Question 1

For an independent samples t test, the point estimate would be

Accepted Answer

A)   μ₁ - μ₂
B)   M₁ - M₂
C)   D" class="answers-bank-image d-inline" rel="preload" >
D)   MDE) B) and D)
F) C) and D)

Question 2

What is the relationship between level of confidence and the width of the confidence interval?

Accepted Answer

As the level of confidence inc...

Question 3

If we want to establish a 99% confidence interval for the population mean, then our interval would fail to capture μ _____ percent of the time.

Accepted Answer

A)   1
B)   10
C)   100
D)   .5E) A) and B)
F) None of the above

Question 4

Which is the correct formula for the upper limit of a confidence interval for a one-sample t test?

Accepted Answer

A)   M + t(sM) 
B)   μ + t(sM) 
C)   MD + t (sM
D)  
D)   μD + t (sM
D)  E) A) and D)
F) B) and C) A

Question 5

As compared to point estimates, confidence intervals are

Accepted Answer

A)   less specific but we can have greater confidence that they will include the population values.
B)   more specific and we have greater confidence that they will include the population values.
C)   less specific and we have less confidence that they will include the population values.
D)   more specific but we have less confidence that they will include the population values.E) None of the above
F) All of the above

Question 6

Given the scores 10, 12, 15, and 20, what is the point estimate for μ?

Accepted Answer

A)   57
B)   14.25
C)   19
D)   ±10E) A) and B)
F) A) and C)

Question 7

Which of the following is NOT true of confidence intervals?

Accepted Answer

A)   They take sampling error into consideration.
B)   They are expected to include a population parameter.
C)   They include a range of values.
D)   They are more specific than point estimates.E) C) and D)
F) B) and D)

Question 8

To determine the point estimate of a population parameter, use

Accepted Answer

A)   the obtained sample values with an adjustment for standard error.
B)   the denominator of the t test.
C)   the numerator of the t test.
D)   the appropriate confidence interval.E) All of the above
F) A) and B)

Question 9

If we have established a 99% confidence interval for μ of 40 to 60, what would be the correct interpretation?

Accepted Answer

A)   99% of sample means would fall between 40 and 60.
B)   99% of population means would fall between 40 and 60.
C)   We can be 99% confident that μ would be between 40 and 60.
D)   We can be 99% confident that M would be between 40 and 60.E) A) and B)
F) None of the above

Question 10

Which of the following components is not needed for calculating the lower and upper limits of a confidence interval?

Accepted Answer

A)   an obtained statistic
B)   a population parameter
C)   a t-value
D)   the estimated standard errorE) None of the above
F) A) and B)

Question 11

Based on the summary data below, construct a 95% confidence interval forμ.
M = 25
n = 12
SS = 200

Accepted Answer

The answer of Based on the summary data below, construct...

Question 12

If we wanted to estimate an 80% confidence interval for a two-sample repeated measures t test with a sample size of n = 23, what t values would we use?

Accepted Answer

A)   ±1.323
B)   ±1.721
C)   ±1.717
D)   ±1.321E) B) and C)
F) A) and B)

Question 13

A study was conducted to determine the effectiveness of interval training (alternating between walking and running at a fast pace)  on running speed. A sample of n = 9 runners improved their speed on 5K runs after the training by an average of MD = 1.58 minutes with sD = .61. The values for a 95% confidence interval for μD would be

Accepted Answer

A)   .20 to 3.18
B)   .17 to 2.99
C)   1.13 to 2.04
D)   .14 to 3.02E) A) and B)
F) A) and C)

Question 14

Based on the summary data below, construct a 98% confidence interval for μD.
MD = 8
n = 24
SSD = 893

Accepted Answer

α = .02
df = 23
t = ±2.5
   LL = 8 - (2.5)(1.27) = 4.82 and UL = 8 + (2.5)(1.27) = 11.18

Question 15

The scores before a treatment intervention were 10, 8, 11, 9, and 8. The scores after the intervention were 6, 5, 6, 3, and 5, respectively. What is the point estimate for μD?

