If you wish to estimate a population mean with a sampling distribution error SE= 0.34 using a 95% confidence interval and you know from prior sampling that o² is approximately equal to 3.5, how many observations would have to be included in your sample?

Q: A survey of women who are the main meal preparers in their households reported that 80% know that…

A: From the provided information, A survey of women who are the main meal preparers in their households…

Q: 2) Assume the p=.03 (3%). How large a sample is needed to estimate the proportion of breast cancer…

A:

Q: Suppose we have two normal populations denoted A and B, and we want to compare their population…

A: Let the sample variance of A be SA2, the according to question the variance of B will be…

Q: Suppose you have 67 samples with sample standard deviation 2.5. A 99% confidence interval for the…

A: The sample size n is 67.

Q: If you need to make a 98% confidence interval for a proportion, and the margin of error is to be no…

A: Given information:  Confidence level = 98% Margin of error (e) = 0.025 Let proportion (p) = 0.5 The…

Q: Suppose you take a sample of size 39 from a Normal distribution with unknown population mean and a…

A:

Q: If X=70​, σ=14​, and n=61​, construct a 99​% confidence interval estimate of the population​ mean,…

A:

Q: Find a 95% confidence interval for a mean, µ, where n = 324, x̄ = 2.7, s = .91, and se = .06.

A: Given: n = 324, x̄ = 2.7, s = .91, se = .06.

Q: 1) Assume the p=.03 (3%). How large a sample is needed to estimate the proportion of breast cancer…

A:

Q: If you wish to estimate a population mean with a sampling distribution error SE= 0.31 using a 95%…

A: The sample size needed is obtained below as follows : Obtain the area of probability in the right…

Q: A study quoted in The Windsor Star suggested that mathematics should be taught in the afternoon…

A: We have given that,  Confidence interval = 95 % and margin of error (B) = 0.06 Then,  We will find…

Q: If n=28, ¯x=46x¯=46, and s=7, find the margin of error at a 95% confidence level Give your answer…

A: Given,n=28x¯=46s=7degrees of freedom (df)=n-1=28-1=27α=1-0.95=0.05α2=0.025t0.025(27)=2.052   (from…

Q: For the following data, determine if it would be appropriate to find a confidence interval for the…

A: Proportion can be determined by dividing the total number of items in the survey by the number of…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: From the provided information, Margin of error (E) = 0.04 Confidence level = 90%

Q: All residents of Homer Glen, IL (N = 21,000). You want to estimate the mean age of each population…

A: Sample size n=7595% confidence level.

Q: Suppose that we wanted to estimate the true average number of eggs a queen bee lays with 99%…

A:

Q: How large would the sample need to be so that a 95% confidence interval would have a margin of…

A:

Q: By means of a pilot survey, it is already known that the proportion of residents in opposition to…

A: Formula for sample size is,

Q: (c) Suppose that the researchers wanted to estimate the proportion of patients under 50 years old…

A: Givenx=19n=356Margin of error(E)=0.03p^=xn=19356=0.0534Confidence interval = 95%

Q: You are trying to calculate a confidence interval to estimate a population mean. After performing…

A:

Q: If n=24, ¯x(x-bar)=37, and s=6, find the margin of error at a 98% confidence level Give your answer…

A: Margin of error is the sampling error in the sample. It is also defined as the number of…

Q: For a population of normally distributed scores, μ = 155 and σ = 12, approximately what would be the…

A:

Q: f you wish to estimate a population mean with a sampling distribution error SE= 0.28 using a 95%…

A:

Q: I am struggling setting this problem up. Any help would be greatly appreciated! For this…

A: As the information is said to be assumed, so I assumed some values.

Q: If you want to be 95% confident of estimating the population proportion to within sampling error of…

A:

Q: If you want to be 95​% confident of estimating the population proportion to within a sampling error…

A:

Q: Suppose you calculate a 95% confidence interval for a proportion to to be: 0.39 to 0.78. Determine…

A: Given,   Lower bound = 0.39​ Upper bound = 0.78   Here, we use to determine the margin of error.

Q: Suppose researchers are about to draw a sample of 1500 observations from a normally distributed…

A: Sample size, n = 1500 tα/2 = 0.46 We have to find the confidence level.

Q: What proportion of Law School applicants are accepted into Law School? In a survey of a random…

A: According to the given information in this question  We can say that the We are 95% confident the…

Q: We want to determine if the true proportion of students who do aerobics is less than 45%. Which are…

A: Suppose P is the true proportion of students who do aerobics.

Q: Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years…

A: p = 0.5 Margin of error = 0.01

Q: Suppose a certain Statistics instructor wants to estimate the proportion of students who enjoy…

A: since estimate for proportion is not known therefor we take p⏞=0.5 margin of error=E= 0.03 level of…

Q: For a sampling distribution of n = 500 and population proportion of 0.48 of those who prefer cookies…

A: n = 500 p = 0.48

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

A: