In studying the relationship between age and time spent exercising, suppose you computed r=−0.307 using n=20 data points. Using the critical values table below, determine if the value of r is significant or not. df CV (+ and -) df CV (+ and -) df CV (+ and -) df CV (+ and -) 1 0.997 11 0.555 21 0.413 40 0.304 2 0.950 12 0.532 22 0.404 50 0.273 3 0.878 13 0.514 23 0.396 60 0.250 4 0.811 14 0.497 24 0.388 70 0.232 5 0.754 15 0.482 25 0.381 80 0.217 6 0.707 16 0.468 26 0.374 90 0.205 7 0.666 17 0.456 27 0.367 100 0.195 8 0.632 18 0.444 28 0.361     9 0.602 19 0.433 29 0.355     10 0.576 20 0.423 30 0.349     Select the correct answer below:   1) r is significant because it is between the positive and negative critical values.   2) r is not significant because it is between the positive and negative critical values.   3) r is significant because it is not between the positive and negative critical values.   4) r is not significant because it is not between the positive and negative critical values.

The domestic airfare for business travel for the current year and the previous year was reported. Below is a sample of 12 flights with their domestic airfares shown for both years.   t-value=? (up to 3 decimal places) df=?

The following table presents the time taken to review articles that were submitted for publication to a particular journal during a recent year. A few articles took longer than  6 months to review; these are omitted from the table. Consider the data to be a population. Time (Months) Number of Articles −00.9 45 −1.01.9 18 −2.02.9 16 −3.03.9 17 −4.04.9 12 −5.05.9 13     (a) Approximate the variance of the times. Round the answer to at least two decimal places. The variance is    .(b) Approximate the standard deviation of the times. Round the answer to at least two decimal places.The standard deviation is    .

COMPUTE BY HAND NOT EXCEL, GOOGLE SHEETS etc 5. Write a brief paragraph about whether the in-home counseling is equally effective as the out of home treatment for two separate groups. Here are the data. The out come variable is level of anxiety after treatment on a scale from 1-10 Total In-home treatment X Out of home treatment Y X2 Y2 XY 1 3 7 9 49 21 2 4 6 16 36 24 3 1 7 1 49 7 4 1 8 1 64 8 5 1 7 1 49 7 6 3 6 9 36 18 7 3 5 9 25 15 8 6 6 36 36 36 9 5 4 25 16 20 10 1 2 1 4 2 11 4 5 16 25 20 12 5 4 25 16…