2. Null Hypothesis is always equal.

A. TRUE

B. FALSE

3. Find the estimated standard error for the sample mean for n = 13 and SS = 3503. Nearest hundredths place.

4. In an experiment, a group of college students was told that they were participating in a manual skill study. Half of the students were given a stack of money to count and the other half got a stack of blank pieces of paper. After the counting task, the participants were asked to dip their hands into bowls of very hot water (122F) and rate how uncomfortable it was. Given the following data; Find the Test statistics for two independent samples.

For counting Money: n1=10, M1=51, SS1=2300

For counting Paper: n2 =10, M2=60, SS2=2353

Please type the test statistics only in nearest hundredths place.

6. For a population with a mean of = 29 and a standard deviation of = 11, find the z-score corresponding to M = 26 for a sample of n = 4 scores. Round your answer to the nearest hundredths

8. Given the sample size for two independent sample, test statistics and significant level, choose the correct decision;

n1=12, n2=5, t= -2.35 and significant level is 0.02.

A. Do not keep the null hypothesis

B. Fail to reject the null hypothesis

C. Unable to determine

D. Reject the null hypothesis

9. Hypothesis is always correct!

A. True

B. False

10. In an experiment, a group of college students was told that they were participating in a manual skill study. Half of the students were given a stack of money to count and the other half got a stack of blank pieces of paper. After the counting task, the participants were asked to dip their hands into bowls of very hot water (122F) and rate how uncomfortable it was. Given the following data; Find the estimated error of the mean only.

For counting Money: n1=10, M1=365, SS1=365

For counting Paper: n2 =10, M2=60, SS2=251

Please type the estimated error of the mean only in nearest hundredths place.

12. Two separate samples, each with n = 14 individuals, receive different treatments. After treatment, the first sample has SS1 = 1378 and the second has SS2 = 1620. Find the pooled Variance for two independent samples. (hundredths place)

Type only the pooled variance.

13. College Professors have incomes with a standard deviation that is more than $21,000. A recent study of 225 College Professors income showed a standard deviation of $24,750. State whether it is one tail or two tails.

A. Two tailed

B. Left Tail (one)

C. In between

D. Right Tail (one)

14. For a population with a mean of = 55 and a standard deviation of = 93, what is the standard error of the distribution of sample means for a sample size of n=7?

leave the answer to the nearest hundredths place.