Based on a sample of 34 randomly selected years, a 90% confidence interval for the mean annual percipitation In one city is from 47.5 inches to 50.5 inches. Find the margin of error. a) 0.42 b) there is not enough information to find the margin of error. c) 48.75 d) 1.5 inches e) 3 inches

Q: It was observed that 30 of the 100 randomly selected students smoked. Find the confidence interval…

A:

Q: (a) Compute a 95% confidence interval for u, the population mean self-rated estimate of how many…

A:

Q: Use the table for t distribution to determine the value of t to construct a confidence interval for…

A: Given, Confidence coefficient=0.90 i.e. α=1-0.90=0.10 n=15 Therefore, the degrees of freedom is…

Q: (b) Estimate the sample size needed if no estimate of p is available. A sample of elementary school…

A: From the provided information, Confidence level = 95% Margin of error = 0.06

Q: Use the given confidence interval to find the margin of error and the sample proportion. (0.704,…

A: The confidence interval for population proportion is given by (0.704, 0.732)

Q: (d) Compute a 95% confidence interval about the population mean difference u• The lower bound is The…

A: Given, From the data, d¯ = -2.238Sd = 1.888

Q: In a study of 480 households, 168 households were found to have 4 cell phones. Find a 95% confidence…

A: Given: x=168 n=480 p^=xn=168480=0.35

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A: Obtain the value of margin of error.   The value of margin of error is obtained below as follows:…

Q: An Article in the Journal of Sports Science (1987, Vol. 5, pp. 261-271) presents the results of an…

A:

Q: Use data given to find the minimum sample size required to estimate the population proportion.…

A: For a given margin of error, we want the sample to be sufficient enough, i.e for a desired margin of…

Q: 3. Use the t-distribution table to determine the value of t to construct confidence interval for the…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: According to a Gallup Poll taken in East Germany, when adults were asked whether they were thriving,…

A:

Q: In a study of government financial aid for college students, it becomes necessary to estimate that…

A: Note: Hey there! Thank you for the question. As you have posted multiple questions, we have helped…

Q: Use the given data to find the minimum sample size required to estimate a population proportion or…

A:

Q: Use the given data to find the minimum sample size required to estimate the population proportion.…

A:

Q: Determine the confidence level for confidence interval shown in the figure below.

A:

Q: According to a report an average person watched 4.55 hours of television per day in 2005. A random…

A:

Q: Use the given data to find the minimum sample size required to estimate the population proportion.…

A: Given Information: Margin of​ error: 0.03​ confidence​ level: 99% p is estimated by 0.13

Q: B. Construct a 95% confidence interval estimate of 4-4, the difference between the mean weight of…

A: Given Information: B) 95% confidence interval estimate of difference between the mean weight of…

Q: In a random sample of 85 automobile engine crankshaft bearings, 10 have a surface finish that is…

A: Given,sample size (n)=85sample proportion (p^)=0.12α=1-0.95=0.05α2=0.025Z0.025=1.96

Q: An Article in the Journal of Sports Science (1987, Vol. 5, pp. 261-271) presents the results of an…

A: The 95% confidence interval for population mean hemoglobin level will signify that, with 95%…

Q: An investigator has calculated a 95 percent confidence interval for a one-sample t test and found:…

A: The 95% confidence interval is obtained as (97, 105).

Q: a. Locate the​ 95% prediction interval for driving accuracy​ (y) on the​ printout, and give a…

A: a. The MINITAB output is given.

Q: 3. Use the given data to find the minimum sample size required to estimate the po proportion. Margin…

A:

Q: b) Construct the 99% confidence interval for the population mean duration of the longdistance calls…

A: Standard error(sample mean) Sample mean  Z alpha=0.01 = 2.58

Q: Construct a 95​% confidence interval estimate of the population proportion of adults who complained…

A: We have given that  n=3540  X=complained about dirty or​ ill-equipped bathrooms=1475 Y=complained…

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A: The formula of the margin of error using the confidence limits is, Where,   UCL denotes the upper…

Q: Use O The t Distribution Table to find the t2 value for an 80% confidence interval for the mean when…

A: Given Data : Sample Size, n = 14 confidence level , c = 80 % = 0.8

Q: Given that the population standard deviation is o = 1, determine the minimum sample size needed in…

A:

Q: Based on a sample of size 40, a 95% confidence interval for the mean score of all students, µ, on an…

A: we knows that,margin of error = Z a/2 * (standard error)confidence interval = x ± margin of…

Q: find the critical value z a/2 that corresponds to a 93% confidence level

A:

Q: (b) Use a 99% confidence interval to estimate the mean percent change in the population. FILE O…

A: (b) The mean percent is, x¯=∑xn=-4.7-2.5-4.9-2.7+⋯-5.147=-168.647=-3.5872 The mean percent is…

Q: Researchers investigating the new Johnson & Johnson COVID Vaccine selected a random sample of 200…

A:

Q: 1. Find the minimum sample size (n) you use to so that p is within a margin of error of 3% with a…

A: Sample size = sample size is the number of completed responses your survey receives or (randomly…

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A: Confidence interval is given, (0.619, 0.647)

Q: Find the critical value t α 2corresponding to a 99% confidence level, given that the sample has size…

A: Using t-table: Refer t-distribution table and look for t value corresponding to degrees of…

Q: According to the Central Limit Theorem (CLT), as sample size increases, the confidence intervals:…

A: The sample size is inversely proportion to standard error. If the sample size increases then the…

Q: use the given data to find the minimum sample size required to estimate a population proportion or…

A:

Q: Use the table for t distribution to determine the value of t to construct a confidence interval for…

A: Confidence level: A confidence level is the proportion of all possible samples that are expected to…

Q: 14. Find the sample size that will produce the maximum error of a 99% confidence interval for a…

A:

Q: 9. Find the minimum sample size needed to be within a margin of error of 2% of the population…

A:

Q: A confidence interval is calculated after running a two-sample z-test for proportions, yielding the…

A: Givenconfidence interval is [0.01,0.14]Upper Limit = 0.14Lower limit = 0.01

Q: In the SQF dataset, the sample proportion of the those stopped by police who are Black is 53%. The…

A:

Q: Use the table for t distribution to determine the value of t to construct a confidence interval for…

A: Given, Confidence coefficient: 0.90, and sample size, n = 10 degree of freedom  =n-1=10-1=9

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A: Let the confidence interval for population proportion is (a, b) Margin of Error : E =b-a2 Sample…

Q: a) Find a 90% confidence interval estimate for the mean college football score if a sample of 100…

A: a) Given data, σ=6n=100x=46z-value at 90% confidence is Zc=1.645

Q: Use the table for t distribution to determine the value of t to construct a confidence interval for…

A: Solution: From the given information, n=18 and confidence level is 0.99.

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A: