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

test statistic ≈ -0.954; 0.30

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 
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

test statistic ≈ -1.546; 0.10

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

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

Data Collection

Organizing and Summarizing Data

Numerically Summarizing Data

Describing the Relation Between Two Variables

Probability

Discrete Probability Distributions

The Normal Probability Distributions

Sampling Distributions

Estimating the Value of a Parameter Using Confidence Intervals

Hypothesis Tests Regarding a Parameter

Inference on Categorical Data

Comparing Three or More Means

Inference of the Least-Squares Regression Model

Filters

Exam 11: Inference on Two Samples