31. The mean waiting time at the drive-through of a fast-food restaurant from the time an order is placed to the timethe order is received is 87.5 seconds. A manager devises a new drive-through system that she believes willdecrease wait time. As a test, she initiates the new system at her restaurant and measures the wait time for 10randomly selected orders. The wait times are provided in the table.Suppose the wait time is normally distributed. Is the new system effective?Use the a = 0.1 level of significance.107.179.168.793.759.386.376.769.564.784.9

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Answered: 31. The mean waiting time at the…

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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A polling organization contacts 1620 undergraduates who attend a university and live in the United States and asks whether or not they had spent more than $200 on food in the last month. What is the population in the study? A. Undergraduates who attend a university. B. Undergraduates who attend a university and live in the United States. OC. Undergraduates who attend a university and live in the United States and have spent more than $200 on food. D. Undergraduates who attend a university and have spent more than $200 on food. What is the sample in the study? OA. Undergraduates who attend a university and live in the United States. B. The 1620 undergraduates who attend a university and live in the United States. OC. The 1620 undergraduates who attend a university and have spent more than $200 on food. OD. Undergraduates who attend a university.
a) Studies have shown that a positive association exists between educational level and annual salary; in other words, people with more education tend to make more money. i. Does this finding mean that more education causes a person to make more money? Explain your answer. ii. Do you think there is a causal relationship between educational level and annual salary? Explain your answer.
A survey of 10 students was conducted to investigate the amount of time they spend on social media each day. Students were given a timer and asked to record the number of minutes spent every time they accessed social media. The students' total times for one day are given below (in minutes).45 57 63 79 84 92 99 105 117 145 A student who was not included in the survey recorded a time of 240 minutes on social media. That value is: a. clearly an erroneous recording. b. inconsistent with these data. c. consistent with these data. d. an outlier. A group of veterinary researchers plans a study to estimate the average number of enteroliths in horses suffering from them. Previous research has shown the variability in the number to be = 2. The researchers wish the margin of error to be no larger than 0.5 for a 99% confidence interval. To obtain such a margin of error, the researchers need at least:…
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Statistics Question
Compute the arithmetic mean of the following numbers. (Round your answer to one decimal place.) 45, 68, 68, 25, 23 О32.4 41.0 45.0 45.8
For letter B please plug in the number 6
10- Any number or quantity that can differ from one another is called: a. Sample b. Data c. Variable d. Population
NO An online test of English spelling looked at how well people spelled difficult words. The bar graph to the right shows how many people per 100 spelled each word correctly. a. Estimate the number of people per 100 who spelled weird correctly. Round to the nearest 5. b. In a group consisting of 8721 randomly selected people, estimate how many more people can correctly spell weird than inoculate. Number of People per 100 Spelling Various Words Correctly weird N cemetery accommodation harass supersede inoculate F 0 a. The approximate number of people per 100 who spelled weird correctly is (Type a whole number.) 10 20 40 60 80 100 Number of people (per 100) Q Q G

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