In 2005, Health Canada claimed that 16.6% of Canadian adults are obese. A researcher wanted to check whether this percentage has increased in 2009. He randomly selected 160 Canadian adults and found 30 of them are obese. He wants to develop a 92% confidence interval for the obese percentage in 2009. Write down the critical value

Q: Question 3 A researcher wanted to know the percentage of judges who are in favor of the death…

A: Question 3: The study is about the percentage of judges who are in favor of the death penalty. A…

Q: 3. A company that manufactures bicycles receives steel rods in large shipments from a supplier. From…

A: 3. The sample size is 10, sample mean is 12.033, and population standard deviation is 0.12.…

Q: Find a 99% confidence interval for the population mean for the data set (120, 80, 83, 115, 95, 90,…

A: Solution-:

Q: mpling process is repeated many time sers who use this social media platfor

A: Option b) is correct.   The estimate is given by p^ =0.458 + 0.5282 = 0.52

Q: QUESTION 23 A quality control inspector checks a sample of chips produced by a new machine. A sample…

A: given data,n=36x= no. of defective =3p^=xn=336=0.0833CI=0.95α=1-0.95=0.05we have to find out the…

Q: Suppose that the a college wants to have an idea of the average SAT score of the incoming freshman…

A: The confidence level is 0.90, the standard deviation is 310 and margin of error E is 50.

Q: QUESTION 9 Calculate the margin of error for an 80% confidence interval for the mean, when the…

A:

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: QUESTION 19 Suppose an internet marketing company wants to determine the current percentage of…

A: It is given that:Sample size: Number of customers click on ads on their smartphones: Confidence…

Q: Suppose you have a data set with 33 observations (n=30). What is the t-score for a confidence Level…

A: It is given that n=30 and confidence level is 0.90.

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: Question 4: A website is trying to improve registration for first-time visitors by showing 1% of the…

A: P = 0.01 n = 7520 X = 64 Formula Used: Confidence Inerval = p ± Z*p(1-p)n

Q: QUESTION 6 If the sample standard deviation is equal to 25.20 and the sample size is 60, what is the…

A: Given Information: Sample standard deviation s=25.20 Sample size n=60 Confidence level is 95%…

Q: n 2005, Health Canada claimed that 16.8% of Canadian adults are obese. A researcher wanted to check…

A:

Q: Express the confidence interval 60.3 % + 5.9 % in interval form.

A:

Q: Question 9: A study was run to determine the proportion of adults that feel sleep-deprived. A 95%…

A: Given that, a study was run to determine the proportion of adults that feel sleep-deprived. A 95%…

Q: Question 8 Netflix Addiction. A research was conducted to assess the impact of Netflix on students'…

A: Sample size (n) = 400Sample mean (x̅) = 10.7Standard deviations (s) = 4.2Significance level (α) = 1-…

Q: There is no difference(s) between an interval estimate and a confidence interval estimate. If true ,…

A: We can make only two types of estimates about the population. 1. Point estimate = A single value…

Q: QUESTION 3 Researchers studying the effect of a dietary drug used a sample of 86 patients and found…

A: Conditions based on the confidence interval and the sample size :   As the sample size increases,…

Q: A research study reported a 95% confidence interval for the mean time of hip surgeries based on a…

A: Solution - Given that, A research study reported a 95% confidence interval for the mean time of hip…

Q: QUESTION 5 The health department is estimating the percentage of smokers among adults aged between…

A: Given that  Sample size n =50 Favorable cases x =16 Sample proportion p^=x/n  =16/50 =0.32

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.