Part 2 of 2 (b) Estimate the sample size needed if no estimate of p is available. A sample of 787T adults is needed to obtain a 99.8% confidence interval with a margin of error of 0.05.

Q: According to a report on sleep deprivation by the Centers for Disease Control and Prevention, the…

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Q: Calculate the 95% and 99% population proportion confidence intervals for this finding.

A: Answer: Given that  the random sample of 100 people  n=100  r=74 The test statistics for population…

Q: Suppose a different police department says their SRS resulted in a 95% confidence interval of 10.1%…

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Q: Calculate the minimum sample size required in order to make a 95% confidence interval for a…

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Q: Suppose we know that a confidence interval is (27,35), with a margin of error of 4. Find the sample…

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Q: Determine the value of z, that would be used in constructing a 90%confidence interval for a 2.…

A: Z = x-μσ, Where μ = population mean,           σ = population variance,           x = observed…

Q: Suppose you observe 77 data points from a distribution with standard deviation 8.4, and you…

A: Given that,  σ=8.4,n=77 Critical values: By using the z-table, the critical value at 92% confidence…

Q: Suppose a sample of 30 Statistics students are given an IQ test. If the sample has a standard…

A: Given n=30, sample standard deviations s=12.23

Q: What is the talpha/2 value to use for calculating a confidence interval from a sample of size 45…

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Q: If a 90% confidence interval for the difference of means μ 1 − μ 2 contains all negative values,…

A: The mean of first population is denoted as μ1 and mean of second population is denoted as μ2.

Q: What is the minimum required sample size to make a 97% confidence interval for a population…

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Q: In one of the studies, it was found that, in a random sample of 261 married persons, 135 were…

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Q: Part 3 of 4 (c) Find the 90% confidence interval of the mean number of jobs. Round intermediate and…

A: Given,sample size(n)=55sample mean(x¯)=7.3population standard deviation(σ)=1.8

Q: Find the margin of error for the confidence interval of population proportion. Lower bound  0.135.…

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Q: It is believed that large doses of acetaminophen (the active ingredient in over the counter pain…

A: Given that  Margin of error =E =0.03 98% confidence interval.

Q: Suppose that you will be taking a random sample from a population and that you intend to find a 95%…

A: Solution: The confidence interval for the population mean is calculated by using the following…

Q: A large trucking company wants to estimate the proportion of its trailer truck population with…

A: Solution: From the given information, n=200, p-hat is 0.30 and the confidence level is 0.90.

Q: Determine the 99.5 percent confidence interval that contains the population variance if the sample…

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Q: A consumer watchdog organization estimates the mean weight of 1-ounce "Fun-Size" candy bars to see…

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Q: Identify the t-score for a 90% confidence interval if the sample size is 31. t =

A: c1=90%n=31α=1-0.90=0.10df=n-1=31-1=30

Q: Seventy-three percent of a sample of 1000 students drive a used car as opposed to a new car or no…

A: Given: Proportion  = 73 % Confidence level  = 80 %

Q: Health Care Knowledge Systems reported that an insured woman spends on average 2.3 days in the…

A: Given: n1=n2=16, x1=2.3, x2=1.9, s1=0.6, s2=0.3 The 99% confidence interval for the differences of…

Q: The researchers of a study wish to compare the proportion of participants in two samples that…

A: From the provided information, Confidence level = 95% Margin of error = 0.3

Q: You measure 20 dogs' weights, and find they have a mean weight of 44 ounces. Assume the population…

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…

Q: Suppose that you have obtained data by taking a random sample from a population and that you intend…

A: 95% percent confidence interval will give more accurate estimate of µ than 99% confidence interval.…

Q: In a sample of 1901 patients who underwent a certain type of surgery, 22% experienced complications.…

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Q: An investigator computes a 95% confidence interval for a population mean on the basis of a sample of…

A: To find half of width, We need to calculate 4 times the sample Size.

Q: 5, Randomly selected middle-aged people in both China and the United States were asked if they…

A: For China, n =1300 and x = 1170 therefore p^1 =11701300 = 0.9 For USA,  n = 150 and x =110 p^2…

Q: When 328 college students are randomly selected and surveyed, it is found that 122 own a car. Find…

A: We want to find 95% CI for population proportion (p)

Q: Calculate a two-sided 95% confidence interval for the population mean. b) In addition, predict the…

A: Given: The sample values given is as follows 24 28 27.75 27 24.25 23.5 26.25 24…

Q: Suppose you survey a random sample from a large population. How large must your sample be if you…

A: According to the provided data, the margin of error is 0.06 and the confidence level is 0.98. Since,…

Q: A political candidate is anxious about the outcome of the next election. To have his next survey…

A: A political candidate is anxious about the outcome of the next election. To have his next survey…

Q: Identify the y-score for a 95% confidence interval if the sample size is 15.

A: The confidence level is 0.95.

Q: An article in the journal of bone and joint surgery suggested that approximately 8% of such…

A: The percentage of bone and joint surgery suggested in article is 8%, and the margin of error is 4%.…

Q: identify the t-score for a 90% confidence interval if the sample size is 31.        t=

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Q: Taking a random sample of 35 individuals waiting to be serviced by the teller, we find that the mean…

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Q: A survey of 80 recent arcanum students showed that 46 were ready for summer break. Find the 95%…

A: Obtain the 95% confidence interval for the true proportion of students ready for summer break. The…

Q: A 95% confidence interval is constructed in order to estimate the proportion of adults who own an…

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Q: It is known that the population range equals 60. With a 95% confidence level, the sample size that…

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Q: 6. A hospital wants to estimate the proportion of patients who needed a second visit with a 95%…

A: Here use formula of Margin of error for finding n sample size

Q: Michael wants to make a confidence interval estimate for the proportion of community members in…

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Q: What is the minimum required sample size to make a 96% confidence interval for a population mean if…

A: Margin of error=E=2 Standard deviation=σ=12 96% confidence interval  E=Zc×σ/√n n=sample size

Q: Suppose a 90 percent confidence interval to estimate a population proportion was calculated from a…

A: The confidence interval for proportion can be calculated as follows:

Q: It is believed that large doses of acetaminophen (the active ingredient in over the counter pain…

A: (a) Given that, Critical value: Using the z-table, the critical value at 95% confidence level is

Q: What is the formula for CONFIDENCE INTERVAL (CI) FOR μ1 – μ2 (TWO INDEPENDENT SAMPLES)?

A: From the given information, consider two independent samples drawn randomly with sample sizes n1 and…

Q: Suppose you compute a confidence interval with a sample size of 37. What will happen to the…

A: If the sample size increases from 37 to 70 then, the margin of error of the confidence interval…

Q: What is the smallest sample size that guarantees that the margin of error is less than 3% when…

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Q: According to a report on sleep deprivation by the Centers for Disease Control and Prevention, the…

A: Given that  p^1=7.8%=0.078p^2=8.7%=0.087n1=11937n2=4892p^=n1p^1+n2p^2n1+n2=0.0806 Confidence…

Q: Suppose that a state wants to access the public opinion on the proposal that drivers who are 65…

A: Given, Margin of error (MOE)= 0.025   p =probability of success= 0.5

Q: Suppose that based on a random sample, a 95% confidence interval for the mean hours slept (per day)…

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