Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track ofmany lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired studentsaveraged 8.74 hours of sleep, with a standard deviation of 2.55 hours. Assume that the number of hours of sleep for these visuallyimpaired students is normally distributed. Give your answers to 4 decimal places. Use at least 3 decimal places for your z-scores.(a) What is the probability that a visually impaired student gets less than 6.9 hours of sleep?answer:(b) What is the probability that a visually impaired student gets between 6.8 and 9.83 hours of sleep?answer:(c) Fourty percent of students get less than how many hours of sleep on a typical day?answer:hoursproblem

The random variable X is the number of hours of sleep for these visually impaired students It is…

Answered: Using diaries for many weeks, a study…

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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Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout. Suppose a friend tells you that the average length of trout caught in Pyramid Lake is ? = 19 inches. However, a survey reported that of a random sample of 51 fish caught, the mean length was x = 18.6 inches, with estimated standard deviation s = 3.5 inches. Do these data indicate that the average length of a trout caught in Pyramid Lake is less than ? = 19 inches? Use ? = 0.05. (a)What is the level of significance? =__ State the null and alternate hypotheses. A-H0: ? = 19 in; H1: ? ≠ 19 in B-H0: ? < 19 in; H1: ? = 19 in C-H0: ? = 19 in; H1: ? < 19 in D-H0: ? = 19 in; H1: ? > 19 in E-H0: ? > 19 in; H1: ? = 19 in (b)What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. A-The Student's t, since the sample size is large and ? is known. B-The standard normal, since the sample size is large and ? is known. C-The…

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