5 Students Home X PowerPoint Presentation X VA BBUnderStat11 - Chapter 7.4 - M x * Dashboard X + V X > C A webassign.net/web/Student/Assignment-Responses/submit?dep=29778977&tags=autosave#question4730961_10 Need Help? Read It Watch it 11. [1/3 Points] DETAILS PREVIOUS ANSWERS BBUNDERSTAT 12 7.4.020.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A study of parental empathy for sensitivity cues and baby temperament (higher scores mean more empathy) was performed. Let x, be a random variable that represents the score of a mother on an empathy test (as regards her baby). Let x, be the empathy score of a father. A random sample of 37 mothers gave a sample mean of x, = 68.70. Another random sample of 40 fathers gave x, = 59.72. Assume that , = 10.99 and 3, = 10.90. (a) Let u, be the population mean of x, and let #, be the population mean of x2 . Find a 99% confidence interval for #, - #2. (Round your answers to two decimal places.) lower limit 2.38 X upper limit 15.58 (b) Examine the confidence interval and explain what it means in the context of this problem. Does the confidence interval contain all positive, all negative, or both positive and negative numbers? What does this tell you about the relationship between average empathy scores for mothers compared with those for fathers at the 99% confidence level? O Because the interval contains only positive numbers, we can say that the mothers have a higher mean empathy score. O Because the interval contains both positive and negative numbers, we can not say that the mothers have a higher mean empathy score. We can not make any conclusions using this confidence interval. O Because the interval contains only negative numbers, we can say that the fathers have a higher mean empathy score. Need Help? Read it Master It 12. [7/7 Points] DETAILS PREVIOUS ANSWERS BBUNDERSTAT12 7.4.023.5. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER David E. Brown is an expert in wildlife conservation. In his book The Wolf in the Southwest: The Making of an Endangered Species (University of Arizona Press), he records the following weights of adult grey wolves from two regions in Old Mexico. Chihuahua region: x, variable in pounds 86 75 91 70 79 80 68 71 74 64 Durango region: x2 variable in pounds B8 f a 5:39 PM Sunny II P 11/13/2022