47. A meteorologist who samples 13 thunderstorms found that the average speed at which theytravelled across a certain state was 15 miles per hour. The standard deviation of the sample was1.7 miles per hour. If you find the 99% confidence interval of the mean, what is the margin oferror?5.626.485.696.39O O

Answered: Image /qna-images/answer/19fb8af5-0dc3-4feb-b201-9ef7d17779da.jpg

Answered: 47. A meteorologist who samples 13…

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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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 ^
Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest speed measured was 78.6Mbps. The complete list of 50 data speeds has a mean of x=15.15 Mbps and a standard deviation of s=21.46Mbps. a. What is the difference between carrier's highest data speed and the mean of all 50 data speeds? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the carrier's highest data speed to a z score. d. If we consider data speeds that convert to z scores between−2and 2 to be neither significantly low nor significantly high, is the carrier's highest data speed significant?
A grocer finds that the cantaloupes in his store have weights with mean 0.7 kg and standard deviation 53 grams. If this is true, then 99.7% of cantaloupes will have weights between how many grams?
3
12
Here are the monthly wage scales of 8 workers from XYZ Knit Works. 15 13 18 12 21 13 26 22 a. Determine the mean of the workers' wages. Answer in exact fraction, or rounded to at least 4 decimal places b. Determine the variance of the workers' wages. Answer in exact fraction, or rounded to at least 4 decimal places
4 The principal claimed that the student IQ in the school was 78. A random sample of 20 students was tested and showed mean score of 85, with a standard deviation of 8. Is this group significantly higher in IQ at the .01 level of significance? 5. The diameter of 110 tin cans by SIMBA Co. averaged 16.5 cms. with a standard of 2.54 cms. Is the diameter of the group significantly lower than the length of the diameter of the tin cans which is 20 cms.? 6. The average weight of a can of milk produced by TIBA Co. is 2.3 kgs. A random sample of 15 cans of milk was weighed and showed a mean weight of 2 kgs. with a standard deviation of 0.13 kgs. Test the hypothesis that the mean weight of these cans is lesser than what is standard at the .01 level of significance. 7. A random sample of 10 drinks from a soft drink machine was an average content of 18.9 deciliters with a standard deviation if 2.38 deciliters. Determine at the .05 level of significance if this group is significantly different from…
Use z scores to compare the given values. The tallest living man at one time had a height of 238 cm. The shortest living man at that time had a height of 142.4 cm. Heights of men at that time had a mean of 175.45 cm and a standard deviation of 5.59 cm. Which of these two men had the height that was more extreme? ... Since the z score for the tallest man is z = 0 and the z score for the shortest man is z = the man had the height that was Im- more extreme. (Round to two decimal places.) shortest tallest
Consider a set of data in which the sample mean is 27 and the sample standard deviation is 6.2. Calculate the z-score given that x = 28.5. Round your answer to two decimal places. An
In a measurement of B two results were obtained, B1 = (8.3+/- 0.78) mT and B2 = (8.81+/- 0.20) mT . The error on the weighted/arithmetic mean is (Report your answer in mT with 3 significant figures)
A researcher collects data that represents the average number of hours of sleep in the last two nights by 8 depressed patients and 9 non-depressed patients. The researcher is interested in whether the two groups reliably differ in the amount of sleep they get. Use Jamovi to calculate t-obt and the p value.
The mean cholesterol level for females in a population is 200 with a standard deviation of 25. Samples of size 64 are drawn from the population. A. What is the mean of the sample means? B. What is the standard error of the sample means?

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