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We want to conduct a hypothesis test of the claim that the population mean reading speed of second graders is different from 28.1 words per minute. So, we choose a random sample of students' reading speeds. The sample has a mean of 28.4 words per minute and a standard deviation of 2.9 words per minute. For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places. (a) The sample has size 19, and it is from a normally distributed population with a known standard deviation of 2.8. O z = O It is unclear which test statistic to use. (b) The sample has size 20, and it is from a population with a distribution about which we know very little. O It is unclear which test statistic to use.

We want to conduct a hypothesis test of the claim that the population mean reading speed of second graders is different from 28.1 words per minute. So, we choose a random sample of students' reading speeds. The sample has a mean of 28.4 words per minute and a standard deviation of 2.9 words per minute. For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places. (a) The sample has size 19, and it is from a normally distributed population with a known standard deviation of 2.8. O z = O It is unclear which test statistic to use. (b) The sample has size 20, and it is from a population with a distribution about which we know very little. O It is unclear which test statistic to use.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section: Chapter Questions
Problem 8SGR
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We want to conduct a hypothesis test of the claim that the population mean reading speed of second graders is different from 28.1 words per minute. So, we choose a random sample of students' reading speeds. The sample has a mean of 28.4 words per minute and a standard deviation of 2.9 words per minute. For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places. (a) The sample has size 19, and it is from a normally distributed population with a known standard deviation of 2.8. "our re Ot = O It is unclear which test statistic to use. (b) The sample has size 20, and it is from a population with a distribution about which we know very little. O It is unclear which test statistic to use. Check © 2022 McGra ace
Transcribed Image Text:We want to conduct a hypothesis test of the claim that the population mean reading speed of second graders is different from 28.1 words per minute. So, we choose a random sample of students' reading speeds. The sample has a mean of 28.4 words per minute and a standard deviation of 2.9 words per minute. For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places. (a) The sample has size 19, and it is from a normally distributed population with a known standard deviation of 2.8. "our re Ot = O It is unclear which test statistic to use. (b) The sample has size 20, and it is from a population with a distribution about which we know very little. O It is unclear which test statistic to use. Check © 2022 McGra ace
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