Suppose, upon constructing a 95% confidence interval based on your sample proportion of 0.28, you obtain the following interval: 0.201 to 0.359. Notice that the sample proportion of 0.28 is between the values of 0.201 and 0.359. Does this surprise you? Please explain why or why not.

Q: A 93.32% Cl is given as (2.5, 3.5). From this information, find a 95% confidence interval (yes, this…

A: The provided information is as follows:The 93.32% confidence interval is (2.5,3.5).

Q: A poll reported that 67.7% of adults in a certain country believe that organic produce is better for…

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Q: Determine the point estimate.An article in an educational journal discussing a non-conventional high…

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Q: If n = 220,p = 0.4,then what will be the 87.4% confidence interval for the population proportion?

A:

Q: A medical director needs to know the proportion of patients who have a single bed in their room. A…

A: It is given that sample size (n) is 200 and p-hat value is 0.59.

Q: You are told that a survey produced a 90% confidence interval for the mean spent on utilities per…

A:

Q: You want to estimate the proportion of all college students who traveled during spring break.   You…

A: Bhnjhhh

Q: want to estimate the proportion of all college students who traveled during spring break. survey a…

A: Given that Sample size n =200 Favorable cases x =116 Sample proportion p^=x/n =116/200 =0.58

Q: If n = 250 and X = 200, construct a 99% confidence interval for the population proportion, p. Give…

A: As given, n = 250 and x = 200.  It is asked to construct a 99% confidence interval for the…

Q: If the sample mean is 70 and the standard error of the sample mean is 8, what will be the 90%…

A:

Q: Construct the 90% confidence interval for the difference p1-p2 when x1=45, n1=85, x2=20, and n2=65.…

A: Given Information: x1=45n1=85x2=20n2=65c=90%=0.90

Q: What is the confidence interval? Select the correct choice below and, if necessary, fill in the…

A: Mean = 56.64 Standard deviation = 14.598 n=100

Q: Which of the following Z values would you use to calculate the 95% confidence interval? 1.28 1.96…

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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: A poll of 2500 people shows that 50% approve of a smoking ban in bars and restaurants in Kentucky.…

A: Given, n = 2500 p = 50% = 0.50 At 95% Confidence level, the value of Z is 1.96

Q: If n= 100 and x= 80, construct a 99% confidence interval.  Give your answers to three decimals

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Q: According the the U.S. Census bureau, the percentage of Santa Ana residents living in poverty is…

A: From the provided information,

Q: In a survey of 1798 US adults, 1365 said they had paid a bill online within the past year. What is…

A: Given x=1365 n=1798

Q: A survey is taken of 250 students, and a P of 0.45 is found. The same survey is repeated with 1,000…

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Q: Suppose we wish to calculate a 90% confidence interval for the average amount spent on books by…

A: confidence level=90%Margin of error(E)=2standard deviation()=30

Q: A recent survey of 25 students showed that they spent an average of $18.53 on petrol each week. The…

A:

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.