Calculus and Above

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Determine the sample size n needed to construct a 90​%
Determine the sample size n needed to construct a 90​% confidence interval to estimate the population proportion when p=0.68 and the margin of error equals 8​%.At its peak after the 2007–2008 ​recessi… read more
Kofi
PhD in Statistics
Ph.D.
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1. The average licensed driver travels 1,536 miles per month
1. The average licensed driver travels 1,536 miles per month in his or her vehicle. Assume the population standard deviation is 429 miles per month. Determine the interval that will contain 96​% of th… read more
Scott
Master's Degree
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The cost of ink cartridges for inkjet printers can be
The cost of ink cartridges for inkjet printers can be substantial over the life of a printer. Printer manufacturers publish the number of pages that can be printed from an ink cartridge in an effort t… read more
MegaMath
Math Teacher
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Construct a​ 99% confidence interval to estimate the
Construct a​ 99% confidence interval to estimate the population mean using the data below. x=23 s=4.5 n=20 N=180 The​ 99% confidence interval for the population mean is ,. ​(Round to two decimal place… read more
Scott
Master's Degree
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Determine the sample size n needed to construct a 90​%
Determine the sample size n needed to construct a 90​% confidence interval to estimate the population proportion when p=0.68 and the margin of error equals 8​%. n=nothing ​(Round up to the nearest​ in… read more
Ann
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MSC Mathematics
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Construct a​ 90% confidence interval to estimate the
Construct a​ 90% confidence interval to estimate the population mean using the data below. x=60 σ=15 n=20 N=200 The​ 90% confidence interval for the population mean is ,. ​(Round to two decimal places… read more
Kofi
PhD in Statistics
Ph.D.
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According to recent data by the American Marketing​
According to recent data by the American Marketing​ Association, 79.8​% of people in the​ 18-24 age group used social media in 2017. You want to find out what the social media proportion is among your… read more
Kofi
PhD in Statistics
Ph.D.
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Construct a 99​% confidence interval to estimate the
Construct a 99​% confidence interval to estimate the population mean using the data below. x=16 s=5.9 n=24 What assumptions need to be made about this​ population? The 99​% confidence interval for the… read more
Kofi
PhD in Statistics
Ph.D.
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A national air traffic control system handled an average of
A national air traffic control system handled an average of 47,226 flights during 29 randomly selected days in a recent year. The standard deviation for this sample is 6,216 flights per day. Complete … read more
Kofi
PhD in Statistics
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Use the sample data and confidence level given below to
Use the sample data and confidence level given below to complete parts​ (a) through​ (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the​ poll, n equals … read more
Kofi
PhD in Statistics
Ph.D.
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Construct a 99​% confidence interval of the population
Construct a 99​% confidence interval of the population proportion using the given information. x equals 105 comma n equals 150 . The lower bound is nothing. The upper bound is nothing. ​(Round to thre… read more
Neo
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You are given the sample mean and the population standard
You are given the sample mean and the population standard deviation. Use this information to construct the​ 90% and​ 95% confidence intervals for the population mean. Interpret the results and compare… read more
akch2002
Master's Degree
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Method 1: Use the Student's t distribution with d.f. = n −
Method 1: Use the Student's t distribution with d.f. = n − 1.Method 2: When n ≥ 30, use the sample standard deviation s as an estimate for σ, and then use the standard normal distribution.Consider a r… read more
Sandhya_sharma
Master's Degree
Master's Degree
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Could you also answer this question for me? Thank you again
Could you also answer this question for me? Thank you again for your help earlier! -----------------------------------------------------------------------------------------------Method 1: Use the Stud… read more
Keith Pelletier
Master's Degree
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A research company desires to know the mean consumption of
A research company desires to know the mean consumption of milk per week among males over age 45. A sample of 1842 males over age 45 was drawn and the mean milk consumption was 4.9 liters. Assume that… read more
Sandhya_sharma
Master's Degree
Master's Degree
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1. In a week before and the week after a holiday, there were
1. In a week before and the week after a holiday, there were 10,000 total deaths, and 4952 of them occurred in the week before the holiday. a. Construct a 95% confidence interval estimate of the propo… read more
Ryan
Bachelor's Degree
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Find the margin of error for the given values of c, s, and
Find the margin of error for the given values of c, s, and n. C=0.95, s=2.3, n=49 E=_________ (Round to three decimal places as needed) Construct the confidence interval for the population mean µ. C= … read more
Stevewh
Teacher
Bachelor's Degree
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16. In a survey of 630 males ages 18-64, 391 say they have
16. In a survey of 630 males ages 18-64, 391 say they have gone to the dentist in the past year. Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and com… read more
Sandhya_sharma
Master's Degree
Master's Degree
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