Question

In: Statistics and Probability

On a test you obtain a score of X = 80. If the instructor for the...

On a test you obtain a score of X = 80. If the instructor for the course provided descriptive statistics (M, SD) for the distribution of test scores, which result would you prefer: (a) M = 76, SD = 2 or (b) M = 76, SD = 8. Please explain your choice.

Solutions

Expert Solution


Related Solutions

Statistics students believe that the mean score on a first statistics test is 65. The instructor...
Statistics students believe that the mean score on a first statistics test is 65. The instructor thinks that the mean score is higher. She samples 10 statistics students and obtains the scores: Grades 73.5 68.4 65 65 63.9 68.4 64.3 66.5 61.9 69 Test grades are believed to be normally distributed. Use a significance level of 5%. State the standard error of the sample means:  (Round to four decimal places.) State the test statistic: t=t=  (Round to four decimal places.) State the...
1. Raul received a score of 80 on a history test, the z-score is 1.34. He...
1. Raul received a score of 80 on a history test, the z-score is 1.34. He received a score of 85 on a biology test, the z-score is 1.30. On which test did he do better relative to the rest of the class? a. History test b. Biology test c. He scored the class average on both the History and Biology test. 2. Which probability, P(z < -1.18) or P(z > 1.18) is greater? a. P(z < -1.18) b. P(z...
Let the mean test score be 80 and standard deviation be 10. Find probability that you...
Let the mean test score be 80 and standard deviation be 10. Find probability that you will get a score higher than 90. Find the probability that you will receive a score between 75 and 90. Find the probability that you will receive a score less than 60 Please explain more, thanks!
Test A               Score Respondent        X              Y &n
Test A               Score Respondent        X              Y         x-x       ( x-x) 2         y-y      ( y-y) 2  ( x-x) ( y-y) Jones 77 51 24.8 615.04 7.8 60.84 193.44 Dunn 66 59 13.8 190.44 15.8 249.64 218.04 Dean 41 44 -11.2 125.44 0.8 0.64 -8.96 Hampton 47 34 -5.2 27.04 -9.2 84.64 47.84 Nichols 32 28 -22.2 492.84 -15.2 231.04 337.44   Test B               Score Respondent        X              Y         x-x       ( x-x) 2         y-y      ( y-y) 2  ( x-x) ( y-y) Jones 50 51 -3.4 11.56 7.4 54.76 -25.16 Dunn 38 69 -15.4 237.16 25.40 645.16 -391.16 Dean 58...
Test Score System As a Systems Analyst, you are appointed to document requirements of a Test Score System.
1. The questions below relate to the following case study: System: Test Score System As a Systems Analyst, you are appointed to document requirements of a Test Score System. You are also required to study agile project management approach and apply it in the project. As part of the business process, the lecturer marks all the student papers, aggregates the scores and captures them. The Head of Department oversees the work of the lecturer. His duties in this regard include...
The following data on x = score on a measure of test anxiety and y =...
The following data on x = score on a measure of test anxiety and y = exam score for a sample of n = 9 students are consistent with summary quantities given in a paper. Higher values for x indicate higher levels of anxiety. Compute the value of the correlation coefficient. (Give the answer to four decimal places.) r = ________ x 23 13 15 0 17 21 19 14 20 y 44 59 49 76 49 51 46 52...
The average score and standard deviation of a kinesiology test were; Mean: 80 Std Dev: 4...
The average score and standard deviation of a kinesiology test were; Mean: 80 Std Dev: 4 What percentage of scores on the test were below 76? Show your calculations. 3 points What percentage of scores on the test were above 83? Show your calculations. 3 points What percentage of scores on the test were between 76 and 83? Show your calculations. 1 point What score on the test did a student earn if that student was at the 25th percentile...
Obtain at least three test methods for Covid-19 and obtain their sensitivity or specificity. You will...
Obtain at least three test methods for Covid-19 and obtain their sensitivity or specificity. You will need to research different sources from testing companies or independent tests. Which one would you recommend for your community?
An instructor wishes to see if the way people obtain information is independent of their educational...
An instructor wishes to see if the way people obtain information is independent of their educational background. A survey of 400 high school and college graduates yielded this information. At a=5%, test the claim that the way people obtain information is independent of their educational background. Table: Television newspaper other sources high school 159 90 51 college 27 42 31 College 27 42 31
Nurse             Pretest -Score            Post-test Score A              &nbs
Nurse             Pretest -Score            Post-test Score A                                  63                                81 B                                  89                                90 C                                 76                                89 D                                 71                                76        E                                  90                                90        F                                  56                                78        G                                 78                                82 - Conduct a t-test on the data and report your interpretation of the output.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT