Share
Explore BrainMass

Random Sample

Please explain fully, using Excel when necesary. These questions were addressed once already, but they were not explained in a way in which they could be fully understood. Please detail each step. Thanks!

1)A publisher is considering three different covers for a new magazine. A random sample of 90 people are asked to pick their favorite. 20 people selected cover A, 30 people liked cover B, and 40 people preffers cover C, can you conclude at 0.05 significance level the magazine covers are not equal attractive ?

Ho------------------- H1----------------------
a = 0.05; Critical value= --------
Decision rule ------------------
Test statistic (or p-value)? Decision and interpretation ?

Problem 2)The mean annual sales of a company in 36 of its department stores around the contry( They have over 1500 stores) Is \$23,860.000 with Standar deviation of \$2,150,000 A manager quotes the annual sales of her store to be 25,000,000. Does the sample data provide evidence to reject the manager's claim at a significance level of 0.01 ?
Ho----------------- H1-----------------
a = 0.01; Critical value = -----------
Decision Rule-----------------
Test Statistic (or p-value)? Decision and interpretation?

Solution Summary

Please explain fully, using Excel when necesary. These questions were addressed once already, but they were not explained in a way in which they could be fully understood. Please detail each step. Thanks!

1)A publisher is considering three different covers for a new magazine. A random sample of 90 people are asked to pick their favorite. 20 people selected cover A, 30 people liked cover B, and 40 people preffers cover C, can you conclude at 0.05 significance level the magazine covers are not equal attractive ?

Ho------------------- H1----------------------
a = 0.05; Critical value= --------
Decision rule ------------------
Test statistic (or p-value)? Decision and interpretation ?

Problem 2)The mean annual sales of a company in 36 of its department stores around the contry( They have over 1500 stores) Is \$23,860.000 with Standar deviation of \$2,150,000 A manager quotes the annual sales of her store to be 25,000,000. Does the sample data provide evidence to reject the manager's claim at a significance level of 0.01 ?
Ho----------------- H1-----------------
a = 0.01; Critical value = -----------
Decision Rule-----------------
Test Statistic (or p-value)? Decision and interpretation?

\$2.19