Question

The scores for the test # 3 for Abe’s stat class from 9 randomly selected students...

The scores for the test # 3 for Abe’s stat class from 9 randomly selected students are as such 86 ,70, 95, 90, 77, 88, 85, 92, 90. By using 95% confidence level, find the confidence interval for the average test score for test # 3 for all Abe’s stat class.

7) A) E =5.85 B) E = 6.28 C) E =6.02 D) E = 5.89

8) A) 79.87 < < μ 91.91 B) 83.24 < < μ 121.27 C) 101.65 < μ < 122.34 D) 87.35 < μ < 95.82

Homework Answers

Answer #1

Solution:-
7) option C) 6.02

8) option A) 79.87 < < μ 91.91

Explanation:-

Given that 86,70,95,90,77,88,85,92,90

Mean = 85.89, sd = 7.83

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
the test scores of 12 randomly selected students in a class are 85, 79, 84, 94,...
the test scores of 12 randomly selected students in a class are 85, 79, 84, 94, 96, 78, 88, 91, 76, 99, 95, and 81. Assume the scores follow a normal distribution, calculate 90% confidence interval for the standard deviation of the scores for the class. (sample variance = 60.88)
The Test Scores for a Statistics course are given in the Excel below. The data (X1,...
The Test Scores for a Statistics course are given in the Excel below. The data (X1, X2, X3, X4) are for each student. X1 = score on exam #1 X2 = score on exam #2 X3 = score on exam #3 X4 = score on final exam Your professor wants to know if all tests are created equal. What is the F-Stat? EXAM1 EXAM2 EXAM3 FINAL 73 80 75 65.86667 93 88 93 80.16667 89 91 90 78 96 98...
16 students were randomly selected from a large group of students taking a certain calculus test....
16 students were randomly selected from a large group of students taking a certain calculus test. The mean score for the students in the sample was 86 and the standard deviation was 1.2. Assume that the scores are normally distributed. Construct a 98% confidence interval for the mean score, μ, of all students taking the test. Round your answer to two decimal places. a- (85.30 , 86.70) b- (85.22 , 86.78) c- (85.36 , 86.64) d- (85.28 , 86.72)
The following data set represents test scores from a math class at College A. Perform computations...
The following data set represents test scores from a math class at College A. Perform computations as instructed below. If you have decimals, use two or three decimal points in your answer.   Scores: 84, 79, 95, 65, 80, 76, 92, 88, 74, 90, 86, 72, 85 (a) What is the sum of the scores? (b) What is the mean of the data set? (c) What is the Sum of Squares (SS) of the data set? (d) What is the variance...
16 students were randomly selected from a large group of students taking a certain calculus test....
16 students were randomly selected from a large group of students taking a certain calculus test. The mean score for the students in the sample was 86 and the standard deviation was 1.3. Assume that the scores are normally distributed. Construct a 98% confidence interval for the mean score, μ, of all students taking the test. Round your answer to two decimal places.
Since we are attempting to examine the behavior of a class of students, the behavior of...
Since we are attempting to examine the behavior of a class of students, the behavior of an individual (as we calculated in objective 1) is really of little concern to us. Assuming that there are 30 students enrolled for a typical class, use the central limit theorem to calculate the following:    •   What would be the shape of the distribution of the average class grade of these 30 students?    •   What would be the average class average of...
A professor is interested in knowing the correlation, if any, of students’ scores on the first...
A professor is interested in knowing the correlation, if any, of students’ scores on the first and second exams given in his class. Test 1 Test 2 92 86 90 87 89 85 82 90 88 79 92 90 100 92 91 84 Select the correct statistical test; perform the test; report the results according to the handbook guidelines; explain what the results mean to the professor.
answer the following A professor is interested in knowing the correlation, if any, of students’ scores...
answer the following A professor is interested in knowing the correlation, if any, of students’ scores on the first and second exams given in his class. Test 1 Test 2 92 86 90 87 89 85 82 90 88 79 92 90 100 92 91 84 Select the correct statistical test; perform the test; report the results according to the handbook guidelines; explain what the results mean to the professor.
please answer ALL the question 1--The diastolic blood pressure (in mm Hg) of 84 patients with...
please answer ALL the question 1--The diastolic blood pressure (in mm Hg) of 84 patients with hypertension was: 88 98 78 84 77 81 90 82 75 72 92 85 92 77 84 77 82 100 92 88 74 80 95 90 87 80 83 77 86 80 88 90 79 82 93 100 80 85 96 85 90 84 82 95 88 97 80 88 94 92 88 96 90 103 88 86 84 90 98 88 86 95...
Sample scores from four different statistics class sections are shown below. Run an ANOVA test on...
Sample scores from four different statistics class sections are shown below. Run an ANOVA test on them and answer the following questions: Class 1 Class 2 Class 3 Class 4 95 79 77 81 99 68 91 96 75 84 84 68 76 78 84 89 82 74 75 78 97 93 82 75 93 95 82 88 83 88 85 98 86 95 96 59 What conclusion can we make about the hypothesis test?