Question

A study of the effect of television commercials on 12-year-old children measured their attention span, in seconds. The commercials were for clothes, food, and toys.

Clothes Food Toys
20 33 55
24 43 53
35 34 40
35 50 44
28 47 63
31 42 53
17 34 48
31 43 58
20 57 47
47 51
44 51
54

a. What are the null and alternate hypotheses?

Answer 1

In a statistical hypothesis testing scenario, the null hypothesis (H0) represents the default assumption, while the alternate hypothesis (H1 or Ha) contradicts the null hypothesis and suggests an alternative claim.

In this case, the study is measuring the effect of television commercials on attention span in 12-year-old children for clothes, food, and toys. Let's define the hypotheses:

Null Hypothesis (H0): There is no significant difference in attention span among 12-year-old children exposed to commercials for clothes, food, and toys.

Alternate Hypothesis (H1 or Ha): There is a significant difference in attention span among 12-year-old children exposed to commercials for clothes, food, and toys.

Therefore, the null and alternate hypotheses can be stated as follows:

H0: There is no significant difference in attention span for clothes, food, and toys commercials among 12-year-old children.

H1: There is a significant difference in attention span for clothes, food, and toys commercials among 12-year-old children.

Explanation: