2. (MMC 6.43). The Survey of Study Habits and Attitudes (SSHA) is a psychological testthat measures the motivation, attitude toward school, and study habits of students. Eachscore ranges from 0 to 200. The mean attitude score for U.S. college students is about110, and the standard deviation is about 25. A teacher who suspects that older studentshave better attitudes toward school gives the SSHA to 25 students who are at least 30years of age. Their mean score is = 118.3.a. Assuming that o = 25 for the population of older students, carry out a test ofHọ: H =Ha:u > 110Report the P-value of your test and state your conclusion clearly.= 110b. What are the required assumptions in part (a)?

One sample z-test is used to test the significance difference between the population mean and sample…

Answered: 2. (MMC 6.43). The Survey of Study…

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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In this exercise, you will compare Chebyshev’s rule and the empirical rule. a. Compare the estimates given by the two rules for the percentage of observations that lie within two standard deviations to either side of the mean. Comment on the differences.b. Compare the estimates given by the two rules for the percentage of observations that lie within three standard deviations to either side of the mean. Comment on the differences.
There are two major tests of readiness for college, the ACT and the SAT. ACT scores are reported on a scalefrom 1 to 36. The distribution of ACT scores for more than 1 million students in a recent high school graduatingclass was roughly Normal with mean ?? = 20.8 and standard deviation ?? = 4.8. SAT scores are reported on ascale from 400 to 1600. The SAT scores for 1.4 million students in the same graduating class were roughlyNormal with mean ?? = 1026 and standard deviation ?? = 209.Sonya scores 1310 on the SAT. Jerome scores 29 on the ACT. Assuming that both tests measure the same thing,who has the higher score? Report the z-score for both student and make sure to mark these on an appropriatenormal curve.
One hundred teachers attended a seminar on mathematical problem solving. The attitudes of twelve of the teachers were measured before and after the seminar. A positive number for change in attitude indicates that a teacher's attitude toward math became more positive. The 12 change scores are as follows: 3; 8; -1; 1; 0; 4; -3; 2; -1; 5; 4; -2 what is the standard deviation for this sample? what is the median change score? find the change score that is 2.2 standard deviations below the mean.
There are two major tests of readiness for college, the ACT and the SAT. ACT scores are reported on a scale from 1 to 36. The distribution of ACT scores is approximately Normal, with mean of 21.2 and standard deviation of 5.2, SAT scores are reported on a scale from 400 to 1600. The distribution of SAT scores is approximately Normal, with mean of 1,159 and standard deviation of 205. What ACT scores make up the top 10% of all the scores? Round to the nearest whole number. 80 888 #3 $ & 3 4. 7 E Y U F G H J K DI
Find the missing weight in the following data set: Person 1 2 3 4 weight 139 150 181 X Deviation from the Mean -21.5 -10.5 20.5 11.5
Which of the following would be the most reasonable estimate for the weight of house cats? (The population would be all house cats in the U.S., and the variable would be each cat's weight.) A. Mean = 10 pounds, standard deviation = 0 pounds. B. Mean = 10 pounds, standard deviation = 2 pounds. C. Mean = 10 pounds, standard deviation = 10 pounds. D. Mean = 2 pounds, standard deviation = 10 pounds.
Use z-scores to make the following comparison between students. a. Claudia has a score of 61. Her class had a mean score of 74 and a standard deviation of 4 . Convert Claudia's score to a z- score. b. Isabella has a score of 79. Her class had a mean test score of 82 and a standard deviation of 2. Convert Isabella’s score to a z-score. c. Based on the z-scores, which student did better on their test compared to their class (“had a better relative position”)?
Which of the following is the best measure of central tendency for age? Mode:55 Median:44.5 Mean:45.49
Find the standard deviation for the following data set. 2, 2, 2, 5, 5, 6, 6, 8, 8, 9 A. 2.49 B. 2 C. 5 D. 6.21 Which is the correct answer?
Find the mode, mean, and standard deviation of the following data: 3, 2, 3, 4, 6
You are considering taking two professors for a statistics course. Both professors have an average of 65%. The first professor has a standard deviation of 1%. The second professor has a standard deviation of 15%. Which professor do you have a better chance of passing with?
Which of the following measures of central tendency is fit for nominal data like employment status? Group of answer choices A. range B. mean C. mode D. median

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