10. In a survey, 500 adults in a certain country were asked how many hours they worked in the previous week. Based on theresults, a 95% confidence interval for mean number of hours worked was lower bound: 40.4 and upper bound: 43.6. Whichof the following represents a reasonable interpretation of the result? For those that are not reasonable, explain the flaw.Complete parts (a) through (d) below.(a) There is a 95% chance the mean number of hours worked by adults in this country in the previous week was between40.4 hours and 43.6 hours.A. Flawed. This interpretation implies that the population mean varies rather than the interval.B. Flawed. This interpretation makes an implication about individuals rather than the mean.O C. Flawed. This interpretation implies that the mean is only for last week.O D. Correct. This interpretation is reasonable.(b) We are 95% confident that the mean number of hours worked by adults in this country in the previous week wasbetween 40.4 hours and 43.6 hours.A. Flawed. This interpretation makes an implication about individuals rather than the mean.O B. Flawed. This interpretation does not make it clear that the 95% is the probability that the mean is within the interval.C. Correct. This interpretation is reasonable.O D. Flawed. This interpretation implies that the population mean varies rather than the interval.(c) 95% of adults in this country worked between 40.4 hours and 43.6 hours last week.O A. Flawed. This interpretation does not make it clear that the 95% is the probability that the mean is within the interval.O B. Flawed. This interpretation implies that the mean is only for last week.C. Flawed. This interpretation makes an implication about individuals rather than the mean.O D. Correct. This interpretation is reasonable.(d) We are 95% confident that the mean number of hours worked by adults in a particular area of this country in theprevious week was between 40.4 hours and 43.6 hours.A. Flawed. The interpretation should be about the mean number of hours worked by adults in the whole country, not atO B. Flawed. This interpretation makes an implication about individuals rather than the mean.OC. Flawed. This interpretation implies that the population mean varies rather than the interval.D. Correct. This interpretation is reasonable.11. A trade magazine routinely checks the drive-through service times of fast-food restaurants. An 80% confidence intervalthat results from examining 711 customers in one fast-food chain's drive-through has a lower bound of 171.3 seconds andan upper bound of 174.5 seconds. What does this mean?Choose the correct answer below.O A. One can be% confident that the mean drive-through service time of this fast-food chain isO B. One can be% confident that the mean drive-through service time of this fast-food chain is betweenO C. There is a% probability that the mean drive-through service time of this fast-food chain is betweenO D. The mean drive-through service time of this fast-food chain isseconds% of the timO O

Answered: Image /qna-images/answer/a0d7d4bb-178c-4ad1-ab9d-12f2b6d4b1ff.jpg

Answered: (a) There is a 95% chance the mean…

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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K A commuter tallied the time to work for 200 days and found that it resembled a normal curve. The mean time was 50 minutes, and the standard deviation was 2 minutes. For the 200-work-day experiment, find the percent of time commuting to work less than 44 minutes. 44 Minutes to Commute to Office 1 46 48 68%- 95% 99/7% 50
A team of ten (10) construction workers who are working on a project are classified according to the skill levels, Classes A to D. The table below shows the number of workers in each of the four (4) classes and their respective hourly pay-rate. Pay-rate (Rands/hour) Number of workers Class A 80 Class B 60 Class C 55 Class D 50 4. Calculate the mean hourly pay-rate for the 10 workers. A. R24.50/hour B. R57/hour C. R57.50/hour D. R61.75/hour
A random sample of 15 college students were asked "How many hours per week typically do you work outside the home?" Their responses are shown on the right. 13 30 4 Determine the shape of the distribution of hours worked by drawing a frequency histogram and computing the mean and median. Which measure of central tendency better describes hours worked? 13 6. 17 19 23 18 18 21 27 24 9 25 ..... Choose the correct frequency histogram below. OA. O B. C. Hours Worked Hours Worked Hours Worked per Week per Week per Week 10 20 30 10 20 30 10 20 30 hours hours hours Is the histogram for the data set skewed right, skewed left, or symmetric? skewed right skewed left O symmetric The mean number of hours worked by college students outside the home is approximately hours. (Type an integer or decimal rounded to three decimal places as needed.) The median number of hours worked by college students outside the home is hours. Which measure of central tendency better describes hours worked? median mode…
Which of the following statements is TRUE about the mean scores of the two sections? Descriptive Statistics Score Section A Section B Valid 45 45 Missing Mean 8.556 9.222 Std. Deviation 5.995 6.420 O a. Section B is more knowledgeable on the selected topic in Geometry than section A. b. Section B's mean score is higher than that of Section A's. O c. Section A's mean score is higher than that of Section B's. O d. Section A is more knowledgeable on the selected topic in Geometry than section B.
The mean # of hours worked
The mean price of a cup of coffee in Portland, OR is $3.94. The owner of a new coffee house believes that the mean price of coffee is different in their neighborhood. A sample of 8 coffee prices from other local coffee shops in their area are shown below. Price 4.2 2.15 3.35 3.5 2.25 2.4 3.9 3.4 Test the claim that mean price of a cup of coffee is not equal to $3.94 using a 5% level of significance. Assume that the coffee prices are normally distributed. Give answers to at least 2 decimal places. a) Fill in the hypotheses below: H0: H1: b) The p-value is 0.0234. The correct decision is to: The correct summary would be: sufficient, insufficient or not enough evidence to reject the claim
Español A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of 7.2 ounces of coffee per cup. BIG has good reason to believe that the mean amount of coffee dispensed by the machine, u, is greater than 7.2 ounces, and plans to do a statistical test of the claim that the machine is working as designed. Technicians gather a random sample of fill amounts and find that the mean of the sample is 7.6 ounces and that the standard deviation is 0.5 ounces. Based on this information, complete the parts below. (a) What are the null hypothesis H. and the alternative hypothesis H, that should be used for the test? Ho :0 O
Is the mean the measure of central tendency that makes the sum of squared deviations around it minimal?
2. (MMC 6.43). The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the motivation, attitude toward school, and study habits of students. Each score ranges from 0 to 200. The mean attitude score for U.S. college students is about 110, and the standard deviation is about 25. A teacher who suspects that older students have better attitudes toward school gives the SSHA to 25 students who are at least 30 years of age. Their mean score is = 118.3. a. Assuming that o = 25 for the population of older students, carry out a test of Họ: H = Ha:u > 110 Report the P-value of your test and state your conclusion clearly. = 110 b. What are the required assumptions in part (a)?
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8.Suppose you compare the mean of raw data and the mean of the same raw data grouped into a frequency distribution. These two means will be a. Exactly equal. b. The same as the median. c. The same as the geometric mean. d. Approximately equal.
What is a Type I error in this problem? A. A Type I error would be to conclude that the true mean level of support for sustainability is not 66 when, in fact, the mean is equal to 66. B. A Type I error would be to conclude that the sample mean level of support for sustainability is greater than 66 when, in fact, the sample mean is less than 66. C. A Type I error would be to conclude that the true mean level of support for sustainability is 66 when, in fact, the mean is not equal to 66. D. A Type I error would be to conclude that the sample mean level of support for sustainability is less than 66 when, in fact, the sample mean is greater than 66.

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