(a)
77.600 | mean Data |
11.587 | std. dev. |
(b) The hypothesis being tested is:
H0: µ = 75
Ha: µ > 75
(c) C.T.S = 0.710
p-value = 0.2480
(d) We cannot conclude that the mean score of all statistics exams is greater than 75.
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4. Scores of 10 randomly selected exams in a statistic class are given below: 98 78...
3. Scores of 12 randomly selected exams in a statistic class are given below: 98 78 90 70 80 55 78 77 70 80 78 86 (a) (6 points) Find the mean and standard deviation. Round your answer to a whole number. It has been reported that the mean score of all statistics exams is below 80. Test the validity of the report at a = 0.02 by using the data given above. (b) (4 points) Clearly state H, and...
3. Twelve different students were randomly selected and tested on Friday and Mon day. The table below shows results for each student. Monday s Table 3 Exam Results Sd: 5.2 points) Construct a confidence interval for the mean of all differences p 374422.1 At a = 0.1 lev ificance, test the claim that the giving exams on Mon- days help mcreasine exam results by using the data in table 3. (b) (3 points),lear state Ho H, identify the claim and...
A math test was given to five randomly selected schools. The result of the exams is given in the following table. School 1: 72 83 92 97 82 75 68 93 School 2: 75 81 95 92 88 70 70 90 97 84 76 School 3: 82 73 99 90 66 77 School 4: 71 85 91 95 89 73 70 96 92 83 71 58 63 89 School 5: 82 85 79 90 86 77 71 86 90 73...
Elementary Statistics Name: Study Guide 27 a Class: Due Date: Score: No Work No Polnts Use Pencil Only Be Neat & Organized 1. A local nurse's union has done a study on salary of full-time nurses, The result of this study is summarized in the table below. Females Males 60 ng48. ,-7050 36750 ir 81 Not Given sa Not Given a-275 o2250 Table 1: Monthly Salaries For Nurses (a) (3 points) Construct a 98% confidence interval for the difference between...
(d) (2 points) Use non-statistical terminology to express your final conclusion about the claim. (d) n15,s 23.45, n2- 15, s-15.55, H: a a, claim: H 7. Given (a) (2 points) Clearly state Ho and H, and identify the type of test. Ho H1: (b) (3 points) Find and name all related critical values, draw the distribution and clearly mark and shade the critical region(s) (e) (2 points) Find the computed test statistic and the P-value. P.Value C.T.S. (d) (2 points)...
QUESTION 30 Problem 5) Final scores of all the students in randomly selected 3 sections in a course, "Statistical Methods I"m San Houston State University are presented below. The weil Section 3: (69,92, 66,81, 76, 55, 70, 83, 68, 57, 80, 66, 69, 55, 88, 70, 70, 70,56,50) Section 6: (10,73,88,58, 89,69.63, 76, 87, 82, 97,76,66,95, 84, 88, 82, 81,68, 89) Section 9 (30,85, 76, 73,92, 65, 90, 71, 77, 78, 86, 91, 87, 78, 88, 77, 73,97,86,99) (9) An...
QUESTION 32 Problem 5) Final scores of all the students in randomly selected 3 sections in a course, "Statistical Methods I Sam Houston State University we pested below. There we wechsel Section 3: (69.92.66, 81, 76, 55, 70, 83, 68, 57, 80, 66, 69, 55, 58, 70, 70, 70, 56, 50) Section 6: (10, 73, 88, 58, 89, 69, 63, 76, 87, 82, 97, 76, 66,95, 84, 88, 82, 81,68, 19) Section 9. (30,85, 76, 73.92, 65,90, 71, 77, 78,...
ofessor believes that the final examination scores in statistics distributed. A sample of 40 final s sample of 40 final scores has been taken. You are given the sample below. The mean of the scores is 83.1, and the standar the scores is 83.1, and the standard deviation is 10.43. 56 63 65 68 72 72 73 75 77 78 78 79 80 80 80 80 80 80 81 81 82 84 84 86 86 87 88 90 90 92...
. Given: n1 = 50, x¯1 = 16.735, σ1 = 1.14, n2 = 45, x¯2 = 14.384, σ2 = 1.592 (a) (2 points) Round given data to one-decimal place, and then complete the following table. Sample 1 Sample 2 n1 = n2 = x¯1 = x¯2 = σ1 = σ2 = (b) (3 points) Construct 99% confidence interval for the difference between population means µ1 − µ2 using data summarized in the table. (b) Page 2 of 4 Study Guide...
Two placement exams are
available that students can take to determine which math class they
should begin with in their freshman year. It is believed that there
is no difference in the mean scores that would be received for the
two tests. To test this using a 0.05 level of significance, a
randomly selected group of students took both tests and had their
scores recorded. The following data were obtained: Student Test A
Test B 1 78 82 2 86...