# Question: A production line at a candy plant is designed to

A production line at a candy plant is designed to yield 2- pound boxes of assorted candies whose weights in fact follow a normal distribution with a mean of 33 ounces and a standard deviation of .30 ounce. A random sample of 36 boxes from the production of the most recent shift reveals a mean weight of 33.09 ounces. (Incidentally, if you think about it, this is an exception to the usual situation where the investiga-tor hopes to reject the null hypothesis.)

(a) Describe the population being tested.

(b) Using the customary procedure, test the null hypothesis at the .05 level of significance.

(c) Someone uses a one- tailed test, upper tail critical, because the sample mean of 33.09 exceeds the hypothesized population mean of 33. Any comment?

(a) Describe the population being tested.

(b) Using the customary procedure, test the null hypothesis at the .05 level of significance.

(c) Someone uses a one- tailed test, upper tail critical, because the sample mean of 33.09 exceeds the hypothesized population mean of 33. Any comment?

**View Solution:**## Answer to relevant Questions

Reread the problem described in Question 10.5 on page 231. (a) What form should H0 and H1 take if the investigator is concerned only about salary discrimination against female members? (b) If this hypothesis test supports ...How should a projected hypothesis test be modified if you’re particularly concerned about (a) The type I error? (b) The type II error? It’s well established, we’ll assume, that lab rats require an average of 32 trials in a complex water maze before reaching a learning criterion of three consecutive errorless trials. To determine whether a mildly adverse ...Although the samples are actually related, an investigator ignores this fact in the statistical analysis and uses a t test for two independent samples. How will this mistake affect the probability of a type II error? Recall the experiment described in Review Question 16.11 on page 314, where errors on a driving simulator were obtained for subjects whose orange juice had been laced with controlled amounts of vodka. Now assume that ...Post your question