QUESTION 2

1. What are the lower Confidence Interval for a random sample of 124, mean of 31, standard deviation of 11.47, and confidence level of 0.96?
2. Use two decimal pointsfor all questions in this test unless a specific question asks for something different.

QUESTION 3

1. What is the Sample Size given standard deviation is 9.12, error is within 2.55, and confidence level is 0.89 ?

QUESTION 4

1. The claim is a mean is 98 and you want to prove it is less. Test the hypothesis using an alpha of 0.1.Your sample of 23 had a mean of 97.02 and standard deviation of 10.78.Select the correct hypothesis statement below
2. H0is less than98

H1is more than 98

1. H0is morethan98

H1is lessthan98

1. H0is less than97.02

H1is more than 97.02

1. H0is morethan97.02

H1is lessthan97.02

QUESTION 5

1. The claim for a marketing campaign is that 0.39 clients respond, and you want to prove it is more.Your survey of 296 clients showed 85 respond. Test the hypothesis at a 10 % level of significance.

Calculate the Critical Decision Rule.

QUESTION 6

1. The claim is a mean is 239 and you want to prove it is more.Test the hypothesis within a 5% level of significance.Your sample of 142 had a mean of 253.34 and standard deviation of 76.48.
2. Calculate the Test Statistic.

QUESTION 7

1. The claim is a mean is 98 and you want to prove it is less. Test the hypothesis using an alpha of 0.1.Your sample of 23 had a mean of 97.02 and standard deviation of 10.78.

If the decision rule is -1.32 and the test statisticis -0.44, what is the correct answer below?

Reject the null hypothesis

Do not reject the null hypothesis

Accept the null hypothesis

Accept the alternative hypothesis

QUESTION 23

1. What is the Binomial Probability when the number of trials is 9, probability is 0.65, and we want less than 2 successes. Use 4 decimal places.

QUESTION 25

1. In a distribution without any skew?

the median is approximatelyequal to the mean.

the median is less than the mean.

the median is larger than the mean.

none of the above.

QUESTION 26

1. If you can play soccer as the first event, which does NOTalter the probability that you playchess as the second event,this concept is called

mutually exclusive

dependent

permutation

independent