Help me study for my Statistics class. I’m stuck and don’t understand.

Hello,

This course uses statistics to understand psychologically behaviors. I have someone who understand statistics very well and has a background in psychology.

Also, I want a written solution included. In other words, I want step by step instructions on how you solved each questions .

Good luck!!

1.How can you decrease the denominator of the t-test?

3. Last fall, a sample of N = 20 freshmen was selected to participate in a new 4-hour training program designed to improve study skills. To evaluate the effectiveness of the new program, the sample was compared with the rest of the freshmen class. All freshmen must take the English Language Skills course, and the mean score on the final exam for the entire freshmen class was μ = 81.75. The students in the new program had a mean score of M = 83.54 with a standard deviation of SD = 12.82. Test if the study skills training program produced a significant difference in scores using a two-tailed test with an α = .01.

Which is the appropriate analysis for this data?

Hint: A z-test is used when σ is known, and a t-test is used when σ is unknown.

Question 4

Last fall, a sample of N = 20 freshmen was selected to participate in a new 4-hour training program designed to improve study skills. To evaluate the effectiveness of the new program, the sample was compared with the rest of the freshmen class. All freshmen must take the English Language Skills course, and the mean score on the final exam for the entire freshmen class was μ = 81.75. The students in the new program had a mean score of M = 83.54 with a standard deviation of SD = 12.82. Test if the study skills training program produced a significant difference in scores using a two-tailed test with an α = .01.

What is the symbolic null hypothesis (H0)?

Hint: This is a two-tailed test, so the null (H0) and research (H1) hypotheses are not directional.

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81.75

μ

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81.75

μ

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81.75

Last fall, a sample of N = 20 freshmen was selected to participate in a new 4-hour training program designed to improve study skills. To evaluate the effectiveness of the new program, the sample was compared with the rest of the freshmen class. All freshmen must take the English Language Skills course, and the mean score on the final exam for the entire freshmen class was μ = 81.75. The students in the new program had a mean score of M = 83.54 with a standard deviation of SD = 12.82. Test if the study skills training program produced a significant difference in scores using a two-tailed test with an α = .01.

What is the verbal null hypothesis (H0)?