Question

Is my answer correct? Stats HW.

Answer 1

A personnel manager of a large insurance company wishes to evaluate the effectiveness of four different sales-training programs designed for new employees. A group of 36 recently hired college graduates are randomly assigned to the four programs with 9 employees in each program. At the end of the month long training program, a standard text is administered to the 36 employees. The scores were: Program A had a mean of 81 and a standard deviation of 10; Program B had a mean of 68 and a standard deviation of 9; Program C had a mean of 77 and a standard deviation of 9; Program D had a mean of 84 and a standard deviation of 7. What are your hypotheses? Which groups are statistically significant from which groups?
Hypothesis: These 4 groups are all statistically about equivalent. h0=ProgramA=ProgramB=ProgramC=ProgramD
h1=One of them is not equal
95% confidence interval:
ProgramA=64.816>=x>=92.184
ProgramB=61.082>=x>=74.918
ProgramC=70.082>=x>=83.918
ProgramD=77.851>=x>=90.149
Hypothesis is correct they are all statistically significant to each other.