A camp director is interested in the mean number of letters each child sends during his or her camp session. The population standard deviation is known to be 2.1. A survey of 20 campers is taken. The mean from the sample is 7.1 with a sample standard deviation of 2.9. Part (a) Find the following. (Enter exact numbers as integers, fractions, or decimals.) (i) x = (ii) σ = (III) N= Construct a 90% confidence interval for the population mean number of letters campers send home. (i) State the confidence interval. (Round your answers to two decimal places.) (ii) Sketch the graph. (Round your answers to two decimal places. (iii) Calculate the error bound. (Round your answer to two decimal places.)
A camp director is interested in the mean number of letters each child sends during his or her camp session. The population standard deviation is known to be 2.1. A survey of 20 campers is taken. The mean from the sample is 7.1 with a sample standard deviation of 2.9. Part (a) Find the following. (Enter exact numbers as integers, fractions, or decimals.) (i) x = (ii) σ = (III) N= Construct a 90% confidence interval for the population mean number of letters campers send home. (i) State the confidence interval. (Round your answers to two decimal places.) (ii) Sketch the graph. (Round your answers to two decimal places. (iii) Calculate the error bound. (Round your answer to two decimal places.)
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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A camp director is interested in the mean number of letters each child sends during his or her camp session. The population standard deviation is known to be 2.1. A survey of 20 campers is taken. The mean from the sample is 7.1 with a sample standard deviation of 2.9.
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Part (a)
Find the following. (Enter exact numbers as integers, fractions, or decimals.)(i)x =
(ii)σ =(III) N=Construct a 90% confidence interval for the population mean number of letters campers send home.(iii) Calculate the error bound. (Round your answer to two decimal places.)(i) State the confidence interval. (Round your answers to two decimal places.)
(ii) Sketch the graph. (Round your answers to two decimal places.
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