Find the critical value z/ needed to construct a confidence interval with level 85% Round the answer to two decimal places. The critical value for the 85% confidence level is

Q: The correct value of Z to use for an 80% confidence interval for is: O A. 1.96 О В. 1.28 O C. 2.33 O…

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Q: All electromCS manuracturing process has historically had a mean completion time of 65 minutes. It…

A: T test will be used here as population standard deviations is unknown

Q: In a survey of 1250 U.S. adults, 363 said that their favorite sport to watch is football. The 95%…

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Q: What z-value is associated with a 99% confidence interval? O a. -1.645 O b. 1.645 O C. 1.96 O d.…

A: We have given that Confidence level (c) = 99% = 0.99Significance level (α) = 1- 0.99 = 0.01

Q: Discuss the differences between confidence and probability when referring to a confidence interval.…

A: Statisticians use confidence intervals to measure uncertainty in a sample variable. confidence level…

Q: The 95% confidence interval of the average monthly bill for female is between 72.9334 and 0.61.5466.

A: The confidence interval is the interval range in which represent true value within it. It is…

Q: Fake Twitter followers: Many celebrities and public figures have Twitter accounts with large numbers…

A: Given that  x̄ = 13.3 , s = 9.8 , n = 53

Q: The confidence interval at the 95% level of confidence for the true population proportion was…

A: The 95% confidence interval is CI95=(0.665,0.835). We know, that as the level of confidence…

Q: Which of the following illustrates a confidence level? a. 95%                     b.12.5…

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Q: In terms of z scores, a 95% confidence interval consists of which of the following ranges? 1. ±1 z

A: Given, Z=x-μσ where, x= observed value μ=mean of the sample σ=standard deviation

Q: If n = 370 and p=0.31p, construct a 90% confidence interval. This should be rounded to three decimal…

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Q: The population mean of a set of data is unknown. The sample mean is 44, and the error bound for the…

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Q: In one community, a random sample of 25 foreclosed homes sold for an average of $443,776 with a…

A: From the provided information,Standard deviation (s) = 196739Sample mean (x̄) = 443776Sample size…

Q: a recent study of 100 people in Burlingame found that 19 were obese.  Find the 90% confidence…

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Q: Researchers conducted a study to determine whether magnets are effective in treating back pain. The…

A: Solution: Given information: n1= 20 Sample size of treatment n2= 20 Sample size of sham x1= 0.56…

Q: In a survey on supernatural experiences, 722 of 4019 adult Americans surveyed reported that they had…

A: Given : Sample Size, n = 4019 Number of successes, x = 722 confidence level,c=0.9

Q: The confidence interval at the 95% confidence level for mu(u) was reported to be (69.7, 90.3). Which…

A: Given, 95% confidence interval is (69.7, 90.3) lower limit at 95% C I = 69.7 upper limit at 95% C I…

Q: If α = 0.05, then what is the confidence level?

A: Given: α = 0.05   we know that, Confidence level+ α = 1

Q: The analyst decides to test this assumption by collecting a random sample of 100 New Yorkers and…

A: The sample proportion is, p^=xn=65100=0.65 Computation of critical value:…

Q: A sample of 1000 adults showed that 31% of them are smokers. The 90% confidence interval for the…

A: Solution: From the given information, n=1000, p=0.31 and the confidence level is 0.90. Then, the…

Q: A survey found that 33 of 66 randomly selected women and 37 of 66 randomly selected men follow a…

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Q: Which of the following indicates a confidence interval? a. 0.95              b.99%               c.…

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Q: a.) The individual object in the study was a randomly selected This is computer-graded so use exact…

A: Given,the 95% confidence interval for the average mean score in the final exam for each of the…

Q: A 95% confidence interval for the proportion of all statistics students from a large high school…

A: The objective of the question is to understand the relationship between the confidence level and the…

Q: The 95% confidence interval is ....<(p1-p2)<.

A: The 95% confidence interval is ....&lt;(p1-p2)&lt;....…

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: A poll commissioned by the Center on Addiction and Substance Abuse at Columbia University found that…

A: Given that, X = 1340 N = 2000 98% confidence level

Q: If we want to provide a 95% confidence interval for the mean of a population, the Z value is, .95…

A: Given that  95% confidence interval

Q: If we find a 95% confidence interval using a sample, then we can say... 95% of individuals will fall…

A: Given that:A 95% confidence interval using a sample is obtained.To find:The interpretation of this…

Q: Given that degrees of freedom is 18 at 95% confidence level, the value of t =________. Select one:…

A: Given that degrees of freedom is 18 at 95% confidence level since the hypothesis is left tailed or…

Q: Here are summary statistics for randomly selected weights of newborn girls: n=244, x 28.3 hg, s=7.1…

A: From the provided information, Sample size (n) = 244 Sample mean (x̅) = 28.3 hg Sample standard…

Q: Based on a random sample of 50 students, the 90 percent confidence interval for the mean amount of…

A: It is given that the 90% confidence interval for the mean amount of money students spend on lunch…

Q: How do I find the adjusted confidence level for NORM.S.IN() in excel? What will the adjusted…

A: Confidence level is 95  so, α=1-95%  =1-0.95  =0.05

Q: The table below gives the number of people that bought either product A, B, or C and their gender.…

A: Hello there! Thank you for the question. According to our honor code can answer only three sub parts…

Q: . Find the length of the confidence interval, given the following data: s= 6.5, n = 15, confidence…

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Q: If you want to be confident in your estimation of a confidence interval, you should use….

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Q: Use the given data to construct a 99% confidence interval for the population proportion p. x= 50,…

A: We have given that,  Sample size (n) = 70 and favorable cases (x)=50  Then,  We will find 99%…

Q: In terms of z scores, a 99% confidence interval consists of which of the following ranges? 1. ±1 z…

A: We know, If Z~N(0,1) Then, P(a &lt; Z &lt; b) = P( Z &lt; b ) - P( Z &lt; a) Also,  P( - a &lt; Z…