26. Please use the following information to answer questions 26-32:

Recent research suggests that children with ADHD tend to watch more TV than children who are not diagnosed with the disorder. To examine this relationship, a researcher obtains a random sample of n = 36 children aged 8-12 yrs old who have been diagnosed with ADHD. Each child is asked to keep a journal recording how much time they spend watching TV. The average daily TV time in the sample is 4.9 hours. It is known that in the population of 8-12 yr old children, = 4.1 hrs, = 1.8, and is normally distributed.

If the researcher had only used a sample of n = 9 children and obtained the same sample mean, would the results be sufficient to reject H0? Use an = .05.

Step 1: Which of the following correctly represents the null and alternative hypothesis for the mentioned sample ofn=9 (MUST SHOW WORK FOR THIS PROBLEM)?

a. Ho: 4.1

H_1:< 4.1

b. Ho: 4.1

H_1:> 4.1

c. Ho:= 4.1

H_1: 4.1

d. Ho:> 4.1

H_1: 4.1

27. Step 2:Which of the followingrepresents the critical region for this mentioned sample(MUST SHOW WORK FOR THIS PROBLEM)?

a. z=1.65

b. z=1.62

c. z=-1.65

d. z=1.65

28. Compute the test statistic(z-observed)for the mentioned sample(MUST SHOW WORK FOR THIS PROBLEM).

29. Based on the calculated test statistic,would you reject the null hypothesis established in question28(MUST SHOW WORK FOR THIS PROBLEM)?

yes

no

30. Based on the previously conducted steps,we canconclude(MUST SHOW WORK FOR THIS PROBLEM):

a. Children with ADHD watch significantly less TV

b. We cannot conclude that ADHD children watch more TV

c. Children with ADHD watch significantly more TV

d. We cannot make any meaningful conclusion at this time

31. Compute Cohen's d for this study(MUST SHOW WORK FOR THIS PROBLEM).

32. Interpret Cohen's d(i.e., what does it tell you about the TV viewing habits of children with ADHD compared to the general population?)

a. Children with ADHD watch TV at a rate that is.44SD below thepopulationmean

b. Children with ADHD watch TV at a rate that is2.67SD above the population mean

c. Children with ADHD watch TV at a rate that is1.33SD below the population mean

d. Children with ADHD watch TV at a rate that is0.44SD above thepopulationmean