# Question

A manufacturer wishes to test the hypothesis that “by changing the formula of its toothpaste, it will give its users improved protection.”The null hypothesis represents the idea that “the change will not improve the protection,” and the alternative hypothesis is “the change will improve the protection.” Describe the meaning of the two possible types of errors that can occur in the decision when the test of the hypothesis is conducted.

## Answer to relevant Questions

Suppose we want to test the hypothesis that the mean hourly charge for automobile repairs is at least $60 per hour at the repair shops in a nearby city. Explain the conditions that would exist if we make an error in decision ...For each of the following pairs of values, state the decision that will occur and why. a. p-value = 0.018, a = 0.01 b. p-value = 0.033, a = 0.05 c. p-value = 0.078, a = 0.05 d. p-value = 0.235, a = 0.10 You are testing the null hypothesis p = 0.4 and will reject this hypothesis if z_ is less than _2.05. a. If the null hypothesis is true and you observe z equal to - 2.12 which of the following will you do? (1) Correctly ...September is Library Card Sign-up Month. According to a nationwide Harris Poll during August 2008, 68% of American adults own a library card. Suppose you conduct a survey of 1000 randomly chosen adults in order to test Ho: p ...Find these critical values by using Table 8 of Appendix B. a. x2(18, 0.01) b. x2(16, 0.025) c. x2(8, 0.10) d. x2(28, 0.01) e. x2(22, 0.95) f. x2(10, 0.975) g. x2(50, 0.90) h. x2(24, 0.99)Post your question

0