A salesperson visits five customers per day. It is required that the sales achieved are through the table that is broken down below. Test at the .05 level of significance if there is a significant difference between the frequency of the number of daily sales.

Number of sales per day 0 1 2 3 4 5

Frequency of the number of sales 10 41 60 20 6 3

2. Chi Square of Contingency

The publisher of a newspaper wants to accurately identify the characteristics of his market. You want to know if the number of readers

in the community is related to their schooling. In a questionnaire he asked the adults who lived in the area,

their level of schooling and the frequency of reading. The results are included in the following table. Determine at a level of

significance of .10 if the frequency of reading newspapers in the community differs according to the schooling of the readers.

reading frequency

Postgraduate University Graduates Graduates 4th. year Did not finish school Total

Never 7 14 13 16 50

Sometimes 13 17 7 7 44

Morning or evening edition 39 41 10 5 95

Both editions 22 23 8 12 65

81 95 38 40 254

3. Analysis of variance (ANOVA)

The following data shows the number of claims processed daily by a group of four employees of an insurance company observed over a certain number of days. Test the hypothesis that there is a significant difference in the mean claims per day per employee. Use a significance level of .05.

Employee 1 15 17 14 12

Employee 2 12 10 13 17

Employee 3 11 14 13 15 12

Employee 4 13 12 12 14 10 9