A researcher wants to estimate the impact prenatal care during pregnancy can have on anemia rates in pregnant mothers by conducting a retrospective case-control study on new moms. If the prevalence of anemia is approximately 39.7%, how many individuals should the researcher recruit to participate in the study if the researcher wants to be 95% confident that the margin of error is no more than 3.0%? Group of answer choices n total = 2044; n control group = 1,022; n case group = 1,022 n total = 2044; n control group = 812; n case group = 1,232 n total = 4088; n control group = 1,623; n case group = 2,465 n total = 4088; n control group = 2,044; n case group = 2,044

Q: Would you expect the F-ratio of an independent-samples ANOVA using the same data to be the same,…

A: Introduction: Repeated measures ANOVA or repeated measures analysis of variance is a parametric…

Q: What sample size should be obtained if he wants to be within 4 percentage points with 95​%…

A: Given that the margin of error is 4 percentage points. That is, ME=4%=0.04 Confidence level =95% The…

Q: When 99% confidence interval is calculated instead of a 95% confidence interval with the same sample…

A:

Q: What confidence interval will have the larger margin of error when using the same sample data and…

A: Since we know that, Confidence interval = the estimate ± the margin of error Margin of error is…

Q: The Chancellor wants you to calculate a second sample size after sample 1 produced a 40% response…

A: From the provided information, Confidence level = 80% Margin of error (E) = 7% that is 0.07 Sample…

Q: According to the American Cancer Society, in 2016 10.7% of the U.S. working population commute to…

A: From the provided information, In 2016, 10.7% of the U.S. working population commute to work by…

Q: A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many…

A: The formula for the sample size is as follows:

Q: 20 out of 200 men randomly selected in a region and 30 out of 300 women are against vaccination.…

A: From the provided information,

Q: How strong should you build a nuclear reactor? You need it to withstand earthquakes, but there is a…

A: Given: Define, X:Number of high magnitude earthquakes per year.µ0=4Sample mean(x¯)=1.25Sample…

Q: When a null hypothesis is rejected, the test is said to be "statistically significant." If a…

A: Here Given  When a null hypothesis is rejected, test is said to be "statistically significant

Q: Under what circumstances would a t-test be the appropriate method of statistical analysis? Give an…

A: A t-test is one of the most important methods in statistical analysis.

Q: A researcher is studying the effect of using fibers and different water ratios on the strength of…

A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have…

Q: According to researchers, the mean length of imprisonment for motor-vehicle-theft offenders in a…

A: Givensample size(n)=100Mean(x)=15.9standard deviation(σ)=5.0significance level = 5%

Q: 9. In Brooklyn, on average nearly four-fifths of residents (79.86%) have a first dose of their COVID…

A: Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: Cadmium, a heavy metal, is toxic to animals. Mushrooms, however, are able to absorb and accumulate…

A: The data shows the cadmium concentration of edible mushroom of 12 sample are given.

Q: What is the impact on the confidence interval estimate if a larger sample is used?

A: Confidence interval:

Q: What is the t-value for a 95% confidence interval given that the sample size is 16? Write the exact…

A: Given: confidence level =95%  Sample size n=16  Then degree of freedom for t-test is =n-1  To find…

Q: The national rate of breast cancer among women aged 50-54 is 221 per 100,000. #Based on data from a…

A: This code requires to calculate the sample size for effect sizes of 275, 300, 350, and 400 per…

Q: The Congressional Budget Office reports that 36% of federal civilian employees have a bachelor's…

A: Note:Thank you for posting the question! Since your question has more than 3 parts, we have solved…

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

A:

Q: Estimate the Odds ratio, with an associated 95% cI, for the association between exposure to fuel and…

A: Formula of Odds Ratio= For the 2x2 contingency table, Odds Ratio= ad/bc= 56*623/23*253= 5.9955

Q: students. You want to estimate the proportion p of students who never floss with 90% confidence and…

A: It is given that Proportion p = 0.27 Margin of error E = 0.03 Level of confidence = 90% The critical…

Q: Given sensitivity is 0.88, specificity is 0.95, and prevalence is 0.07, find the positive predictive…

A: It is required to find the positive predictive value, and negative predictive value, using…

Q: How large a sample is necessary to estimate the true proportion of unmarried Canadians aged 25-29…

A: Given data: Margin of error  = 5% = 0.05 Confidence level  = 0.90 To find: Sample size (n) = ?

Q: An exterminator claims that no more than 10% of the homes he treats have termite problems within 1…

A:

Q: For a random sample of 48  professional soccer games, the variance of total points was 7.3 points.…

A: Sample size, Sample variance,  points. Confidence level,

Q: What should your sample size be if you want a confidence level of 90 percent and a margin of error…

A: We want to find the sample size (n)

Q: Does this mean that the diagnoses are reliable? Explain your position. How does reliability affect…

A:

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: If the company sells the candy bars in packs of 4 bars, what can we say about the likelihood that…

A:

Q: We want to investigate whether Ozone values differ across months as measured.   State the null and…

A: Given, We want to investigate whether Ozone values differ across months as measured.

Q: The p-value to test if Education is a significant predictor (previous question) is approximately 0…

A: From the given information, the p-value to test if Education is a significant predicator is about 0.

Q: 2.) Does the type of prenatal care affect a baby's birth weight? Researchers compared the birth wei…

A: The following information has been provided:   Group 1 = No Parental care Group 2 = Over the…

Q: A study of scat belt users and nonusers yielded the randomly selected sample data summarized in the…

A: Note: Since part A is only posted. The answer will be given for the posted question. Please provided…

Q: 3. A researcher suspects that the actual prevalence of generalızed anxiety amony adolescents is…

A: Denote p as the true proportion of the prevalence of generalized anxiety among children and…

Q: How can we interpret a 95% confidence interval?

A: How to interpret a 95% confidence Interval?  We know that,  Confidence Interval is defined as the…

Q: earcher wants to determine the proportion of elm trees in Windsor, Ontario, dying of Dutch elm…

A:

Q: Question 1 Are teacher evaluations independent of grades? Affter midterms, a random sample of 284…

A: The hypothesis are  H0:teacher evaluation are independent of mid term grades H1:teacher evaluation…

Q: a case-control study looking at metabolic dysfunction during adolescence and stroke in obese adults…

A: Given: Type I error α=0.05 Power of the test is 0.90 Odds ratio OR=2.5 Prevalence of stroke in those…

Q: Your state is considering raising the legal age for consumption of alcohol beverages. How large a…

A: From the provided information, Margin of error (E) = 0.01 Confidence level = 99%