Accepted Answer

Point esti...

Question 16

For a one-sample t test, the point estimate would be

Accepted Answer

A)   M
B)   μ
C)   MD
D)   μDE) B) and C)
F) A) and D)

Question 17

If we wanted to make a point estimate for μ₁ - μ₂, what statistic would we use?

Accepted Answer

The answer of If we wanted to make a point...

Question 18

Point estimates involve _______ values and are _______ specific than confidence intervals.

Accepted Answer

A)   a range of; less
B)   single; more
C)   a range of; more
D)   single; lessE) A) and B)
F) A) and C)

Question 19

Based on the summary data below, construct a 90% confidence interval for μ.
M = 50
n = 15
sM = 3

Accepted Answer

LL = 50 - (1.761)(3)...

Question 20

When the level of confidence is increased, the range of values ______ and becomes ________ specific.

Accepted Answer

A)   narrows; less
B)   narrows; more
C)   broadens; more
D)   broadens; lessE) A) and B)
F) A) and C) D

Exam 12: Confidence Interval Versus Point Estimation

For an independent samples t test, the point estimate would be

Correct Answer
verified

What is the relationship between level of confidence and the width of the confidence interval?

Correct Answer
verified
As the level of confidence inc...
View Answer

If we want to establish a 99% confidence interval for the population mean, then our interval would fail to capture μ _____ percent of the time.

Correct Answer
verified

Which is the correct formula for the upper limit of a confidence interval for a one-sample t test?

Correct Answer
verified
A

As compared to point estimates, confidence intervals are

Correct Answer
verified

Given the scores 10, 12, 15, and 20, what is the point estimate for μ?

Correct Answer
verified

Which of the following is NOT true of confidence intervals?

Correct Answer
verified

To determine the point estimate of a population parameter, use

Correct Answer
verified

If we have established a 99% confidence interval for μ of 40 to 60, what would be the correct interpretation?

Correct Answer
verified

Which of the following components is not needed for calculating the lower and upper limits of a confidence interval?

Correct Answer
verified

Based on the summary data below, construct a 95% confidence interval forμ. M = 25 n = 12 SS = 200

Correct Answer
verified

If we wanted to estimate an 80% confidence interval for a two-sample repeated measures t test with a sample size of n = 23, what t values would we use?

Correct Answer
verified

Correct Answer
verified

Based on the summary data below, construct a 98% confidence interval for μ_D. M_D = 8 n = 24 SS_D = 893

Correct Answer
verified
α = .02 df = 23 t = ±2.5 11edaba0_0a8f_b2ce_acc5_7f6ac1ff0123_TBR1558_00 11edaba0_0a8f_b2cf_acc5_4118fd9a9b09_TBR1558_00 LL = 8 - (2.5)(1.27) = 4.82 and UL = 8 + (2.5)(1.27) = 11.18

The scores before a treatment intervention were 10, 8, 11, 9, and 8. The scores after the intervention were 6, 5, 6, 3, and 5, respectively. What is the point estimate for μ_D?

Correct Answer
verified
Point esti...
View Answer

For a one-sample t test, the point estimate would be

Correct Answer
verified

If we wanted to make a point estimate for μ₁ - μ₂, what statistic would we use?

Correct Answer
verified

Point estimates involve _ values and are _ specific than confidence intervals.

Correct Answer
verified

Based on the summary data below, construct a 90% confidence interval for μ. M = 50 n = 15 s_M = 3

Correct Answer
verified
LL = 50 - (1.761)(3)...
View Answer

When the level of confidence is increased, the range of values and becomes __ specific.

Correct Answer
verified
D

Exam 12: Confidence Interval Versus Point Estimation

For an independent samples t test, the point estimate would be

Correct AnswerverifiedShow Answer

What is the relationship between level of confidence and the width of the confidence interval?

