Johnny wants to construct a 95% confidence interval. He knows
that is the same as the middle 95% just using the higher z-score.
What is the z-score for a 95% confidence interval?
Johnny wants to construct a 95% confidence interval. He knows that is the same as the...
Gina wants to construct a 95% confidence interval for GMAT scores. She knows the standard deviation LaTeX: \sigma=113σ=113. She collects a simple random sample of size LaTeX: n=64n=64 and computes LaTeX: \bar{x}=526 What is the lower limit of this confidence interval? (Round to three decimal places.) What is the upper limit of this confidence interval? (Round to three decimal places.)
Question 19 (5 points) A pollster wants to construct a 95% confidence interval for the proportion of adults who believe that economic conditions are getting better. A Gallup poll taken in July 2010 estimates this proportion to be 0.33. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.039? Write only an integer as your answer. Your Answer: Answer Question 20 (5 points) A researcher wants to construct a...
A pollster wants to construct a 95% confidence interval for the proportion of children who watch Spongebob Squarepants. Estimate the sample size needed so that the confidence interval will have a margin of error of 0.061 ? Write only an integer as your answer.
A survey of 100 respondents as conducted to study proportion people snoring in their sleep. Approximately 40% people claim that they do. Using this information , construct a 95% confidence interval for the proportion of people that do snore in their sleep.
And construct a 95% confidence interval for the population mean for sample B 8.2.13-1 95% confidence interval for the population mean for each of the samples below plain why these Assuming that the population is normally distributed, construct a two samples produce differen t confidence intervals even though they have the same mean and range Full dataset SampleA: 1 1 4 4 5 5 8 8 Sample B: 1 2 3 45 6 7 8 Construct a 95% confidence interval...
Assuming that the population is normally distributed, construct a 95% confidence interval for the population mean, based on the following sample size of n = 5. 1, 2, 3, 4, and 30 In the given data, replace the value 30 with 5 and recalculate the confidence interval. Using these results, describe the effect of an outlier (that is, an extreme value) on the confidence interval, in general. Find a 95% confidence interval for the population mean, using the formula or...
What value of z* should be used to construct a 95% confidence interval of a population mean? Answer choices are rounded to the hundredths place.
"Given a sample of 12, with a mean of=10 StdDev =2. Construct the 95% Confidence interval. Lower end ___higher end ____ (Just enter the numbers in the spaces provided, round to 2 decimal places. Example of answer: Lower end 1.11, higher end 2.22 )"
Question 9 (1.5 points) A medical researcher wants to construct a 99% confidence interval for the proportion of knee replacement surgeries that result in complications. An article in the Journal of Bone and Joint Surgery suggested that approximately 8% of such operations result in complications. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of o.023 2 Write only an integer as your answer. Your Answer Answet Save Question 10...
You construct a 95% confidence interval for a population mean using a random sample. The confidence interval is 24.9 less thanmuless than31.5. Is the probability that mu is in this interval 0.95? Explain.