D explain to someone who knows no statistics but is

Info icon This is a preview. Sign up to view the full content.

View Full Document Right Arrow Icon
(d) Explain to someone who knows no statistics but is interested in weight-loss programs what the practical conclusion is. Chapter 12 3 Test 12A
Image of page 3
10. Mars Inc., makers of M&M’s candies, claims that they produce plain M&M’s with the following distribution: Brown: 30% Red: 20% Yellow: 20% Orange: 10% Green: 10% Blue: 10% A bag of plain M&M’s was selected randomly from the grocery store shelf, and the color counts were as follows: Brown: 16 Red: 11 Yellow: 19 Orange: 5 Green: 7 Blue: 3 (a) You want to conduct an appropriate test of the manufacturer’s claim for the proportion of yellow M&M’s. Identify the population and parameter of interest. Then state hypotheses. (b) State and verify the conditions for performing the significance test. (c) Calculate the test statistic and the P -value. (d) What do you conclude about the manufacturer’s claim? Explain. (e) Based on this sample, construct and interpret a 90% confidence interval for the proportion of yellow M&M’s candies produced by Mars. Chapter 12 4 Test 12A
Image of page 4