1) The Model is reliable. In the given scatter plot the correlation coefficient (r = 0.85) is representing the data is highly postively correlated that means if admissions examination scores increases then Freshman year GPA would increase. The model is reliable with in the range. It is a linear model as well . For interpolation we can use the model to predict the GPA scores and admissions score.
2) Here 7 and 150 are both are not in the model. For Extrapolation, the data values are very furthest so in that situation the model may produce unsatisfactory results therefore the model in Unreliable for 150 because it is beyond the limits.
Figure 1. Scatter Plot admission test scores with freshman year Grade Point Average (GPA), r=0.85 000...
A professor obtains SAT scores and freshman grade point averages (GPAs) for a group of n = 15 college students. The SAT scores have a mean of M-580 with SS - 22,400, and the GPAs have a mean of 3.10 with SS = 1.26, and SP = 84. Find the regression equation for predicting GPA from SAT scores. (Use five decimal places for the slope.) What percentage of the variance in GPAs is accounted for by the regression equation? (Compute...
1. The Graduate Management Admission Test (GMAT) is a test required for admission into many masters of business administration (MBA) programs. Suppose a random sample of 8 students took the test, and their scores are given below. 699, 560, 414, 570, 521, 663, 727, 413 a. Find a point estimate of the population mean. b. Write a sentence about how you can verify the data could come from a population that is normally distributed, using the graph below. c. Construct...
IB math studies 1. Ten students were asked for their average grade at the end of their last year of high school and their average grade at the end of their last year at university. The results were put into a table as follows: Student High School grade, University grade, y 90 3.2 2.6 75 80 3.0 70 95 3.8 85 90 3.8 2.8 70 95 85 3.0 3.5 10 Total 835 30.4 (a) Given that s, 8.96, sy-0.610 and...
please peovide coding in R: with a data of 13 variables and 200 observations Using the variable CLASS, test at 5% significance level to test the claim that the proportions of Freshmen, Sophomores, Juniors, and Seniors are the same. 2. Repeat part (a) for the variable COLLEGE. RLM ENGLISH MATH COMP 21 16 25 839SSESSOR 8 F 17 F N H ABCD 1 SEX HSP GPA AGE CREDITS CLASS COLLEGE MAJOR RESIDENCY TYPE 2 Transfer Blochm Resident F 75 2.39...
TEST 1: ANSWERS INTS EACH). This section takes around 5 minutes. Name Spring 2019 8) A researcher wants to determine whether female teachers give higher or lower grades, on average, then male teachers. She picks a random sample by picking a random sample of schools, in the schools picked, picking a random sample of departments, and in the departments picked, picking a random sample of teachers. What kind of sampling was performed? d) voluntary response e) cluster b) stratified Random...