. From the 900 respondents, how many indicated that they would not vote for the current governor or indicated that they were undecided?

400

495

405

450

- If we have a sample size of 100 and the estimate of the population proportion is .10, we can estimate the sampling distribution of with a normal distribution.

True

False

- It has been reported that the average time to download the home page from a government website was 0.9 seconds. Suppose that the download times were normally distributed with a standard deviation of 0.3 seconds. If random samples of 36 download times are selected, calculate the mean of the sampling distribution of the sampling mean.

0.9

0.15

0.05

0.3

- Based on a random sample of 25 units of product X, the average weight is 102 lb and the sample standard deviation is 10 lb. We would like to decide if there is enough evidence to establish that the average weight for the population of product X is greater than 100 lb. Therefore, the alternative hypothesis can be written as
*H*:_{A}*μ*> 100. (Assume the population is normally distributed.)

True

False

QNT 275 Week 4 Connect Knowledge

QNT 275 Week 4 Connect Knowledge

True

True

False

False

*p* ≤ .66

*p* ≤ .66*p*p ≤ .66

*p* > .66

*p* > .66*p*p > .66

*p* = .66

*p* = .66*p*p = .66

*p* < .66

*p* < .66*p*p < .66

- If
*p*= .8 and*n*= 50, then we can conclude that the sampling distribution of is approximately a normal distribution.

*p*= .8 and

*n*= 50, then we can conclude that the sampling distribution of is approximately a normal distribution.

If *p* = .8 and *n* = 50, then we can conclude that the sampling distribution of is approximately a normal distribution.If *p* = .8 and *n* = 50, then we can conclude that the sampling distribution of *p**n* is approximately a normal distribution.

True

True

False

False

normal; the original population is normal

normal; the original population is normal

normal; size of sample meets the Central Limit Theorem requirement

normal; size of sample meets the Central Limit Theorem requirement

cannot be determined with the information that is given

cannot be determined with the information that is given

skewed; the original population is not a normal distribution

skewed; the original population is not a normal distribution

20

20

30

30

25

25

50

50

True

True

False

False

alternative

alternative

null

null

true

true

research

research

- As the sample size increases, the standard deviation of the sampling distribution increases.

As the sample size increases, the standard deviation of the sampling distribution increases.

True

True

False

False

400

400

495

495

405

405

450

450

If we have a sample size of 100 and the estimate of the population proportion is .10, we can estimate the sampling distribution of with a normal distribution.If we have a sample size of 100 and the estimate of the population proportion is .10, we can estimate the sampling distribution of with a normal distribution.

True

True

False

False

0.9

0.9

0.15

0.15

0.05

0.05

0.3

0.3

- Based on a random sample of 25 units of product X, the average weight is 102 lb and the sample standard deviation is 10 lb. We would like to decide if there is enough evidence to establish that the average weight for the population of product X is greater than 100 lb. Therefore, the alternative hypothesis can be written as
*H*:_{A}*μ*> 100. (Assume the population is normally distributed.)

*H*:

_{A}*μ*> 100. (Assume the population is normally distributed.)

Based on a random sample of 25 units of product X, the average weight is 102 lb and the sample standard deviation is 10 lb. We would like to decide if there is enough evidence to establish that the average weight for the population of product X is greater than 100 lb. Therefore, the alternative hypothesis can be written as *H _{A}*:

*μ*> 100. (Assume the population is normally distributed.)

*H*

_{A}_{A}

*μ*

True

True

False

False