6.Refer to Exhibit 2. The hypothesis is to be tested at the 5% level of significance. The decision rule is not to reject the null hypothesis if
a.-1.96 < z< 1.96b.-1.645 < z< 1.645c.z> 1.96 or z< -1.96d.the number of "+" signs is greater than or equal to 20 and less than or equal to 130ANS: APTS:1

7.Refer to Exhibit 2. The test statistic based on the number of students who preferred to get out early equals
8.Refer to Exhibit 2. The null hypothesis should be
Exhibit 3A company advertises that food preparation time can be significantly reduced with the Handy Dandy Slicer. A sample of 12 individuals prepared the ingredients for a meal with and without the slicer. You are given the preparation times below.Preparation TimesPersonWith SlicerWithout Slicer120222121832018414225191962021719188151292218101925112126122320
9.Refer to Exhibit 3. To test the null hypothesis, the appropriate probability distribution to use is
10.Refer to Exhibit 3. The hypothesis is to be tested at the 5% level of significance. The decision rule is not to reject the null hypothesis if
a.-1.96 < z< 1.96b.-1.645 < z< 1.645c.z> 1.96 or z< -1.96
d.
the number of "+" signs is greater than or equal to 2 but less than or equal to 8

ANS: APTS:1
11.Refer to Exhibit 3. The test statistic equals
12.Refer to Exhibit 3. The null hypothesis should be
13.Independent random samples of ten day students and ten evening students at a university showed the following age distributions.DayEvening2632182425232730194030413442213933453135Use α= 0.05 and test for any significant differences in the age distribution of the two populations.ANS:T = 74.5Reject H0The populations are different.PTS:
1

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- Fall '12
- RicardoTovar-Silos
- Regression Analysis, Null hypothesis, A., B., c.