A test is conducted on a new drug treatment to improve patient’s knee flexibility. The scores of the 9 subjects before and after the new treatment are given on the table. What is the 95% confidence interval for the improvement of test scores after the new treatment is given to the patients?       [2.23 , 15.55] [7.52 , 10.26] [6.94 , 10.84] [3.67 , 14.11]

Q: You are interested in finding a 95% confidence interval for the mean number of visits for physical…

A: Given,mean(x¯)=13.6standard deviation (s)=9.1918sample size(n)=10degrees of…

Q: I've asked 91 students on Monday whether they did their homework over the weekend. 20 of them said…

A:

Q: Many high school students take the AP tests in different subject areas. In one year, of the 144,140…

A: given data  n1 = 144140   x1 = 84545p^1 = x1n1 = 84545144140 = 0.5865 n2 = 216298    x2 = 126501p^2…

Q: í 600 people sampled, 348 had kids.

A: Given that  Sample size (n) = 600 Had kids (X) = 348   We know that  Best point estimate (p)= xn…

Q: When you follow up a hypothesis test with a confidence interval, sometimes you must change the…

A: Data:

Q: A survey of 700 non-fatal accidents showed that 167 involved uninsured drivers. Construct a 99%…

A: Given data,n=700x=167Point estimate isp=xn=167700=0.2386Construct a 99% confidence interval?

Q: Your statistics instructor claims that 60 percent of the students who take her Elementary Statistics…

A: From the provided information, Sample size (n) = 64 From which 33 feel more enriched as a result of…

Q: Give a real life example of how confidence intervals are used.

A: Solution-: We want to get a real life example of how confidence intervals are used.

Q: A poll of 1060 adults in a country was conducted by telephone. Of those surveyed, 169 had…

A: The sample size is 1060 and number of success is 169.

Q: main, the

A:

Q: The figure shows the results of a recent Marist poll asking about President Biden’s approval rating.…

A: *Answer:  Given the results of a recent Marist poll asking about President Biden’s approval rating.

Q: e presidential election process reports many polls. You survey 40 college students and find that 70%…

A: Given data, n=40 p=70%=0.70 Find the 95% confidence interval to estimate the population proportion…

Q: m what their favorite color was. 23 people said their favorite color is blue. Using this sample,…

A: Sample proportion is the fraction of successful samples and total number of samples. Here,  Total…

Q: Illustrate the formula for the confidence interval?

A: confidence interval is defined as a range of values so defined that there is a specified probability…

Q: The 90% confidence interval is from to. (Round to three decimal places as needed.)

A: A poll of 1030 adults in a country was conducted by telephone. Of those surveyed, 139 had…

Q: BCD Travel wants to estimate the population proportion of adults who favor historical sites for…

A: p^ = 59% = 0.59Sample size = 24086% confidence level

Q: You are constructing a 99% confidence interval for the proportion of all caterpillars that…

A: Given information- Sample size, n = 396 We have given that out of 396 randomly selected caterpillars…

Q: Express the confidence interval (77.4 % , 89.2 % ) in the form of p ± ME.

A: GivenConfidence Interval(77.4% , 89.2%)

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: Kindly tell what is confidence interval in stats thanks.

A: An essential idea in statistics is a confidence interval (CI), which provides a range that, with a…

Q: You want to get a 95% confidence interval for the difference between the percentage of females with…

A:

Q: If n = 15, the sample mean = 150, SD = 10, what is the confidence interval (using 99% confidence…

A: Given data,n=15x=150σ=10z-value at 99% confidence is Zc=2.576

Q: A researcher wants to estimate the actual proportion of citizens of a certain country who feel that…

A:

Q: 4. A researcher asks 600 people if they received a flu vaccine, and 65% said they did. What is the…

A:

Q: A firm randomly samples 100 workers at its New York plant and finds that 32% of the workers say that…

A: The proportion of workers who say that they buy the firm’s product is 0.32.

Q: Use the figure below to answer the questions that follow. The figure shows the results of a recent…

A: Given the results of a recent Marist poll asking about President Biden’s approval rating.

Q: Of the 1,000 people, 550 people used company s's smartphone and 460 people used company a's…

A: Given: n= 1000 ,x= 550.0 At 95.0 % confidence level , z score= 1.96 Need to find confidence…

Q: 24. Job Interviews In a Harris poll of 514 human resource professionals, 90% said that the…

A: From the parts b) and c), the 99% confidence interval is (0.8659 , 0.9341) and the 80% confidence…

Q: Express the form of most of the confidence intervals that you will encounter in your study of…

A: Confidence Interval:Confidence interval is the interval estimate of the population parameter. It is…

Q: This my third time posting the same question. Because no one answer it straight to me. I already…

A: 1)From the provided information, The sample number of students watching video (n) = 19 The number of…

Q: Describe when you would use a t-score instead of a z-score when finding a confidence interval.

A: Describe in what conditions t-score would be used instead of a z-score when finding a confidence…

Q: The table below shows test result of the effect of Prozac on the well- being of depressed…

A:

Q: Your analysis of the raw data indicates that 16 of the 30 students reported driving no more than 20…

A: From the given information, let X be the number of students reported no more than 20 miles per day.…

Q: you want to find out the percent of people who use an iPhone so you survey 120 random adults of whom…

A: