a 24. Calculate coefficient of concurrent deviation from the following data :Price368PriceImportsImports3842622213849b er i t ng 24385es yhslimie29of boTs(aunim) ng 28ooisv 2736120S JU Nse 400ntessia el ul22 bidi erb orber385347eir)

Introduction - Coefficient of concurrent deviations- It is a method used to find the correlation…

Answered: n 24. Calculate coefficient of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

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4. A research article reported that for a random sample of 850 meal purchases made at fast food chain A, the mean sodium content was 1,687 mg, and the standard deviation was 823 mg. For a random sample of 2,107 meal purchases made at fast food chain B, the mean sodium content was 1,474 mg, and the standard deviation was 811 mg. Based on these data, is it reasonable to conclude that there is a difference in mean sodium content for meal purchases at fast food chain A and meal purchases at fast food chain B? Use ? = 0.05. (Use ?1 for fast food chain A and ?2 for fast food chain B.) State the appropriate null and alternative hypotheses. A) H0: ?1 − ?2 = 0 Ha: ?1 − ?2 < 0 B) H0: ?1 − ?2 = 0 Ha: ?1 − ?2 ≠ 0 C) H0: ?1 − ?2 ≠ 0 Ha: ?1 − ?2 = 0 D) H0: ?1 − ?2 > 0 Ha: ?1 − ?2 = 0 E) H0: ?1 − ?2 = 0 Ha: ?1 − ?2 > 0 t=_________ P-value_______ State the conclusion in the problem context. A) We reject H0. It is not reasonable to conclude that there is a…
2) A company that manufactures and bottles apple juice uses a machine that automat- ically fills 16-ounce bottles. There is some variation in the amounts of liquid dispensed into the bottles. The amount dispensed is approximately normally distributed with mean 16 ounces and standard deviation 1 ounce. What proportion of bottles will have more than 17 ounces? A Wales ****
a. Find the mean and the standard deviation of the number of these computers that will be returned for refunds. b. Find the mean and standard deviation of the total refund cost that will accrue as a result of these 60 purchases.
Suppose that the quarterly sales levels among healthcare information systems companies are approximately normally distributed with a mean of 12 million dollars and a standard deviation of 1.1 million dollars. One health care information systems company considers a quarter a "failure" if its sales level that quarter is in the bottom 15% of all quarterly sales levels. Determine the sales level (in millions of dollars) that is the cutoff between quarters that are considered "failures" by that company and quarters that are not. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.
11. For the mathematics part of the Scholastic Assessment Test (SAT), the mean is 514 with a standard deviation of 113, and for the mathematics part of the American College Testing (ACT), the mean is 27 with a standard deviation of 5.1. Fatema scores a 660 on SAT and a 20.6 on ACT. Determine on which test she performed better. A. ACT B. Cannot be determined. C. Performed equally on both tests a D. SAT E. Depends on the subject areas covered F. Need more information about other students' scores Hint: A higher z-score indicates performing better.
3. Suppose a new sample is chosen and you got the following estimated OLS line: predicted birthweight_in_oz = 120-3.2 dailycigarettes. What would be your estimate of B if birth weight were recorded in pounds? (Hint: 1 pound 16 ounces) a. -38.4 b.-0.2 c. -0.15 d. -2.4
5. Letitia swam the girls 100m freestyle in 56.5 seconds. Ben swam the boys 100m freestyle in a time of 50.3 seconds. The mean time for the girls 100m at the swim meet was 58.6 seconds with a standard deviation of 2.3 seconds. The mean time for the boys 100m at the swim meet was 52.1 with a standard deviation of 1.8. Who swam the faster relative time? esc 180 1 27 @ 2 #3 13 $ OCT do % M ^
6. Life expectancy in the U.S. varies a bit from state to state. The lowest life expectancy at birth in 2012, 73.09 years, was in the District of Columbia. The highest, 80.23 years, was in Hawaii. The mean of all the state life expectancies is 77.19 years, with a standard deviation of 1.57 years. a) About what percent of states have mean life expectancies above 75 years. b) What mean life expectancy is in the 85% percentile?
A survey was conducted in the United States and 10 countries of Western Europe to determine the percentage of teenagers who had used marijuana and other drugs. The results are summarized in the following table. only parts 4-7 iv) Can you spot a country which contributes negatively to the association? If yes, explain how. v) The standard deviation of the percent of teens who have used marijuana is 15.55% and it is 10.24% for the percent who have used other drugs. Calculate the correlation between the percent of teens who have used marijuana and the percent who have used other drugs. Show the ”by hand” formula you may use. vi) What does the correlation coefficient confirm or specify? vii) Do these results allow you to say that marijuana is a ”gateway drug”, that is, that marijuana use leads to the use of other drugs? Explain
7. The mean June midday temperature in Desertville is 36°C and the standard deviation is 3°C. Assuming this data is normally distributed, how many days in June would you expect the midday temperature to be between 39°C and 42°C?
6. A kinesiologist wanted to examine the effects of temperature and humidity on exercise performance. Each participant was asked to walk on a treadmill at a normal pace for 60 minutes, and the kinesiologist recorded the distance walked (miles). She assigned participants to one of 4 conditions that varied in temperature (normal or high) and humidity (normal or high). Mean distance walked by the four groups are shown in the table below. Assume a = .05 and Tukey HSD = 0.39. Normal temperature High temperature Normal humidity M = 3.00 M = 2.80 High humidity M = 2.80 M = 2.00 Complete the following conclusion: The factorial ANOVA revealed significant main effects of temperature [F (1, 24) = 25.00, p<.05] and humidity [F (1, 24) = 19.65, p<.05] and a significant Temperature x Humidity interaction [F (1, 24) = 9.25, p < .05].

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n 24. Calculate coefficient of concurrent deviation from the following data : Price to gnsi 384 brioose r395 Imports 26 Imports Price D368 22 R JUGLGHE 24 384 21 er ti : Jan 29 1 (aunim) rog 28 bridi orb orfor385 onisisv27 385 es vhslimie 20 361 reRSTel o 22 347