Math

StatisticsQ&A LibrarySuppose we want to assess the effect of a one-day SAT prep class at a 5% level of significance. Scores on the SAT writing exam can range from 200 to 800. A random sample of 50 students takes the SAT writing test before and after a prep class. We test the hypotheses: H0 : μ = 0 Ha : μ > 0 where µ is the mean of the difference in SAT writing scores (after minus before) for all students who take the SAT prep class. The sample mean is 5 with a standard deviation of 18. Since the sample size is large, we are able to conduct the T-Test. The T-test statistic is approximately 1.96 with a P-value of approximately 0.028. Explain ?Start your trial now! First week only $4.99!*arrow_forward*

Question

Suppose we want to assess the effect of a one-day SAT prep class at a 5% level of significance. Scores on the SAT writing exam can range from 200 to 800. A random sample of 50 students takes the SAT writing test before and after a prep class. We test the hypotheses:

H_{0} : μ = 0

H_{a} : μ > 0

where µ is the mean of the difference in SAT writing scores (after minus before) for all students who take the SAT prep class.

The sample mean is 5 with a standard deviation of 18. Since the sample size is large, we are able to conduct the T-Test. The T-test statistic is approximately 1.96 with a P-value of approximately 0.028.

Explain ?

Tagged in

Math

Statistics

Find answers to questions asked by students like you.

Q: Regarding z-scores: a. How is a z-score obtained? b. What is the interpretation of a z-score? c. An ...

A: Click to see the answer

Q: 1. Draw a vertical line through a normal distribution for the following z score location, and find t...

A: Click to see the answer

Q: more opportunities to earn and invest than younger individuals. The following data were obtained fro...

A: Click to see the answer

Q: Statistics Question

A: The linear relationship between two continuous variables is described with the use of correlation.

Q: For a Friedman test, how do we a. measure variation among sample mean ranks for the treatments? b. d...

A: a. SSTR: The variation among the sample means for the treatments, computed for the ranks.

Q: Births The probability of a baby being born a boy is 0.512. Consider the problem of finding the prob...

A: Click to see the answer

Q: P-value? Interpret the p-value?

A: Click to see the answer

Q: Eye Color Based on a study by Dr. R Sorita at Indiana University, assume that 12% of us have green e...

A: a. Obtain the probability of at least 86 people with green eyes among 650 randomly selected people. ...

Q: Oxygen demand is a term biologists use to describe the oxygen needed by fish and other aquatic organ...

A: Consider X be a random variable that follows normal distribution indicates the oxygen demand in the ...