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(a) Find the sample mean. The sample mean is O (Round to two decimal places as needed.) (b) Find the sample standard deviation. The sample standard deviation is. (Round to two decimal places as needed.) (c) Construct a 90% confidence interval for the population mean u. The 90% confidence interval for the population mean u is (Round to two decimal places as needed.)

(a) Find the sample mean. The sample mean is O (Round to two decimal places as needed.) (b) Find the sample standard deviation. The sample standard deviation is. (Round to two decimal places as needed.) (c) Construct a 90% confidence interval for the population mean u. The 90% confidence interval for the population mean u is (Round to two decimal places as needed.)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 31PPS
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The following data represent the concentration of dissolved organic carbon (mg/L) collected from 20 samples of organic soil. Assume that the population is normally distributed. Complete parts (a) through (c) on the right. 29.80 15.42 15.42 27.10 16.51 20.46 8.81 20.46 14.90 33.67 30.91 14.86 5.20 15.35 9.72 19.80 14.86 8.09 16.87 18.30 (a) Find the sample mean. The sample mean is (Round to two decimal places as needed.) (b) Find the sample standard deviation. The sample standard deviation is (Round to two decimal places as needed.) (c) Construct a 90% confidence interval for the population mean u. The 90% confidence interval for the population mean u is ( | ). (Round to two decimal places as needed.)
Transcribed Image Text:The following data represent the concentration of dissolved organic carbon (mg/L) collected from 20 samples of organic soil. Assume that the population is normally distributed. Complete parts (a) through (c) on the right. 29.80 15.42 15.42 27.10 16.51 20.46 8.81 20.46 14.90 33.67 30.91 14.86 5.20 15.35 9.72 19.80 14.86 8.09 16.87 18.30 (a) Find the sample mean. The sample mean is (Round to two decimal places as needed.) (b) Find the sample standard deviation. The sample standard deviation is (Round to two decimal places as needed.) (c) Construct a 90% confidence interval for the population mean u. The 90% confidence interval for the population mean u is ( | ). (Round to two decimal places as needed.)
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