Margin of error and the confidence interval. A study of stress on the campus of your university using the College Undergraduate Stress Scale (CUSS) reported an average stress level of 1123 (a higher score indicating more stress) with a margin of error of 43 for 95% confidence. The study was based on a random sample of 400 undergraduates. (a) Give the 95% confidence interval. (b) If you wanted 99% confidence for the same study, would your margin of error be greater than, equal to, or less than 43?

Q: In a 2017 survey was conducted on what was the best day of the week.  The result indicated that 90%…

A: Margin of error is given by, And Confidence interval for this study,

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A: The data analysis provides valuable information to about the blood oxygen level who visited the…

Q: Several years ago, 36% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: When constructing a confidence interval, if we construct a confidence interval with a 95% confidence…

A: The general formula for the width of the confidence interval is,

Q: When you construct a 95% confidence interval, what are you 95% confident about?

A: Confidence intervals: Confidence intervals are the limits for the point estimate of population…

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A: Given,   Sample mean = 60 Standard error = 3   The objective is to construct the 95% confidence…

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A: Population proportion p=0.27Margin of error =E =0.05

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Q: 00000 the confidence interval? Both the margin of error and the width would increase. The margin of…

A: It is given that the two confidence interval. Here, need to compare the effect of decreasing…

Q: A telephone poll of 1,000 adult Americans was reported in an issue of a news magazine. One of the…

A: A telephone poll of 1,000 adult Americans was reported in an issue of a news magazine. One of the…

Q: What is the impact of changing from the 95% confidence interval to the 90% confidence interval? The…

A: Confidence Interval Confidence Interval refers to the range of the value that we expect our estimate…

Q: We have conducted a one sided hypothesis test with a significance level α = 0.02. We would like to…

A: Given data we have conducted a one sided hypothesis test with a significance level α=0.02

Q: 90% confidence interval is narrower than a 95% confidence interval using the exact same data.…

A: Conditions on confidence interval:   As the confidence level increases, width of the confidence…

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A:

Q: ude the per

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Q: 20. OxyContin The drug OxyContin (oxycodone) is used to treat pain, but it is dangerou because it is…

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Q: Family Closeness. A study conducted among college students evaluated the connection between drug use…

A:

Q: Given this interval, the margin of error

A: Given that The 90% confidence interval for the proportion is (0.32, 0.44).

Q: What formulas are used to find the confidence interval? Researchers comparing the effectiveness of…

A: According to the given information in this questionWe need to construct 95% confidence interval

Q: Think about a population mean that you may be interested in and propose a confidence interval…

A: Given sample, 2, 0, 1, 5, 0, 2, and 3. To estimate the confidence interval for a population mean we…

Q: A researcher is interested in testing the claim that the proportion of children (ages 8-12) who like…

A: given data sample 1  :children    n1  = 53sample 2 : teenager    n2   = 112ci for difference in…

Q: raw score that is 1.96 blank above the sample mean

A:

Q: True or False? A researcher wants to estimate the impact prenatal care during pregnancy can have on…

A: Formula for sample size is,

Q: You are going to construct a 99% confidence interval for the proportion of hip replacement…

A:

Q: A 95% confidence interval is narrower than a 90% confidence interval for the same data set. O True O…

A: We have to find given probability.

Q: In general, would you expect a 90% confidence interval on μ to be longer or shorter than a 95%…

A: Given It is given that the sample is same and CL is increased from 90% to 95%.

Q: If n = 440 and p = 0.52, construct a 90% confidence interval. %3D Give your answers to three…

A: Given information- Sample size, n = 440 Confidence level, c = 0.90 So, significance level (α) = 0.1…

Q: A study was being done to estimate the proportion of students who receive financial aid. If the…

A:

Q: What would answer be at 99% confidence interval?

A: We have given that,  Sample proportion (p̂) = 64% = 0.64 and sample size (n) = 550 Then,  We will…

Q: Several years ago, 43% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: Briefly describe the relationship between confidence interval and hypothesis testing.

A: Briefly describe the relationship between confidence interval and hypothesis testing.   A 95% CI…

Q: A shipment of lightbulbs will be accepted if the true percentage of defective lightbulbs is under…

A:

Q: Several years ago, 46% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given  p=0.46, n=1055, X=488

Q: Several years ago, 48% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given : n = 1035 X = 497

Q: According to a report on sleep deprivation by the Centers for Disease Control and Prevention, the…

A: From the provided information,