BUS 4025-8 : WEEK 5

1.      For the following statements, state the null and alternative hypotheses and identify which represents the claim. Determine when a type I or type II error occurs for a hypothesis test of the claim. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed, and explain your reasoning. Explain how you should interpret a decision that rejects the null hypothesis. Explain how you would interpret a decision that fails to reject the null hypothesis.

a.      It is reported that the number of residents in Wisconsin who support plans to recall the governor is 48%.

b.      An Amish bakery store states that the average shelf life of their fresh baked goods is seven days.

c.      A soda manufacturer states that the average number of calories in the regular soda is less than 150 calories per serving.

The census figures show that the average income for a family in a rural region is approximately $34,860 per year. A random sample has a mean income of $33,566 per year, with a standard deviation of $1,245. At a sig. level of .0.01 is there enough evidence to reject the claim? Explain.

The employees in a grocery store are handing out samples of a certain brand of Pizza. This is the pizza company’s way of determining whether people like the brand of pizza and would prefer it over other brands. Do you think this type of sampling is representative of the population? Explain. Identify possible flaws or biases in this study

 

 

 

 

A researcher claims that taking a protein supplement as part of a weight gainer program for athletes will help them gain muscle weight. The weights in pounds of 10 athletes are listed below before and after using the protein supplement.   At a sig. of .05 can you conclude that this supplement helps the athletes gain weight?

 

 

Athlete

1

2

3

4

5

6

7

8

9

10

Weight Before

196

220

187

184

206

198

174

176

182

174

Weight After

198

224

185

185

213

196

178

180

175

174

If you need assistance with writing your assignment, essay, our professional assignments / essay writing service is here to help!

Order Now