The marketing manager of zanga zanga enterprise claims that the performance of sales team in lusaka and choma is the same. she collected sales achieved in three products in lusaka and choma. the following are the sales gathered:

a
b
c

lusaka
30
45
55

choma
35
30
65

is there sufficient evidence to justify the marketing manager’s claim at level of significance of 1%?

Astudy was conducted to determine the proportion of people who dream in black and white instead of color. among 306 people over the age of 55, 68 dream in black and white, and among 298 people under 25, 13 dream in black and white ( based on data from do we dream in color) we want to use a 0.01 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion of those under 25.