A statistics instructor would like to know whether it is worthwhile to require students to do weekly homework assignments. For one section of the statistics course, homework is assigned, collected and graded each week. For another section, the same problems are suggested each week, but the students are not required to turn in their homework. At the end of the semester, all students take the same final exam. The score distribution for the two sections are as follows:   With Homework         12      15        17        5         10 No Homework            12      21        28        25        14          Do these data indicate a significant difference between the score distributions for students with homework versus students with no homework? Test at the 5% level of significance.

Thirteen students entered the business program at Sante Fe College 2 years ago. The following table indicates what each student scored on the high school SAT math exam and their grade-point averages (GPAs) after students were in the Sante Fe program for 2 years. Student A B C D E F G SAT Score 423 375 590 693 608 390 418 GPA 2.93 2.87 3.03 3.48 3.66 2.85 2.18 Student HIJKLM SAT Score 484 734 501 613 712 362 GPA 2.56 3.22 2.01 2.77 3.90 1.58 a) The least - squares regression equation that shows the best relationship between GPA and the SAT score is (round your responses to four decimal places): ModifyingAbove y with caret = enter your response here + enter your response herex where ModifyingAbove y with caret = GPA and x = SAT score. b.) for a student with an SAT score of 390, the expected gpa = (round your response to the neares two decimal places.) c.) for a student with an SAT score of 790 the expected gpa = ( round your response to the neares two decimal places.) the coeffcient of…

Find the mode of the data set: 13, 32, 25, 27, 13 O 22 O 13 O 24.5 O 25 Eo search F3 F4 F5 F6 F7 F8 F9 2$ % &

You are given the following set of data. Its mean is 327. 255, 295, 345, 365, 375 If 25 is subtracted from each value, what will be the new mean? A. 270 O B. 327 OC. 315 O D. 302

Mai collects information about 37 classmates. She believes her data set is perfectly symmetrical with a mean and median of 20. She then realizes that the number she has recorded as 32 was actually supposed to be 42. What is true about the mean and median of her corrected data set? A: The mean and median of the corrected set are both still 20. B: The mean of the corrected data set is still 20, but the median is greater than 20. C: The median of the corrected data set is still 20, but the mean is greater than 20. D: The mean and median of the corrected set are both greater than 20.

A new statistics book has been written and a faculty member and a student are asked to rank the new book and the other five best statistics books. How much do the student and professor agree on their assessment of the books (1 being the favorite, 6 being the least)? Use the data below to answer the following question:

I can't understand why the data is the percentage of surveyed parents.

A student has an average of 81 on four equally weighted tests she has taken in her statistics class. What grade must she receive on her fifth test if she needs an average score of 83? Answer is 91? Can you help me to explain to me step by step?

Jocelyn believes that the amount of sleep she tends to get on weekends differs from the amount of sleep she tends to get during the school week. To investigate this claim, she randomly selects 10 weekend days and 10 school days. She consults her smart watch to determine the number of hours she slept for each of the selected days. Here are the data. School week: 7, 7.5, 8, 6.5, 8, 7.5, 7, 6.5, 7, 8Weekend: 9.5, 9.5, 8.25, 8.5, 7.5, 10.25, 8, 7, 9.5, 10 Jocelyn would like to determine if these data provide convincing evidence that the true mean amount of sleep she gets on the weekend differs from the true mean amount of sleep she gets during the school week. She tests H0: μS – μW = 0, Ha: μS – μW ≠ 0, where μW = the true mean amount of sleep Jocelyn gets on the weekend and μS = the true mean amount of sleep she gets during the school week. The conditions for inference are met. What are the values of the test statistic and P-value for a t-test about a difference in means? Find the…

According to a gallup survey of boys 77% of boys had played computer games in the past week compared to 65% of girls. You take and SRS of 104 boys and 120 girls How would you describe each distribution?