Exercise 08.02 Algo (Population Mean: Sigma Known)A simple random sample of 60 items from a population with a9 resulted in a sample mean of 31.If required, round your answers to two'decimal places.a. Provide a 90% confidence interval for the population mean.b. Provide a 95% confidence interval for the population mean.c. Provide a 99% confidence interval for the population mean.toExercise 08.02 Algo (Population Mean: Sigma Known)dy

Given information sample size n=60 Sample mean x=31 Population SD σ=9

Answered: Exercise 08.02 Algo (Population Mean:…

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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Age Differences In a large hospital, a nursing director selected a random sample of 43 registered nurses and found that the mean of their ages was 31.5. The population standard deviation for the ages is 4.5. She selected a random sample of 32 nursing assistants and found the mean of their ages was 29.7. The population standard deviation of the ages for the assistants is 5.3. Find the 95% confidence interval of the differences in the ages. Use μ1 for the mean age of the nursing assistants. Round the answers to at least one decimal place. Use a TI-83 Plus/TI-84 Plus calculator. ? < μ1- μ2 < ?
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Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week. A sample of 85 weekly reports showed a sample mean of 18.5 customer contacts per week. The sample standard deviation was 5.4. Provide 90% and 95% confidence intervals for the population mean number of weekly customer contacts for the sales personnel. 90% confidence interval, to 2 decimals: 95% confidence interval, to 2 decimals:
Exam 2 Math 200 Fall 2019-03 7. A random sample of 31 people in a nursing home had a mean systolic blood pressure of 153 mmHg and standard deviation of 35 mmHg. Find the 90% confidence interval for the mean blood pressure of people in the nursing home. Interpret the result. Name:
You measure 49 texbook's weights, and find they have a mean weight of 85 ounces. assume the population standard deviation is 3.6 ounces. Based on this, construct a 95% confidence interval for the true population mean textbook weight. round your answer to 2 decimals
Find the value for each ta/2 Prompts Submitted Answers n = 18 for the 99% confidence interval for the Choose a match mean. n = 10 for the 90% confidence interval for the Choose a match mean. n = 15 for the 98% confidence interval for the Choose a match mean.
You measure 40 dogs' weights, and find they have a mean weight of 71 ounces. Assume the population standard deviation is 9.6 ounces. Based on this, construct a 95% confidence interval for the true population mean dog weight. Give your answers as decimals, to two places ounces
The mean score on the math portion of the ACT for the year 2000 is μ = 20.7. A sample of 20 students in a local school district had a mean of 22.95. Using the sample, a 95% confidence interval estimate for the mean is (20.76, 25.14). State the point estimate for the mean ACT score for students. Based on this sample information , do you believe that the local students have a mean different from the general population? Why? 22.95 is in the center of the interval. The means are definitely not different. 22.95 is just outside the 95% confidence interval. Can't say the means are really different. 22.95 is not equal to 20.7. The means are definitely different. 20.7 is just outside the 95% confidence interval. Can't say the means are really different.
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