# Question

For each experiment in question 28, indicate the type of graph you would create, and how you would label the X and Y axes.

In Question 28

(a) We test whether participants laugh longer (in seconds) to jokes told on a sunny or rainy day.

(b) We test babies whose mothers were or were not recently divorced, measuring whether the babies lost weight, gained weight, or remained the same.

(c) We compare a group of adult children of alcoholics to a group whose parents were not alcoholics. In each, we measure participants’ income.

(d) We count the number of creative ideas produced by participants who are paid either 5, 10, or 50 cents per idea.

(e) We measure the number of words in the vocabulary of 2-year-olds as a function of whether they have 0, 1, 2, or 3 older siblings.

(f) We compare people 5 years after they have graduated from either high school, a community college, or a four-year college. Considering all participants at once, we rank order their income.

In Question 28

(a) We test whether participants laugh longer (in seconds) to jokes told on a sunny or rainy day.

(b) We test babies whose mothers were or were not recently divorced, measuring whether the babies lost weight, gained weight, or remained the same.

(c) We compare a group of adult children of alcoholics to a group whose parents were not alcoholics. In each, we measure participants’ income.

(d) We count the number of creative ideas produced by participants who are paid either 5, 10, or 50 cents per idea.

(e) We measure the number of words in the vocabulary of 2-year-olds as a function of whether they have 0, 1, 2, or 3 older siblings.

(f) We compare people 5 years after they have graduated from either high school, a community college, or a four-year college. Considering all participants at once, we rank order their income.

## Answer to relevant Questions

(a) What is the range? (b) Why is it not the most accurate measure of variability? (c) When is it used as the sole measure of variability? (a) What does a z-score indicate? (b) Why are z-scores important? For each pair in question 15, which z-score has the higher frequency? In Question 15 (a) z = +1.0 or z = +2.3; (b) z = -2.8 or z = -1.7; (c) z = - .70 or z = - .20; (d) z = 0.0 or z = -2.0. Using the test in question 23, you measure 64 children, obtaining a X of 57.28. Slug says that because this X is so close to the ^ of 56, this sample could hardly be considered gifted. (a) Perform the appropriate statistical ...(a) What three things does the central limit theorem tell us about the sampling distribution of means? (b) Why is the central limit theorem so useful?Post your question

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