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
32	48	52
26	24	55
37	33	38
35	58	59
28	47	63
31	42	53
17	34	48
31	43	58
20	57	47
	47	51
	44	51
	54

1. Complete the ANOVA table. Use 0.05 significance level. (Round the SS and MS values to 1 decimal place and F value to 2 decimal places. Leave no cells blank — be certain to enter "0" wherever required. Round the df values to nearest whole number.)

2. Find the values of mean and standard deviation. (Round the mean and standard deviation values to 3 decimal places.)

Answer 1

Ans.

1.

Clothes	Food	Toys
32	48	52
26	24	55
37	33	38
35	58	59
28	47	63
31	42	53
17	34	48
31	43	58
20	57	47
	47	51
	44	51
	54

Note :- We find ANOVA , maen and standard deviation using MINITAB:-

Steps for ANOVA:-

1    Choose Stat > ANOVA > One-Way (Unstacked).

2    In Responses (in separate columns), enter the columns containing the separate response variables.

3    If you like, use any dialog box options, then click OK.

Decision:-

Since, P-value = 0.000 <

Hence, We reject H0 at

2. Steps for Mean and Standard deviation:-

1    Choose Stat > Basic Statistics > Display Descriptive Statistics.

2    In Variables, enter the columns containing the data you want to describe.

3 Click on Options, then select mean and standard deviation, then click OK.