) Find the 99% confidence interval (CI) and margin of error (ME) used to estimate the population proportion for a clinical test with 175 subjects when p ̂=72% showed improvement from the treatment. Interpret your result

Q: Suppose you want to produce an estimate on the percent of students who return to college after their…

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Q: Explain in what situations you can use the z statistic to construct a confidence interval for the…

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Q: Several years ago, 36% of parents who had children in grades K-12 were satisfied with the quality of…

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Q: There are many reasons adults use credit cards. A recent survey found that 66% of adults used credit…

A: 66% of adults use credit cards for convenience.Confidence level is 99% i.e., 0.99.Margin of error is…

Q: A random sample of 230 people living in Seattle found that 83 of them had a pet. A random sample of…

A: Solution: Given information: n1= 230 Sample size of people iving in Seattle n2= 172  Sample size of…

Q: Students at Green River plans a study to stats Test scores. Previous research has shown the…

A: We have given that  Margin of error =E =0.5 Population Standard deviation = 1 99%confidence…

Q: The Chancellor wants you to calculate a second sample size after sample 1 produced a 40% response…

A: From the provided information, Confidence level = 80% Margin of error (E) = 7% that is 0.07 Sample…

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: What is the t-value for a 95% confidence interval given that the sample size is 16? Write the exact…

A: Given: confidence level =95%  Sample size n=16  Then degree of freedom for t-test is =n-1  To find…

Q: How does the sample size and percentage of confidence influence the width of a confidence interval?

A: We have to define effect on width of C.I.

Q: Suppose you wanted to take another sample of dogs to find a 90% confidence interval of young dogs to…

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Q: You plan to conduct a survey to find out the proportion of students who enjoy taking classes…

A: Given  The margin of error is given as m=0.02 At a 90% confidence interval, α=0.1 As the proportion…

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 500…

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Q: What is the impact of changing from the 95% confidence interval to the 90% confidence interval? The…

A: Confidence Interval Confidence Interval refers to the range of the value that we expect our estimate…

Q: What proportion of your confidence intervals include the true population mean? Is this proportion…

A: Consider a confidence interval of 95%. That is, the proportion that the confidence interval will…

Q: Sales of trumpets in a day is modeled as Normal. A random sample of 36 days is looked at. The sample…

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Q: Construct a 99% confidence interval to assess whether this represents evidence that parents'…

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Q: 20. OxyContin The drug OxyContin (oxycodone) is used to treat pain, but it is dangerou because it is…

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Q: A sample of 700 from population A has a proportion of interest of 0.24 while a sample of 600 from…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: Estimate 95% confidence interval for the proportion of household experiencing burglary in 2010."

A: 25.8 households per 1,000 were the victims of home burglary. These data are obtained from a survey…

Q: A researcher wanted to compare the percentages of men and women who play the lottery.  They randomly…

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Q: Determine tc for n = 15 and a confidence level of 99%.

A: From the given information, Sample size (n) =15, Confidence level (1-α)= 0.99 Thus, the t-critical…

Q: You have 16 vampire bats. These bats have a population variance of 3.4 ounces. You wish to make a…

A: Given: Sample size (n) = 16 Population variance σ2=3.4 Sample mean x¯=15.20 Confidence level = 0.950

Q: The police department wants to reduce the margin of error for their 95% confidence interval. If they…

A: Here Given  The police department wants to reduce the margin of error for their 95% confidence…

Q: If n = 530 and X = 424, construct a 99% confidence interval for the population proportion, p. Give…

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Q: We plan to sample parents in order to construct a 99% confidence interval for the proportion who…

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Q: If N=480 and p̂ (p-hat) =0.88, find the margin of error at a 95% confidence level.

A: From the provided information, Sample size (n) = 480 p̂ (p-hat) =0.88 Confidence level = 95%

Q: If n = 100 and p̂ (p-hat) = 0.4, construct a 95% confidence interval.

A: To find the 95% confidence interval for the population proportion. Given that,…

Q: Several years ago, 43% of parents who had children in grades K-12 were satisfied with the quality of…

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Q: What is the effect on a confidence interval if one decreases both sample size and the level of…

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Q: 13 <p<0.463 und to three decimal places as needed.) Vrite a statement that correctly interprets the…

A: Note : As per the student requirement solving only d.  The confidence interval interprets that there…

Q: Several years ago, 46% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given  p=0.46, n=1055, X=488

Q: Find the margin of error for the​ 99% confidence interval used to estimate the population…

A: The random variable X follows normal distribution. The sample size is 1100. The proportion value is…

Q: A psychologist asked a random sample to complete a depression questionnaire. On average, children…

A: We assume the population is normally distributed.

Q: Treating the 2015 Tobacco rate data as a sample, construct a 95% confidence interval for the mean…

A: As per guidelines we will solve first question only, please repost other questions for more answers.…

Q: What is the multiplier for an interval that estimates the proportion with  a. 88% confidence?  b.…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: You are comparing men and women on hours spent watching TV. You pick a sample of 12 men and 14 women…

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Q: A soft drink company surveys 500 shoppers and finds that 61% of shoppers prefer diet soda to regular…

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