An educator was trying to determine the effect of remote learning on middle school aged children. They randomly selected 250 students who spent a full year with in person learning and 190 of them showed similar or improved scores on a set of metrics. They also randomly selected 350 student who spent the year remotely learning and 252 of them showed similar or improved scores. a. Construct a 95% confidence interval for the difference of proportions? b. Based on the confidence interval can you conclude there is a difference between the two groups?

Q: In a random sample of 100 men in the United States, 55 of them were married. Using a 95% confidence…

A: We have given that,  Sample size (n) = 100 and favorable cases (X) = 55  Then,  We will find the 95…

Q: given certain level of significance, what is the relationship between the confidence interval and…

A: Margin of error: Margin of error is a range of values that lie above and below the sample statistic…

Q: You read in a U.S. Census Bureau report that a 90% confidence interval for the median income in 2012…

A: It is given that 90% confidence interval for the median income in 2012 of American households was…

Q: A research group studying cell phone habits asked the question “Do you ever use your cell phone to…

A:

Q: Question 1

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

Q: In a random sample of 810 women employees, it is found that 81 would prefer working for a female…

A:

Q: Campus athletics is interested in the proportion of registered students living on campus who play…

A: We are given that 95% confidence interval is correctly calculated from the given data as (0.12,…

Q: a. How many of the 3039 subjects used at least one prescription medication? (Round to the nearest…

A: Given : Total sample size of the survey  = 3039 Out of the sample, proportion of people who have…

Q: A researcher wants to construct a 98% confidence interval for the proportion of elementary school…

A:

Q: Anna's project for her introductory statistics course was to compare the selling prices of textbooks…

A: Confidence interval:Step-by-step procedure to find the confidence interval using MINITAB…

Q: An environmental science teacher at a high school with a large population of students wanted to…

A: The 95% confidence interval for the proportion of all students at the school who would respond yes…

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: 2. This problem uses the same data (listed below) College financial aid offices expect students to…

A: Solution: Given information: n1= 675   Sample size of males n2= 621   Sample size of females x1=…

Q: Which of the following is not an alternate term for confidence interval? O Level of confidence O…

A: Introduction: It is required to identify the term that is not an alternative term for confidence…

Q: Answer the following short questions related to samples and sampling distributions: (a) If a given…

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Q: In a situation where the sample size was decreased from 39 to 29 in a normally distributed data set,…

A: Confidence interval formula is given by

Q: how many people should you sample? 4 80 125 382 383

A: Given : Margin of error: ME = 0.05

Q: Given certain level of significance, what is the relationship between the confidence interval and…

A: We want to know that relationship between confidence interval sand sample size.

Q: The International Nanny Association (INA) reports that in a sample of 928 in- home child care…

A: Solution: A. Let X be the number of number of nannies who have passed the INA certification exam and…

Q: Which of the following would result in the narrowest confidence interval? A. 80% confidence level…

A: The narrowest confidence interval will result from larger sample size and a smaller confidence…

Q: For a confidence level of .90, what is the significance level?

A: We have find significant leval..

Q: A sample of 14 commuters in Cebu showed the average of the commuting times was 33.2 minutes. If the…

A: GivenSample size (n) = 14SD(s) = 8.3 minutesaverage (x) = 33.2 minutes 95% confidence interval.…

Q: The effectiveness of a weight loss program is to be evaluated by measuring the weight of eight…

A: Obtain the 95% confidence interval for the mean difference. The 95% confidence interval for the mean…

Q: Construct a 95% confidence interval for the true average age of customers. b. Suppose this interval…

A: A survey of 25 randomly selected customers found following ages as: 25, 30, 38, 25, 35, 32, 30, 22,…

Q: In a four-year psychedelic-mushroom experiment, 93 of the 300 subjects reported experiencing “strong…

A: Given information- We have given that 93 of the 300 subjects reported experiencing “strong or…

Q: Using the accompanying colleges and universities data to find 95% confidence intervals for the…

A: Given:   Liberal Arts Colleges Research Universities 1169 1117 1194 1133 1204 1148 1210…

