The National Sleep Foundation used a survey to determine whether hours of sleeping per night are independent of age (Newsweek,January 19, 2004). The following show the hours of sleep on weeknights for a sample of individuals age 49 and younger and for asample of individuals age 50 and older.Hours of SleepAgeFewer than 6 6 to 6.97 to 7.98 or more Total49 or younger4061746524050 or older325770101260a. Conduct a test of independence to determine whether the hours of sleep on weeknights are independent of age. Use a = .05. UseTable 12.4.Compute the value of the X 2 test statistic (to 2 decimals).The p value is selectWhat is your conclusion?Selectb. Using the total sample of 500, estimate the percentage of people who sleep less than 6, 6 to 6.9, 7 to 7.9, and 8 or more hours onweeknights (to 1 decimal).Less than 6 hours%6 to 6.9 hours%7 to 7.9 hours%8 or more hours%

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Answered: Conduct a test of independence to…

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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You are conducting a study to determine if there is a significant difference between average adult weight of males and females (in pounds). Calculate the test-statistic, twith the following sample data. 45, 1191, s1 = 7 60, 2 190, s2 = 7 Rounded to 2 decimal places.
During a weight loss study, each of eight subjects were given a diet for 4 months. Use the table, which shows the weight for the ten subjects before and after having the diet for 4 months, to answer the following questions. Refer to chart below. What is the standard error of the mean difference? What is the standardized test statistic ts? pound 1 2 3 4 5 6 7 8 Mean SD Weight after 4 months 168 177 196 180 229 144 197 252 192.88 34.34 Original weight 185 194 213 198 244 162 211 273 210 34.77 Difference -17 -17 -17 -18 -15 -18 -14 -21 -17.13 2.10
You are given n = 5 measurements 2, 1, 1, 3, 5. Find the sample standard deviation
Pain medications sometimes come with side effects. One side effect is dizziness. A researcher wanted to determine if some pain medications produced more or less dizziness than others. The results from his study are shown in the table below. Use a test to determine if the proportion of people within each treatment group who experienced dizziness are the same at the � = .01 level of significance. Tordol Placebo Naproxen Tylenol Advil Dizziness 83 32 36 5 8 No dizziness 4063 1832 1330 382 337 1) Determine the null and alternative hypotheses. Select the correct pair. ��:The proportion of people within each treatment group who experienced dizziness are independent��: The proportion of people within each treatment group who experienced dizziness are dependent ��: The proportion of people within each treatment group who experienced dizziness are the same��: The proportion of people within each treatment group who experienced dizziness are different 2) Determine the…
Refer to the accompanying table, which describes results from groups of 8 births from 8 different sets of parents. The random variable x represents the number of girls among 8 children. Find the mean and standard deviation for the number of girls in 8 births. Click the icon to view the data table. The mean is u= girl(s). (Round to one decimal place as needed.) The standard deviation is o = e# girl(s). (Round to one decimal place as needed.) Table of numbers of girls and probabilities Number of Girls x 0 1 2 3 4 5 6 7 8 átv P(x) 0.004 0.034 0.117 0.218 0.278 0.217 0.102 0.027 0.003 D - X NiZ Next
17
Below are the heights (in inches) of a sample of football players. Graph the boxplot and find the values for each of the quartiles and outlier(s), if they exist. (10 points for total) Students use the data below to calculate: 85 83 79 55 70 775 89 76 28. Smallest value= Q1= Q2= Q3= Largest value= 87 88 88 85 86 Outlier(s) Draw the Boxplot inside the box and label all values:
Refer to the accompanying table, which describes results from groups of 8 births from 8 different sets of parents. The random variable x represents the number of girls among 8 children. Find the mean and standard deviation for the number of girls in 8 births. Click the icon to view the data table. The mean is u = girl(s). (Round to one decimal place as needed.) The standard deviation is o = girl(s). (Round to one decimal place as needed.)
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sed on data from WHO, a representative sample of 11-year-old males could consist of the following 15 values. 15.7, 16.0, 13.9, 15.3, 18.6, 14.8, 17.7, 16.6, 18.1, 19.2, 16.3, 17.3, 16.9, 25.6, 20.4 using the data calculate the 85th per
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You want to compare differences in prior arrests across ethnicity in your study, you measured ethnicity as white =0 black =1 hispanic=2, and other =3. Prior arrests was recorded as the number of prior arrests. which test would you perform to see if arrests differ across diffrent ethnic categories? A. ANOVA B. T-test

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