A 90% confidence interval for p=0.37 and n=475

Q: A sample of 16 overweight people uses a new reducing pill for 6 weeks and has a mean weight loss of…

A:

Q: A random sample of 121 observations has a mean of 23, a median of 24, and a mode of 25. The…

A:

Q: The U.S. Department of Labor and Statistics released the current unemployment rate of 5.1% for the…

A:

Q: If n = 526 and (p - hat )= 0.30, find the margin of error at a 98% confidence level

A: n=526 Confidence level =98% (p - hat )= 0.30

Q: The standard deviation of the running time of a sample of 200 fuses was found to be 100 hours. Find…

A:

Q: Find the critical value z α 2corresponding to a 86% confidence level.

A:

Q: given n=31 , s=7, Xbar= 14 for an 80% confidence interval find,  standard error margin of error

A: From the given information, the sample size is n=31, the sample mean is x-bar=14 and the sample…

Q: A random sample of 35 scores from the Gen Math examination of ABM learners is taken and gives a…

A:

Q: How large of a sample is required for a poll to have an error of less than 1.2% at a 90% confidence…

A: Given that  Margin of error =E =1.2%=0.012 90% confidence level.

Q: If n=40, x =39 and s=15, construct a confidence interval at a 99% confidence level. Assume the data…

A: Answer: From the given data, sample size(n) = 40 mean(x-) = 39 standard deviation (S) = 15 99%…

Q: Suppose we want to estimate the average weight of an adult male in a certain county. A random…

A:

Q: If a researcher found that the margin of error =0.9 and the sample mean from the study was 17.7,…

A: Given, A researcher found that the margin of error ME  = 0.9 and  The sample mean u = 17.7 Find the…

Q: We take a sample of 50 people and obtain a sample mean of 147 pounds with a standard deviation of 15…

A: We have given that  Sample size n = 50 Sample mean = 147 Standard deviation = 15 90%confidence…

Q: How large of a sample is required for a poll to have an error of less than 1.5% at a 95% confidence…

A: Given:

Q: For a sample 1000 app users, the research team reports an average age of 39. If the population…

A: given data  n = 1000 x¯ = 39σ = 9.590% ci, upper bound of ci  = ?

Q: Construct an 80% confidence interval for the average quantity of water consumed at a coffee on the…

A: It is given that  Sample mean, x̄ = 52.1 Sample standard deviation, s = 4 Sample size, n = 50…

Q: In a sample of 40 water specimens taken from a construction site 26 contained detectable level of…

A: According to the provided information, sample size (N)=40 number of favorable cases (X) = 26 The…

Q: Q. No. 3. Forty-two items are randomly selected from a population of 500 items. The sample mean is…

A: It is given that, sample mean (x) = 40 Sample standard deviation (s) = 9 Sample size (n) = 42…

Q: If n=160 and ˆp (p-hat) =0.48, find the margin of error at a 99% confidence level

A: Given Data: p^=0.48n=160   We know that, p^-pp^(1-p^)n~ Normal(0,1)

Q: Za/2 for the 99% confidence interval Za/2 Part 5 of 5 for the 94% confidence interval Za/2

A: Given99% confidence interval:-

Q: n=41n=41 data values randomly selected from a normally distributed population has standard deviation…

A: Given that  Sample size (n) = 41 Sample standard deviation (s) = 6.4 Confidence level (C) = 99%…

Q: Sample size plays a role in determining the length of a confidence interval. Consider two 95%…

A: Solution:  The length of confidence interval is depend on the sample size. The length of confidence…

Q: Recent data from a national survey indicated that the average woman goes to a salon once every five…

A: We have given that the average woman goes to a salon once every five weeks and spend on average…

Q: In a previous study, it was found that p-hat=0.68 for a particular sample. Suppose we would like to…

A:

Q: Below is a 85% confidence interval for a population mean from a sample of size 62 with sample mean…

A: Given that  Sample mean (¯x) = 5.9 Sample size (n)  = 62 85% Confidence interval = (5.6 , 6.2) We…

Q: a 90 percent confidence interval for a population mean indicates that

A: Given problem Given that     a 90 percent confidence interval for a population mean indicates…

Q: A random sample of 87 airline pilots had an average yearly income of $99,400 with a standard…

A: From the given information, the sample mean is 99,400, standard deviation is 12,000 and sample size…

Q: If n=21n=21, ¯xx¯=49, and s=17s=17, construct a confidence interval at a 99% confidence level. Give…

A: The summary of statistics is, n=21,x¯=49, s=17 The degree of freedom is, df=n-1   =21-1   =20…

Q: Find 80%, 85% and 99.9% confidence interval for the sample mean of a pouplation, if we know that in…

A: Given information: Sample mean=60 Standard deviation =5 Sample size=70

Q: For a given sample, a 50% confidence terval for the population mean is narrower than a 90%…

A: For  a given sample size and population standard deviation, the interval estimation of the…

Q: A student conducted a test to see if people preferred one of two possible new logos for UF, one with…

A: Confidence interval is a technique of estimation.

Q: Give a 99% confidence interval, for µ₁ −µ2 given the following information. n1 n₁ = 50, x1 = 2.03,…

A: Given: x¯1 = 2.03s1 = 0.4n1 = 50x¯2 = 2.52s2 = 0.98n2 = 45

Q: A survey of 1,000 US adults was conducted to determine whether they believe raising the minimum wage…

A: From the given information the 99% confidence interval was ( 0.443, 0.411)

Q: in a study of 150 randomly selevted accidents that required treatment in and ER 36% involed children…

A:

Q: Construct the confidence interval for the population mean c=0.98 X=9.5 o=0.5 n=54

A: Given:  mean c=0.98  X bar=9.5  o=0.5 n=54 A=1-0.98=0.02

Q: If a school district takes a random sample of 56 Math SAT scores and finds that the average is 445,…

A: n=56SAT score :x¯=445σ=100CI=0.99for 99% confidence interval…

Q: Find the probability that two or more of 20 independent 95% confidence intervals does NOT contain…

A: It is an important part of statistics. It is widely used.

Q: Given a confidence interval  (0.08, 0.22),  what is the margin of error?

A: The confidence interval is (0.08, 0.22).

Q: Construct a 95% confidence interval for the population standard deviation σ if a sample of size 10…

A: Solution

Q: A 95% confidence interval for the mean body mass index (BMI) of young American women is…

A: A (1-α)% for the population mean tells us that we are (1-α)% confident that the confidence interval…