Q: A researcher asks 600 people if they received a flu vaccine, and 65% said they did. What is the 95%…

A: From the provided information Sample size (n) = 600 65% said they received a flu vaccine that is…

Q: : A study was done to compare the effectiveness of distance learning with traditional classroom…

A: Given that

Q: A SURVEY WAS CONDUCTED IN 2010 AND 2020. THE 2010 RESULTS SUMMARIZED THE RESPONSES OF 1250…

A: Confidence interval are used to measure the range where the population proportion lies. It is…

Q: What proportion of OSU students earn their undergraduate degrees in four years? A college…

A:

Q: If the mean flying time for a sample of 65 pilots was 15.6 hours per month, and the population…

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Q: A researcher computed a 90% confidence interval for the proportion of students who smoke. If the…

A: False. Relationship between confidence level and error:The error value increases when the confidence…

Q: 12. Which of the following values falls outside of the confidence interval? Mean number of students…

A: From the provided information, The confidence interval is 28.4±3.7

Q: A market analyst is curious what proportion of Los Angeles residents have a landline telephone. A…

A: Given that, A survey of 200 randomly selected Los Angeles residents shows that 96 of those selected…

Q: What Z score would be used to construct a 90% confidence level? Is it ... a. 1.65 b. 2.33 c.…

A: Confidence Level = 90 Significance Level = α = (100-90)% = 0.1 Critical value = z* = 1.65   […

Q: n our Condor Cafe, the Oxnard College Culinary Program offers the most delicious and affordable…

A: Given that, n=255,x=75

Q: An environmental science teacher at a high school with a large population of students wanted to…

A: Given information: To obtain a potentially less biased estimate of the proportion, a statistics…

Q: An environmental science teacher at a high school with a large population of students wanted to…

A: Question : (b) Given the method used by the environmental science teacher to collect the responses,…

Q: As the sample size gets smaller, what happens to the width of your confidence interval? O Wider /…

A: A confidence interval is an interval with a certain probability that a parameter will fall between…

Q: If a confidence interval for the mean is (38≤μ≤89)(38≤μ≤89), a) What is the point estimate?    b)…

A: Given,   Lower bound = 38​ Upper bound = 89

Q: If a class took an exam and scored a mean of 82 with a standard deviation of 12, what would be the…

A: Given, Mean(x)=82Standard Deviation(s)=12

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A: It is given that a simple random sample of 339 people living in East Vancouver and finds that 40…

Q: If a confidence interval for the mean is (43≤μ≤82)(43≤μ≤82), a) What is the point estimate?    b)…

A: Given the confidence interval for the population mean in tri-linear inequality form: Hence,

Q: Using your answers to parts (a) and (b), find a 95% confidence interval estimating the proportion of…

A: Here we need to construct a 95% confidence interval.

Q: Use the accompanying Grade Point Averages data to find 80%, 85%, and 99% confidence intervals for…

A: The degrees of freedom is, df=n-1=30-1=29 The degrees of freedom is 29. Computation of critical…

Q: c) i: Calculate the average and median to the results. ii: Find a 95% confidence interval for µ.

A: S.no. x (x-xbar)^2 1 11.79 0.03092 2 11.82 0.02127 3 11.87 0.00918 4 11.92 0.00210 5 11.93…

Q: Use the accompanying Grade Point Averages data to find 90%, 95%, and 99% confidence intervals for…

A: Confidence interval : Confidence interval is a range of values it contains the true population…

Q: In a survey of 3299 adults aged 57 through 85​ years, it was found that 82.2​% of them used at least…

A: The confidence interval at 100 (1 – α) % confidence level gives us an interval estimate about the…

Q: on the data she gathers. Which one of the following combinations of sample size and confidence level…

A: here AS PER GUIDELINES I HAVE CALCULATED FIRST MAIN QUESTION , AS YOU HAVE POSTED MULTIPLE DIFFRENT…

Q: How Much More Effective Is It to Test Yourself in Studying? We have found that students who study by…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.