QUESTION 1

1. What are the lower Confidence Interval for a random sample of 144, mean of 91, standard deviation of 43.68, and confidence level of 0.87?

Use two decimal pointsfor all questions in this test unless a specific question asks for something different.

QUESTION 2

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

QUESTION 3

1. The claim is a mean is88and you want to prove it is less.Test the hypothesis using an alpha of0.05.Your sample of15had a mean of83.6and standard deviation of15.84.Select the correct hypothesis statement below.

H0is less than83.6

H1is morethan83.6

H0is morethan83.6

H1is lessthan83.6

H0is less than88

H1is morethan88

H0is morethan88

H1is lessthan88

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.

Calculate theCriticalDecisionRule.

QUESTION 5

1. The claim is a mean is 212 and you want to prove it is more.Test the hypothesis within a 10% level of significance.Your sample of 59 had a mean of 214.12 and standard deviation of 63.6.

Calculate the Test Statistic.

QUESTION 6

The claim for a marketing campaign is that 0.26 clients respond, and you want to prove it is less.Your survey of 264 clients showed 66 respond. Test the hypothesis at a 1 % level of significance.

If the decision rule is -2.33 and the test statisticis -0.37, 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 11

1. Calculate the standard deviation forsales per storeusing this sample data

74,49,4,33,82,76

QUESTION 12

1. Using the Empirical Rule, in a normal distribution what percentage of values would fall into an interval of 63.9 to 116.1 where the mean is 90 and standard deviation is 26.1? Please format to 3 decimal places.

QUESTION 13

1. What is the lower outlier if Q1 is 26 and Q3 is 157?

QUESTION 14

1. Calculate the 70thpercentile for the data below.

74, 49,4, 33, 82, 76, 0,6, 34

QUESTION 19

1. What is the Normal Distribution Probability where X is less than 80.6 for a mean of 61, and standard deviation of 10.37

1 points

QUESTION 20

1. What is the Central Limit Probability where x is more than 515 for a population mean of 494, and standard deviation of 222.3 where the sample size is 39?

1 points

QUESTION 21

1. What is the Discrete Standard Deviation when sample size is 68 with a probability of 0.25?

1 points

QUESTION 22

1. What is the Binomial Probability when the number of trials is 6, probability is 0.34, and we want exactly 2 successes. Use 4 decimal places.

1 points

QUESTION 24

1. In a right-skewed distribution?

the mean is equal tothe median.

the mean is more than the median.

the mean is less than the median.

none of the above.

QUESTION 25

1. If you can play soccer or play chess, but you cannot play both at the same time. This concept is called

a.mutually exclusive

b.dependent

c.permutation

dpersnickety