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
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1.The following distribution list displays the number of​
1.The following distribution list displays the number of​ no-shows for a particular flight and the historical probability that each number of​ no-shows will occur. A​ no-show is a person who has a res… 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
Master's Degree
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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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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
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11. A human resource manager for a large company takes a
11. A human resource manager for a large company takes a random sample of 60 employees from the company database. Based on the sample she calculates a 95% confidence interval for the mean time of empl… read more
Scott
Master's Degree
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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
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Suppose the owner of a fruit stand observes that in a sample
Suppose the owner of a fruit stand observes that in a sample of 32 customers, 50% purchase apples.(a) Find the lower limit of the 90% confidence interval for the proportion of all customers who purcha… read more
Sandhya_sharma
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Q3 Use the given data to find the minimum sample size
Q3Use the given data to find the minimum sample size required to estimate the population proportion. Margin of error: 0.05; confidence level: 99%; from a prior study, PHAT is estimated by 0.15. 17 339… read more
Sandhya_sharma
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Student Debt – Vermont: The average student loan debt of a
Student Debt – Vermont: The average student loan debt of a U.S. college student at the end of 4 years of college is estimated to be about \$22,300. You take a random sample of 131 college students in t… read more
Sandhya_sharma
Master's Degree
Master's Degree
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Sleep – College Students: Suppose you perform a study about
Sleep – College Students: Suppose you perform a study about the hours of sleep that college students get. You know that for all people, the average is about 7 hours. You randomly select 35 college stu… read more
Sandhya_sharma
Master's Degree
Master's Degree
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Pinworm: In a random sample of 830 adults in the U.S.A., it
Pinworm: In a random sample of 830 adults in the U.S.A., it was found that 80 of those had a pinworm infestation. You want to find the 95% confidence interval for the proportion of all U.S. adults wit… read more
Sandhya_sharma
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Master's Degree
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Looking to get some help with my stats homework. Heres a
Hey im looking to get some help with my stats homework … read more
Sandhya_sharma
Master's Degree
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
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Suppose that a random sample of 10 adult U.S. males has a
Suppose that a random sample of 10 adult U.S. males has a mean height of 70 inches with a standard deviation of 1.5 inches. If we assume that the heights of adult males in the U.S. are normally distri… read more
R.R. Jha
Bachelor's Degree
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A quality control engineer is interested in estimating the
A quality control engineer is interested in estimating the proportion og defective items coming off a production line. In a sample of 300 items, 27 are defective. Build a 90%conficence interval for th… read more
Ryan
Bachelor's Degree
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Let p be the population proportion for the following condition.
Let p be the population proportion for the following condition. Find the point estimates for p and q. In a survey of 1543 adults from country A, 641 said that they were not confident that the food the… read more
Math-John
30 satisfied customers
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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