On the first day of class, an economics professor administers a test to gauge the math preparedne...
A statistics professor would like to build a model relating student scores on the first test to the scores on the second test. The test scores from a random sample of 21 students who have previously taken the course are given in the table. Test Scores Student First Test Grade Second Test Grade 1 88 76 2 72 69 3 80 74 4 44 64 5 71 77 6 50 66 7 98 86 8 78 78 9 73 78...
For a sample of 20 New England cities, a sociologist studies the crime rate in each city (crimes per 100,000 residents) as a function of its poverty rate (in %) and its median income (in $1,000s). A portion of the regression results is shown in the accompanying table. Use Table 2 and Table 4. ANOVA df SS MS F Significance F Regression 2 2,517.3 1,258.6 7.49E-01 Residual 17 72,837.53 4,284.56 Total 19 75,354.80 Coefficients...
Problem 4: Variables that may affect Grades The data set contains a random sample of STAT 250 Final Exam Scores out of 80 points. For each individual sampled, the time (in hours per week) that the student spent participating in a GMU club or sport and working for pay outside of GMU was recorded. Values of 0 indicate the students either does not participate in a club or sport or does not work a job for pay. The goal of...
IC Price Income Temp Lag-temp 0.386 0.27 78 41 56 0.374 0.282 79 56 63 0.393 0.277 81 63 68 0.425 0.28 80 68 69 0.406 0.272 76 69 65 0.344 0.262 78 65 61 0.327 0.275 82 61 47 0.288 0.267 79 47 32 0.269 0.265 76 32 24 0.256 0.277 79 24 28 0.286 0.282 82 28 26 0.298 0.27 85 26 32 0.329 0.272 86 32 40 0.318 0.287 83 40 55 0.381 0.277 84 55 63...
the data below are the final exam scores of 10 randomly selected statistics students and the number of hours they studied for the exam. What is the best predicted value for the exam score for a student who stuided 2 hours? Assume that the varibles x and y have a significant correlation. Question 10 1 pts The data below are the final exam scores of 10 randomly selected statistics students and the number of hours they studied for the exam....
An experiment is conducted to determine if classes offered in an online format are as effective as classes offered in a traditional classroom setting. Students were randomly assigned to one of the two teaching methods. Data below. a. Test the claim that the standard deviations for the two groups are equal. What is the p-value of the test? b. Construct a 95% confidence interval on the difference in expected final exam scores between the two groups. Does the data support...
A client wants to determine whether there is a significant difference in the time required to complete a program evaluation with the three different methods that are in common use. Suppose the times (in hours) required for each of 18 evaluators to conduct a program evaluation follow. Method 1 Method 2 Method 3 69 63 59 72 71 65 66 76 67 78 69 55 75 73 57 73 70 63 Use α = 0.05 and test to see whether...
A professor wishes to test a claim that the mean test score of her first class is lower than the mean test score of her second class. A random sample of size 27 with a mean of 65.7 and a standard deviation of 5.4 is selected from her first class. A random sample of size 20 with a mean of 69.5 and a standard deviation of 12.1 is selected from her second class. Assume that test scores in both classes...
Please answer all questions! thanks :) VI/ Test scores from a math midterm are as follows: 79, 90, 85, 89, 70, 59, 75, 64, 83, 78, 75, 77, 78, 77, 67, 85, 74, 52, 87, 72, 69, 76, 61, 77, 93, 86, 79, 90, 74, 67, 51, 75, 77, 82, 78, 60, 86, 72, 91, 95, 82 Complete the frequency distribution table to include all data a. Class Tallies Class Midpoint Relative Cumulative Frequency relative freq boundaries Frequency 51 57...
Do men score lower on average compared to women on their statistics test? test scores of nineteen randomly selected male statistics students and twenty-eight randomly selected female statistics students are shown below. Assume Equal Variances. Male: 86, 83, 74, 76, 80, 63, 94, 91, 65, 95, 57, 91, 84, 85, 79, 76, 87, 94, 64 Excel Female: 88, 99, 82, 90, 65, 99, 76, 93, 93, 69, 70, 89, 96, 83, 74, 77, 90, 91, 100, 78, 76, 100, 78, 84, 100,...