 , 08.11.2019 12:31, alfonso55

# a teacher wants to compare the mean geology scores of two different classes...

a teacher wants to compare the mean geology scores of two different classes. she is testing the null hypothesis that there is no difference in the population mean scores of the two classes. the difference of the sample means is 51.4. if the standard deviation of the distribution of the difference of sample means is 16.66, what is the 95% confidence interval for the population mean difference? a)between -33.2 and + 33.2 b)between -49.9 and +49.9c)between -102.8 and +102.8d)between -154.2 and +154.2 ### Other questions on the subject: Mathematics Mathematics, 09.03.2020 13:49, cpalabamagirl2595
23) 84% of a contractor’s jobs involves electrical work. 75% of a contractor’s jobs involve plumbing work. Of the jobs that involve plumbing, 90% of the jobs also involves electrical work. Let E = jobs involving electrical work L = jobs involving plumbing work Suppose one of the contractor’s jobs is randomly selected. Using the sixth Excel worksheet, a) Find P(E). 0.84 b) Find P(L). 0.75 c) In words, what does E | L mean? d) Find P(E | L). e) Find P(E and L). f) Are E and L independent events? Why or why not? g) Find P(E or L). h) Are E and L mutually exclusive? Why or why not Mathematics, 09.03.2020 13:41, romedome15
The triangle shown below has an area of 12. find x Mathematics, 09.03.2020 13:41, Heneyda
I need some help with this answer :) Mathematics, 09.03.2020 13:41, donahueno1753
The mean and median of 100 observations are 50 and 52 respectively. The value of the largest observation is 100. It was later found that it is 110. Find the true mean and median.
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a teacher wants to compare the mean geology scores of two different classes. she is testing the null...

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