StudentFirstexamgrade XSecondexamgrade YD=Y-X1382326828-15NOTE: EX2=30775,-40H*3404146517061716105060756688127074944055510ΣΥ=34560,ΣΧΥ=31336a. Test at (a=0.05) if the mean grade of the first Statistics exam is above 50?b.Give 95% CI for the mean grades of the second Statistics exam?c. Compute the correlation coefficient between the first and the second exam grades?d. Test at (a=0.05) if the mean grades of the first and second Statistics exams are differernt?e. Give 95% CI for the difference in mean grades between the second and the first exams?10551570MeanSD54.3 11.971555.019.181.717.1

Given the data asStudentFirst exam grade XSecond exam grade…

Answered: Student First exam grade X Second 1 38…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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QUESTION 11 Calculate the mean for how long it takes a client to buy your product? Time to buy a product online. Time in seconds for the sample. 45, 23, 29, 63, 12, 15. Use two decimal points for all questions in this test unless a specific question asks for something different.
Question 2 Save On a history test Patrick received a grade of 43 out of 50. The class mean was 35 with a standard deviation of 6. His girlfriend Kristin, in another section, received a grade of 87 out of 100. Her class mean was 75 with a standard deviation of 10. z-score for Patrick's grade (round to two decimal places) z-score for Kristin's grade = (round to two decimal places) Who received the higher grade relative to their respective classes? Why?
One of the z-score formulas will help on this question. Scores on the SAT test are normally distributed with a mean of 500 and standard deviation of 100 points. Pretend someone scored 400 on the math portion of the SAT test. What would be the z-score cut off for this score? A. 1.0 B. -1.0 C. 0 D. 2.0
please help!Find the standard deviation for the group of data items (Round to two decimal places as needed.) Stems Leaves 2 6 7 7 6 5 6 3 1 3 1 3
Use the data on student load. to test the claim that mean student load is more than 6.5 units. Use α = 0.10. Assume all requirements have been met. Student Unit Load 3, 12, 6, 9, 6, 12, 15, 12, 7, 9, 3 Test the claim that mean student load is more than 6.5 units. Use α = 0.10. Assume all requirements have been met.
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@ 2 5. Using the following data set: 2,7,9, 1, 3, 5 Find the mean, standard deviation, and the standard error. (You are now combining lectures 3, 4, and 7.) F2 W S #3 80 F3 E D $ † 4 Q F4 R FL % 5 112 0 T G ^ 6 MacBook Air F6 Y H & 7 FEB 27 N F7 U * 8 ∞ J D F
The mean score for first exam in your first organic chemistry class (section A) was 60, with a standard deviation of 5. Your score on the exam was 70. A. How many standard deviations above the mean is your score?
Question 4
2?
The mean performance score of a large group of fifth-grade students on a math achievement test is 76. The scores are known to be normally distributed. What percentage of the students had scores more than 2.1 standard deviations above the mean? Click here for page 1 of the Areas under the Normal Curve Table Click here for page 2 of the Areas under the Normal Curve Table The percentage of the students that had scores more than 2.1 standard deviations above the mean is%. (Round to two decimal places as needed.)
Please no written by hand solution and no img A researcher is interested in mother contingent responding to infant frowns. That just means mothers changing their behaviors to respond to infant behaviors, something that is expected to foster secure infant attachment to mothers. She knows that the mean proportion of contingent responding on infant frowns in the US is .30 (SD = .10). She goes to Fiji and observes one mother and her infant. That mother shows a proportion of contingent responding to infant frowns of .45. a. Test the hypothesis that mothers in Fiji are different from mothers in the US in terms of contingent responsiveness to infant frowns. Use an alpha level of .05.

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