Question 1

Test the hypothesis that  =  . Two samples are randomly selected from normal populations. The sample statistics are given below. Use α = 0.05.

Accepted Answer

The answer of Test the hypothesis that  = ...

Question 2

Data sets A and B are dependent. Find  .  Assume that the paired data came from a population that is normally distributed.

Accepted Answer

A)  5.6 
B)  8.9 
C)  7.8 
D)  6.8

Question 3

Test the hypothesis that  ≠  . Two samples are randomly selected from normal populations. The sample statistics are given below. Use α = 0.01.

Accepted Answer

The answer of Test the hypothesis that  ≠ ...

Question 4

Perform the appropriate hypothesis test.
-A random sample of  individuals results in  successes. An independent sample of  individuals results in  successes. Does this represent sufficient evidence to conclude that  at the α = 0.05 level of significance?

Accepted Answer

The answer of Perform the appropriate hypothesis test.
-A random sample...

Question 5

Construct a 98% confidence interval for  -  . The sample statistics listed below are from independent samples.Sample statistics:  = 1000,  = 250, and  = 1200,  = 195

Accepted Answer

A)  (0.581, 1.819) 
B)  (-0.621, 0.781) 
C)  (0.047, 0.128) 
D)  (1.516, 3.021)

Exam 11: Inference on Two Samples

Test the hypothesis that = . Two samples are randomly selected from normal populations. The sample statistics are given below. Use α = 0.05.

Data sets A and B are dependent. Find . Assume that the paired data came from a population that is normally distributed.

Test the hypothesis that ≠ . Two samples are randomly selected from normal populations. The sample statistics are given below. Use α = 0.01.

Perform the appropriate hypothesis test. -A random sample of individuals results in successes. An independent sample of individuals results in successes. Does this represent sufficient evidence to conclude that at the α = 0.05 level of significance?

Construct a 98% confidence interval for - . The sample statistics listed below are from independent samples.Sample statistics: = 1000, = 250, and = 1200, = 195