The weight gains of animals during a period of confinement follow a normal distribution of mean 39.0 and standard deviation 1.0 kg. Answer the following questions. a.  Above what weight gain are 99% of the animals?

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According to the Carnegie unit system, the recommended number of hours students should study per unit is 2.  Are statistics students' study hours more than the recommended number of hours per unit? The data show the results of a survey of 15 statistics students who were asked how many hours per unit they studied. Assume a normal distribution for the population. 0.7, 4.1, 0.6, 4.4, 3.2, 0.8, 3.1, 3.8, 1.1, 3.3, 2.1, 1.5, 2.5, 2.3, 1.7 What can be concluded at the αα = 0.01 level of significance?  For this study, we should use     The null and alternative hypotheses would be:       H0:H0:                   H1:H1:               The test statistic     =  (please show your answer to 3 decimal places.) The p-value =  (Please show your answer to 4 decimal places.) The p-value is     αα Based on this, we should      the null hypothesis. Thus, the final conclusion is that ... The data suggest that the population mean study time per unit for statistics students is not significantly more…

IQ scores have a bell-shaped (mound shaped) distribution with a mean of 100 and a standard deviation of 10. Using the Empirical Rule, answer the following questions. a. What percentage of IQ scores are between 70 and 130? b. What percentage of IQ scores are less than 100? c. What percentage of IQ scores are between 90 and 110?