Determine the sample size n needed to construct a 90% confidence interval to estimate the population mean for the following margins of error when a=91.a) 20b)30c) 40Click the icon to view a table of standard normal cumulative probabilities.GELEIDa) n= (Round up to the nearest integer.)Incorrect

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Answered: Determine the sample size n needed to…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E. that corresponds to a sample of size 234 with 29.1% successes at a confidence level of 95%.
2) The following data represent the number of passengers per flight in a random sample of 20 flights from Vienna, Austria, to Cluj-Napoca, Romania, with a new airline: 96 95 70 74 28 63 64 94 37 83 25 48 80 52 48 52 38 47 79 65 a) Find a 99% confidence interval for the mean number of passengers per flight. b) Find a 95% confidence interval for the population standard deviation.
In order to estimate the average amount a customer spends on a meal in a major restaurant, data was collected from a sample of 30 customers. Suppose the population standard deviation is $3 . If the sample mean is $22, what is the 95% confidence interval for the population mean? Select one: a. [20.93 , 23.07] b. [20.59 , 23.41] c. [21.99 , 22.01] d. [20.95 , 23.05]
A. Find the sample meanB. Find the sample standard deviation C. Construct a 98% confidence interval for the population mean(please show what numbers you are putting into the formula for part b)
Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E. that corresponds to a sample of size 323 with 50.2% successes at a confidence level of 95%.
7. use the given confidence interval to find the margin of error and the sample proportion. a. (0.719,0.745) b. (0.753,0.777)
Given a set of normally distributed scores with the mean of 20.00 and SD of 5.00, what proportion of scores are a) between 10 and 28 b) between 15 and 32
1. Suppose a random sample of 32 National Football League players had an average weight of 252.5 pounds. Assume that the standard deviation for weight of all players in the league is 31 pounds. Determine the margin of error for a 99% confidence interval for this sample.
The following numbers represent five randomly selected individuals’ ages: 20, 32, 36, 42, 45. If the age distribution for the whole population follows a normal distribution, which one represents the 90% confidence interval for the mean age based on this particular sample? A ) (20.26, 49.74) B ) (25.66, 44.34) C ) (14.83, 55.17) D ) (28.28, 41.72) E ) (23.72, 46.28)
Determine the margin of error for a 95% confidence interval to estimate the population proportion with a sample proportion equal to 0.90 for the following sample sizes. a. n= 100 b. n = 180 c. n = 250 Click the icon to view a portion of the Cumulative Probabilities for the Standard Normal Distribution table. ... a. The margin of error for a 95% confidence interval to estimate the population proportion with a sample proportion equal to 0.90 and sample size n = 100 is . (Round to three decimal places as needed.)
For the given data below, determine: a) the mean b) the standard deviation c) the variance d) the coefficient of variation e) the 95% confidence interval for the mean Also (f) construct a histogram using a range from 7.5 to 11.5 with intervals of 0.5:8.8, 9.5, 9.8, 9.4, 10, 9.4, 10.1, 9.2, 11.3, 9.4, 10, 10.4, 7.9, 10.4, 9.8, 9.8, 9.5, 8.9, 8.8, 10.6, 10.1, 9.5, 9.6, 10.2, 8.9

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