an of a business school wanted to know whether the graduates of her school used a statistical inference technique during their first year of employment after graduation. She surveyed 314 graduates and asked about the use of statistical techniques. After tallying up the responses, she found that 204 used statistical inference within one year of graduation. Estimate with 90% confidence the proportion of all business school graduates who use their statistical education within a year of graduation.

Q: The test is used to test hypotheses associated with enumerated, categorized data. This test is used…

A: The objective is to determine the appropriate test, which involves enumerated categorized data.…

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Q: researcher claims that not more than 65% officers in the public offices come on time in their…

A: From the provided information, Sample size (n) = 65 From which 45 officers were in time that is x =…

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Q: Women athletes at the a certain university have a long-term graduation rate of 67%. Over the past…

A:

Q: It is believed that 10% of the children enrolled in the elementary schools are left-handed. Suppose…

A:

Q: Out of a random sample they found that 9.72% of the parts lengths was more than 7.4 inches and 7.78%…

A: Let X be the random variable such that the length of the part. It is known that the length of the…

Q: A credit score is used by credit agencies (such as mortgage companies and banks) to assess the…

A: Given Mean=702.5 Standard deviation=84 3 n=39

Q: A credit score is used by credit agencies​ (such as mortgage companies and​ banks) to assess the…

A: Denote μ as the true mean credit score.

Q: A credit score is used by credit agencies (such as mortgage companies and banks) to assess the…

A: From the provided information, Sample size (n) = 42 Sample mean (x̅) = 719.2 Standard deviation (s)…

Q: A software company is interested in improving customer satisfaction rate from the 80% currently…

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A:

Q: A marketing survey involves product recognition in New York and California. Of 37 New Yorkers…

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Q: How large a sample is necessary to estimate the true proportion of unmarried Canadians aged 25-29…

A: Given data: Margin of error  = 5% = 0.05 Confidence level  = 0.90 To find: Sample size (n) = ?

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A:

Q: The IRS is interested in estimating the total number of tax accounts who has their own tax returns…

A: A random sample of 100 returns showed that 15 were audited; n=100 x=15 α=0.95

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A: Given information Population mean µ = 707.6 Sample size (n) = 43 Mean x̅ = 718.3 Standard deviation…

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A: One sample t-test: One sample t-test is used to test the significance difference between population…

Q: (a) State the null hypothesis H and the alternative hypothesis H₁. Ho :O H₁:0 (b) Determine the type…

A: Given, n1=10, n2=10, σ1=6400 and σ2=6600 Level of significance=0.10

Q: A credit score is used by credit agencies (such as mortgage companies and banks) to assess the…

A: Given that ; u = 700.4 Sample mean = 716.2 n = 34  s = 81.1 Here we use one sample mean test to…

Q: A credit score is used by credit agencies (such as mortgage companies and banks) to assess the…

A: Let us consider a population follows a normal distribution Let a sample be taken from that…

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A: Sample size n =196 Favorable cases x =126 Sample proportion p^=x/n  =126/196 =0.6429

Q: A recent study indicated that 18% of people free from cardiovascular disease were considered obese.…

A:

Q: A recent article published by the Wall Street Journal said the Cincinnati airport had the most…

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Q: A prognosticator makes 700 predictions regarding the outcomes of football games, and is correct with…

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Q: A simple random sample of 300 men included 71 who smoke, and a simple random sample of 310 women…

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A: Given data is6.5,4,3.5,0,12,5,12,15,12,0,1,8,0.5,2,7sample size(n)=15Confidence…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.