1. Two separate samples, each with n = 14 individuals, receive different treatments. After treatment, the first sample has SS = 1222 and the second has SS = 1620. Find the pooled Variance for two independent samples. (hundredths place)

Type only the pooled variance.

2. Find the estimated standard error for the sample mean for n = 16 and SS = 3520. Nearest hundredths place.

3. The researcher recorded the amount of time each bird spent in the plain chamber during a 60-minute session. Suppose the study produced a mean of M = 59.52 minutes on the plain chamber with SS = 3931 for a sample of n = 14 birds. Construct the 90% confidence interval to estimate the mean amount of time spent on the plain side for the population of birds.

Type only the upper interval by using

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=58, SS1=2300

For counting Paper: n2 =10, M2=60, SS2=2351

Please type the test statistics only in nearest hundredths place.

5. For a population with a mean of = 55 and a standard deviation of = 22, what is the standard error of the distribution of sample means for a sample size of n=21? leave the answer to the nearest hundredths place.

6.Find the t values that form the boundaries of the critical region for a two-tailed test with = 0.10 for a sample size of

sample 1 is 10 and sample 2 is 11.

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

n1=12, n2=5, t= 3.35 and significant level is 0.02.

A. keep the null hypothesis

B. Fail to Reject Null Hypothesis

C. Reject Null Hypothesis

D. Unable to determine

8. College Professors have incomes with a standard deviation that is less 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.

For help please click the links below!

A. Right Tail (one)

B. Left Tail (one)

C. Two tailed

D. In between

9. For a population with a mean of = 30 and a standard deviation of = 14, find the z-score corresponding to M = 26 for a sample of n = 4 scores.