The work week for adults in the US that work full time is normally distributed with a mean of 47 hours. Anewly hired engineer at a start-up company believes that employees at start-up companies work more onaverage then most working adults in the US. She asks 12 engineering friends at start-ups for the lengths inhours of their work week. Their responses are shown in the table below. Test the claim using a 1% level ofsignificance. Give answer to at least 4 decimal places.Hours494759514769536046465554a. What are the correct hypotheses?Ho: Select an answerH₁: Select an answer ? O?Based on the hypotheses, find the following:b. Test Statistic =c. p-value =hoursmath.comhoursd. The correct decision is to Select an answere. The correct summary would be: Select an answerhours of all employees at start-up companies work more than the US mean of 47 hours.Question Help: Video Message instructorthat the mean number of

Answer Given,The level of significance = 1% = 0.01The sample size [n] = 12

Answered: The work week for adults in the US that…

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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Secretary of State Roxana Tillerson is worried about malpractice at the 4 processing centers for Green Cards in the country. Green Card applications are given a grade g on a scale 0-100. They are assigned randomly to different centers and thus Tillerson expects all centers to have similar mean scores. She collects the data in the table. #applications 9360 67.27 15.29 1 9870 66.74 14.64 7020 66.94 15.14 3 5040 67.02 14.84 4 rows x 3 columns At this point she just wants to decide whether or not to initiate a deeper investigation into malpractice at all sites. Does she have sufficient evidence for this, at 6% significance? SSTT number (rtol=0.01, atol=0.0001) SSE number (rtol=0.01, atol=0.0001) F. number (rtol=0.01, atol=0.0001) P-val number (rtol=0.01, atol=0.0001) O (a) No, she cannot make a conclusion O (b) Yes, she has enough evidence Select the key assumptions in the test you used. O (a) The populations are independent and therefore their covariances are zero. O (b) All sample sizes…
The mean sales prices for a sample of homes in a city was $250,000. The median sales price of these same homes was $459,000 . The distribution of home sale prices in this city is: Right Skewed Cannot tell from mean and median alone. Symmetric Left Skewed
Hellen has just started a new years competition for her local climbing gym. There are two categories for this competition: singles and group (18 people). The rules are simple, put in the most hours in one months time and you get a guided tour to climb Ten Sleep canyon. She knows from running this competition over the years that the number of hours climbers at her gym spend training during this competiton is approximately normal and their mean competition hours per month in the gym are 24 hrs with a standard devaition of 6 hrs If someone puts in between 25.5-32.1 hours on the wall they get a Mountain Goat shirt. What percent of the singles competitors is expected to get a shirt? In the group stage this year the winning group was in the 81 th percentile. What was their average time? The group stage is up for getting Gecko Socks if they also land between 25.5-32.1 hours on the wall on average. What prercent of the groups are expected to qualify for the socks?
Suppose the mean miles per gallon for a sample of 70,000 new cars and light trucks sold in the United States in 2017 differs from the population mean by more than one gallon. How would you interpret this result?
Hellen has just started a new years competition for her local climbing gym. There are two categories for this competition: singles and group (18 people). The rules are simple, put in the most hours in one months time and you get a guided tour to climb Ten Sleep canyon. She knows from running this competition over the years that the number of hours climbers at her gym spend training during this competiton is approximately normal and their mean competition hours per month in the gym are 38 hrs with a standard devaition of 6 hrs. Singles Distribution: X~N(,) Group Distribution: x̄~N(,) The winning single participant last year was in the 93 th percentile.... how many hours did the winner accumulate over the month? One of Hellan's friends Dave put in 46.74 hours on the wall. What is the probablity that another individual will beat his time? If someone puts in between 38.9-46.58 hours on the wall they get a Mountain Goat shirt. What percent of the singles competitors is expected to get a…
How much time do Americans living in or near cities spend waiting in traffic, and how much does waiting in traffic cost them per year? The file “congestion.xlsx” includes this cost for 31 cities. For the time Americans living in or near cities spend waiting in traffic and the cost of waiting in traffic per year: (Please see the excel file. It is in the same location with this question file). a. Compute the mean, median, first quartile, and third quartile. (Use Excel -Data Analysis to solve this problem) b. Compute the range, interquartile range, variance, standard deviation, and coefficient of variation. (Use Excel -Data Analysis to solve this problem) c. Construct a boxplot. Are the data skewed? If so, how? d. Compute the correlation coefficient between the time spent sitting in traffic and the cost of sitting in traffic. e. Based on the results of (a) through (c), what conclusions might you reach concerning the time spent waiting in traffic and the cost of waiting in traffic.…
In a city with three high schools, all the ninth graders took a Standardized Test, with these results: Number of ninth graders High School Mean score on test Glenwood Central City Lincoln High 81 92 72 273 333 159 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 81.7. Of course, that is incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place. mean of all ninth grader's scores =
In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Mean score on test Number of ninth graders Glenwood 80 267 Central City 93 302 Lincoln High 67 171 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 80 . Of course, that is incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place.mean of all ninth grader's scores =
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