A researcher is interested in finding a 98% confidence interval for the mean number of times perday that college students text. The study included 99 students who averaged 32.3 texts per day.The standard deviation was 19.2 texts. Round answers to 3 decimal places where possible.a. To compute the confidence interval use a tdistribution.b. With 98% confidence the population mean number of texts per day is betweenandtexts.c. If many groups of 99 randomly selected members are studied, then a different confidenceinterval would be produced from each group. About percent of these confidence intervalspercent will notwill contain the true population number of texts per day and aboutcontain the true population mean number of texts per day.

Given n=99 X-bar=32.3 Standard deviations=19.2 Alpha=0.02

Answered: A researcher is interested in finding a…

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 = 2.9 inches. Do these data indicate that the average length of a trout caught in Pyramid Lake is less than ? = 19 inches? Use ? = 0.05. i-What is the value of the sample test statistic? (Round your answer to three decimal places.)
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