A manager at a local discount gym believes that less than 20% of gym members usethe gym, at least 5 days a week. She randomly selects 100 gym members and tracks(using the electronic login system at the door) how many days they used the gym overthe 2-week period. The following are the results:25367657452=3030.0043a+94470Standard Normal Distribution Table106541461364a. Calculate the test statistic.4312282276295128103105833915133121112Test the manager's claim at the 10% level of significance.7777 IN W ∞ ∞Round to two decimal places if necessaryEnter 0 if normal approximation to the binomial cannot be used86O RejectO Fail to RejectO Cannot Use Normal Approximation to Binomial82b. Determine the critical value(s) for the hypothesis test.11483 12536347610 1∞ ∞0 ~ - ~ ∞0 I 3 -88111052125138N N22c. Conclude whether to reject the null hypothesis or not based on the test statistic.

A manager believes that less than 20% of gym members use the gym at least 5 days a week. Sample size…

Answered: the gym, at least 5 days a week. She…

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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For a recent 10k run, the finishers are normally distributed with mean 63 minutes and standard deviation 14 minutes. Complete parts (a) through (d) below. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. ed: a. Determine the percentage of finishers with times between 45 and 75 minutes. Score: Approximately % of finishers had times between 45 and 75 minutes. (Round to two decimal places as needed.) S: Que uestion 1 (1 % 5 6 & 7 * 8 ( 9 Correct: 1
Beef Consumption. According to Food Consumption, Prices, and Expenditures, published by the U.S. Department of Agriculture, the mean consumption of beef per person in 2011 was 57.5 lb. A sample of 40 people taken this year yielded the data, in pounds, on last year’s beef consumption given on the WeissStats site. Use the technology of your choice to do the following. a. Obtain a normal probability plot, a boxplot, a histogram, and a stem-and-leaf diagram of the data on beef consumptions. b. Decide, at the 5% significance level, whether last year’s mean beef consumption is less than the 2011 mean of 57.5 lb. Apply the onemean t-test. c. The sample data contain four potential outliers: 0, 0, 0, and 13. Remove those four observations, repeat the hypothesis test in part (b), and compare your result with that obtained in part (b). d. Assuming that the four potential outliers are not recording errors, comment on the advisability of removing them from the sample data before performing the…
12need help with parts A, D and E please
The grades for 30 students on the most recent exam are given in the data table below: Round your answer to 2 decimal places as needed 70 70 80 80 70 60 90 80 80 80 60 70 70 70 70 90 70 70 80 90 60 90 70 60 90 70 06 90 90 80 What is the mean score for the exam? What is the median score for the exam? What is the standard deviation for the exam?
A developmental psychologist is interested in studying how long babies gaze at a photograph of a human face. To test this question, she shows a picture to a sample of six babies and records the length of their gaze in seconds. The data are as follows: 12, 17, 18, 20, 20, 29. Calculate the mean, median, mode, range, variance and standard deviation for the sample.
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According to the Carnegie unit system, the recommended number of hours students should study per unit is 2. Are statistics students' study hours more than the recommended number of hours per unit? The data show the results of a survey of 12 statistics students who were asked how many hours per unit they studied. Assume a normal distribution for the population. 1.2, 4.3, 4.5, 1.4, 1.5, 2.7, 1.8, 2.4, 1.3, 2, 2.2, 1.3 What can be concluded at the αα = 0.05 level of significance? A. Thus, the final conclusion is that ... The data suggest the populaton mean is significantly more than 2 at αα = 0.05, so there is enough evidence to conclude that the population mean study time per unit for statistics students is more than 2. The data suggest the population mean is not significantly more than 2 at αα = 0.05, so there is enough evidence to conclude that the population mean study time per unit for statistics students is equal to 2. The data suggest that the population mean study time per…
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