If the chocolate is too heavy, Zachwill need to pay Hershey's distributor a small overage fee. Test again at the a .01 level of significance whether or not the chocolate is on weight or heavy. Assuming a null hypothesis that the chocolate is on weight (µ = .16 oz) versus the alternate hypothesis that it is over weight (u > .16 oz), set up the hypothesis and test using a one sample t-test. Show the t-score. Interpret the p-value. Assuming that the sample normal and random, does production need to pay an overage to the distributor ?

Test the claim below about the mean of the differences for a population of paired data at the level of significance a. Assume the samples are random and dependent, and the populations are normally distributed. Claim: H20; a=0.10. Sample statistics: d= -2.4, sd = 1.2, n = 15 Identify the null and alternative hypotheses. Choose the correct answer below. OA. Ho Hd #0 Ha Hg=0 OC. Ho Hd=0 Ha Hd #0 E. Ho Hd 20 Ha Hd 0 OD. Ho: Hy >0 Ha Hd ≤0 OF. Ho Hd <0 Ha Ha 20

Test the claim below about the mean of the differences for a population of paired data at the level of significance a. Assume the samples are random and dependent, and the populations are normally distributed. Claim: Hd = 0; a = 0.01. Sample statistics: d = 3.1, s = 8.72, n = 9 Identify the null and alternative hypotheses. Choose the correct answer below. O A. Ho: Ha 0 Ha: Hd s0 F. Ho: Ha s0 Hai Hd>0 The test statistic is t= 1.07 . (Round to two decimal places as needed.) The critical value(s) is(are) to (Round to two decimal places as needed. Use a comma to separate answers as needed.)

A pet food company is concerned that their pet food must have a certain % of the mineral zinc in the food. Too little and dogs get very sick. If the machinery is working correctly, the average zinc is u = .375 gram/lb of food. They sample 25 bags of food and find: i = .359 grams o = .05 grams The firm wants to know if their pet food is healthy. They decide on a 95% level of significance. Do the Z test. They ask you to perform the analysis. a) State the null and alternative hypotheses. Ho: На: b) Draw a picture/graph of what you are trying to find. c) Find the critical value you will use. d) Compute the test statistic (from the data) e) What do you conclude? Why?