Correct AnswerverifiedAs the level of confidence inc...View AnswerShow Answer

If we want to establish a 99% confidence interval for the population mean, then our interval would fail to capture μ _____ percent of the time.

Correct AnswerverifiedShow Answer

Which is the correct formula for the upper limit of a confidence interval for a one-sample t test?

Correct AnswerverifiedA

As compared to point estimates, confidence intervals are

Correct AnswerverifiedShow Answer

Given the scores 10, 12, 15, and 20, what is the point estimate for μ?

Correct AnswerverifiedShow Answer

Which of the following is NOT true of confidence intervals?

Correct AnswerverifiedShow Answer

To determine the point estimate of a population parameter, use

Correct AnswerverifiedShow Answer

If we have established a 99% confidence interval for μ of 40 to 60, what would be the correct interpretation?

Correct AnswerverifiedShow Answer

Which of the following components is not needed for calculating the lower and upper limits of a confidence interval?

Correct AnswerverifiedShow Answer

Based on the summary data below, construct a 95% confidence interval forμ. M = 25 n = 12 SS = 200

Correct AnswerverifiedShow Answer

If we wanted to estimate an 80% confidence interval for a two-sample repeated measures t test with a sample size of n = 23, what t values would we use?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Based on the summary data below, construct a 98% confidence interval for μD. MD = 8 n = 24 SSD = 893

Correct Answerverifiedα = .02 df = 23 t = ±2.5 11edaba0_0a8f_b2ce_acc5_7f6ac1ff0123_TBR1558_00 11edaba0_0a8f_b2cf_acc5_4118fd9a9b09_TBR1558_00 LL = 8 - (2.5)(1.27) = 4.82 and UL = 8 + (2.5)(1.27) = 11.18

The scores before a treatment intervention were 10, 8, 11, 9, and 8. The scores after the intervention were 6, 5, 6, 3, and 5, respectively. What is the point estimate for μD?

Correct AnswerverifiedPoint esti...View AnswerShow Answer

For a one-sample t test, the point estimate would be

Correct AnswerverifiedShow Answer

If we wanted to make a point estimate for μ₁ - μ₂, what statistic would we use?

Correct AnswerverifiedShow Answer

Point estimates involve _______ values and are _______ specific than confidence intervals.

Correct AnswerverifiedShow Answer

Based on the summary data below, construct a 90% confidence interval for μ. M = 50 n = 15 sM = 3

Correct AnswerverifiedLL = 50 - (1.761)(3)...View AnswerShow Answer

When the level of confidence is increased, the range of values ______ and becomes ________ specific.

Correct AnswerverifiedD

Correct Answer
verified

Correct Answer
verified
As the level of confidence inc...
View Answer

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Based on the summary data below, construct a 98% confidence interval for μ_D. M_D = 8 n = 24 SS_D = 893

Correct Answer
verified
α = .02 df = 23 t = ±2.5 11edaba0_0a8f_b2ce_acc5_7f6ac1ff0123_TBR1558_00 11edaba0_0a8f_b2cf_acc5_4118fd9a9b09_TBR1558_00 LL = 8 - (2.5)(1.27) = 4.82 and UL = 8 + (2.5)(1.27) = 11.18

The scores before a treatment intervention were 10, 8, 11, 9, and 8. The scores after the intervention were 6, 5, 6, 3, and 5, respectively. What is the point estimate for μ_D?

Correct Answer
verified
Point esti...
View Answer

Correct Answer
verified

Correct Answer
verified

Point estimates involve _ values and are _ specific than confidence intervals.

Correct Answer
verified

Based on the summary data below, construct a 90% confidence interval for μ. M = 50 n = 15 s_M = 3

Correct Answer
verified
LL = 50 - (1.761)(3)...
View Answer

When the level of confidence is increased, the range of values and becomes __ specific.

Correct Answer
verified
D