Assume that a sample is used to estimate a population proportion p. Find the 90% confidence interval for a samle of size 158 with 75.3% successes. Enter your answer as a tri-linear inequality using decimals (not percents) accurate to three decimal places.

Q: Out of a sample of 600 adults aged 18 to 30, 162 still lived with their parents. Based on this,…

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Q: A research study reported a 95% confidence interval for the mean time of hip surgeries based on a…

A: Given  Sample size n=91  95% CI for population mean μ is  (116 minutes, 138 minutes).

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

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Q: Out of 100 people sampled, 77 had kids. Based on this, construct a 95% confidence interval for the…

A: We have to find 95% confidence interval for the true population proportion of people with kids.

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A: The given sample size is 370, sample mean is 15.9 and sample standard deviation is 9.7.

Q: Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval…

A: sample size(n)=133No. of successes(x)=68confidence level=98%sample proportion()=

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 300…

A: Critical Value: In test of hypotheses, Critical Values are the cut-off values that provide with the…

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A: Given information- Sample size, n = 832 Significance level, α = 0.20 Sample mean, x-bar = 47.3…

Q: Out of 400 people sampled, 240 had kids. Based on this, construct a 95% confidence interval for the…

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Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A:

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A:

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A: Solution: Let X be the reduction in systolic blood pressure. From the given information, x-bar=38.1,…

Q: A researcher is estimating the population proportion of US adults age 18 – 24 who have had an HIV…

A: Hi! Thanks for posting the question. Since there are more than three sub-part questions, we will…

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A: Critical value t* = 2.583 , x¯ = 33.7 , s = 13.3 , n = 737

Q: Out of 100 people sampled, 35 had kids. Based on this, construct a 95% confidence interval for the…

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Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

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

A: Given X=25 n=500 95% confidence interval

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: Researchers often create multiple 95% confidence intervals based on a given data set. For example,…

A: Level of Significance: In testing of hypothesis, Level of Significance is the probability of…

Q: 324 out of a simple random sample of 400 students hated their online math course. Find a 99%…

A: Given: Number of students that hated the online math course (y) = 324 Number of students (n) = 400…

Q: In a sample of 360 adults, 245 had children. Construct a 99% confidence interval for the true…

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Q: In a random sample of 500 Americans, 50% indicated that they have a cat for a pet. Estimate with 95%…

A: Given information

Q: Find the margin of error that corresponds to a sample of size 210 with 70% successes at a confidence…

A: Sample size is 210. Percentage of successes is 70%. Percentage of confidence level is 90%.

Q: 1. A survey of 425 randomly selected students at one university found that 300 students think that…

A: We have given that the sample size 450, favourable number of cases X=300, confidence level 95% and…

Q: A study of 156 oak trees found that 8.5% had a bark beetle infestation. Find a 95%…

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Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A: The degrees of freedom is, df=n-1=23-1=22 The degrees of freedom is 22. Computation of critical…

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A: Obtain the critical value: The level of confidence is 1- α = 0.95. The sample size is n = 276. The…

Q: Assume that a sample is used to estimate a population proportion p. Find the 90% confidence interval…

A: Given that  Confidence level (C) = 90% = 0.90 Sample size (n) = 271 Number of successes (x)  = 70…

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 100…

A: Solution a)  0.156<p<0.324 b)  p=0.240±0.084

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A: Given information- Sample size (n) = 391 Mean x̅ = 34.7 Standard deviation (s) = 14.5 Significance…

Q: Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 90%…

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Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 600…

A: Number of adult residents (n) = 600 Number of adults that has kids (x) = 102 Find z-critical value:…

Q: Out of 600 people sampled, 240 have shopped online. Based on this, construct a 90% confidence…

A: Find z-critical value:…

Q: An investment analyst collects data on stocks and notes whether or not dividend were paid and…

A: Given that: Pvice  No price  Tofal  increase  inclease 40751158748135127123250

Q: A surprising number of young adults (ages 19 to 25) still live in their parents' homes. A random…

A: Required conditions: n1>30 n2>30 n1*p1^>=10 n1*(1-p1^)>=10 n2*p2>=10 n2*p2^>=10

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A: Obtain the critical value: The level of confidence is 1- α = 0.98. The sample size is n = 335. The…

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A: Given: Sample mean, x = 38.8 Standard deviation, σ = 11.7 Sample size, n = 911 Level of…

Q: Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 99%…

A: Confidence interval: It is defined as the range which contains the value of true population…

Q: 10q3r1 (4) Body weight Bench press 148 145 176 148 154 133 189 156 181 166 217 174 210 168 150 139…

A: Given dataEnter the data in excel as shown below

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A: Sample size : n=625 Sample mean : x¯=39.5 Sample standard deviation : s=9.1 Confidence level :…

Q: A Gallup poll of 1487 adults showed that 43% of the respondents have Facebook pages.  Construct a…

A: Confidence Interval: In statistics, we can say a range of values of the specified population…

Q: Assume that a sample is used to estimate a population proportion p. Find the 80% confidence interval…

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Q: A recent survey showed that 42% of US employers were likely to require higher employee contributions…

A: The proportion of all companies likely to require higher employee contributions for health care…