上午10:05 4月21日周四7 87%•..26. A survey of a random sample of 210 male teens and 228 female teens, ages 13 years to 17 years, found that122 of the male teens and 160 of the female teens brush their teeth at least twice a day. If there is no differencebetween the proportions in the population of all male and female teens ages 13 years to 17 years who brush theirteeth at least twice a day, approximately how many males and females in the sample would be expected to brushtheir teeth at least twice a day?(A) 105 males and 114 females(B) 122 males and 160 females(C) 135 males and 147 females(D) 141 males and 141 females(E) 219 males and 219 females

We have given that the following statement A random sample of 210 male and 122 females 122 males and…

Answered: ... 26. A survey of a random sample of…

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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1. The following are the numbers of minutes it took random samples of boys and girls to complete a written test given for the renewal of their driving licenses. Boys 10.9 6.4 8.9 9.1 7.7 9.7 11.8 9.2 10 10.2 9.5 | 10.8 8 11 7.5 Girls 7.4 9.9 9.8 10.9 9.4 10.3 7.7 11.5 7.6 9.3 8.8 9.6 Use U test at 0.05 level of significance to decide whether to accept H, : 4 = or the alternative hypothesis H1 : 41 < 4z.
1) Estimate the difference between the ages of male and female respondents. (Q1=AGE, Q2=GENDER)
Section F: In a random sample of 150 unemployed males, 81 of them stated that they were regular consumers of alcoholic beverages. Let p denote the true proportion of unemployed males that are regular consumers of alcoholic beverages.
Section F: In a random sample of 150 unemployed males, 81 of them stated that they were regular consumers of alcoholic beverages. Let p denote the true proportion of unemployed males that are regular consumers of alcoholic beverages.
question 4 only
The table shows data about student involvement in extracurricular activities at a local high school. Extracurricular Activities Involved in Not Involved in Activities Activities Totals Male 112 145 257 Female 139 120 259 Totals 251 265 516 P(femalel involved in activities)? 265 516 139 251 251 516 139 516
A baseball team claims that the mean length of its games is 2.4 hours. State H0 and Ha in words and in symbols. Then determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed. Explain your reasoning. State the null hypothesis in words and in symbols. Choose the correct answer below. A. The null hypothesis expressed in words is, "the mean length of a baseball team's games is at most 2.4 hours." The null hypothesis is expressed symbolically as, "H0: μ≤2.4." B. The null hypothesis expressed in words is, "the mean length of a baseball team's games is more than 2.4 hours." The null hypothesis is expressed symbolically as, "H0: μ≠2.4." C. The null hypothesis expressed in words is, "the mean length of a baseball team's games is at least 2.4 hours." The null hypothesis is expressed symbolically as, "H0: μ≥2.4." D. The null hypothesis expressed in words is, "the mean length of a baseball…
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According to IT department of leading financial firm, 50% of emails received by their employees are spam. They are planning to install a software which filters the spam emails. A reputable cybersecurity brand has launched a software which claims to detect 99% of spam emails. However, they have also reported 5% as the chance of detecting a non-spam email as spam. If an email is detected as spam, what is the probability of it in fact being a non-spam email?
A survey described the results of a poll of working adults in Canada. Each person in a random sample was classified according to gender and the number of vacation days he or she usually took each year. The resulting data are summarized in the given table. Days of Vacation Gender Male Female None 51 42 1-5 21 25 6-10 67 79 11-15 106 98 16-20 71 70 21-25 82 58 More than 25 118 79 (a) Is it reasonable to conclude that there is an association between gender and the number of vacation days taken?Test the appropriate hypotheses using a 0.05 significance level. Calculate the test statistic. (Round your answer to two decimal places.)?2 =
A random sample of ny 16 communities in western Kansas gave the following information for people under 25 years of age. X: Rate of hay fever per 1000 population for people under 25 119 129 92 123 112 93 125 95 125 117 97 122 127 88 A random sample of n 14 regions in western Kansas gave the following information for people over 50 years old. x2: Rate of hay fever per 1000 population for people over 50 94 108 100 97 111 88 110 79 115 100 80 114 85 96 A USE SALT (1) Use a calculator to calculate x, 1, 2, and s2. (Rqund your answers to four decimal places.) () Assume that the hay fever rate in each age group has an approximately normal distribution. Do the data indicate that the age group over 50 has a lower rate of hay fever? Use a0.05. (a) what is the level of significance? State the null and altermate bypotheses. Ho: H P H P2
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