A researcher found that a 95% confidence interval for the mean hours per week spent studying by college students was (13, 17). Which is true?

Q: A survey of 540 depressed shoppers found at 32% of them shop on impulse. What is the 99% confidence…

A: Given : Sample Size, n = 540 confidence level,c=0.99 Significance level, α…

Q: Construct a 99% confidence interval for the mean

A: a) Let to help a consumer assess the risks they are taking, the Food and Drug Administration…

Q: A poll conducted in 2013 found that 52% of U.S. adult Twitter users get at least some news on…

A: The proportion of the twitter users that gets at least some news is 0.52. Since the required…

Q: A laboratory tested 85 chicken eggs and found that the mean amount of cholesterol was 224 milligrams…

A: Given : n=85 , X-bar=224  , σ=16.6  , α=0.05 Since , the population standard deviation (σ) is known.…

Q: A recent poll found that 59% of adults believe the state of moral values is poor. For 400 randomly…

A: Here, n = 400 and p = 0.59

Q: A survey of 700 non-fatal accidents showed that 167 involved uninsured drivers. Construct a 99%…

A: Given data,n=700x=167Point estimate isp=xn=167700=0.2386Construct a 99% confidence interval?

Q: A market researcher, Codie, wants to find a 97% confidence interval for the mean number of dollars…

A:

Q: In a random sample of 500 people eating lunch at a cafeteria on various Fridays, it was found that…

A:

Q: he confidence interval was (73, 83) What was the point estimate? What was the margin of error?

A: Given: Lower limit =73 Upper limit =83 The point estimate can be calculated as: Point estimate…

Q: Using the 99% level of confidence, what is the confidence interval for proportion of students…

A: Let X be the random variable such number of students attending home football games. X = 750 N: Total…

Q: In a random sample of 500 people eating lunchbat a cafeteria on various fridays, it was found that…

A: Given X=160 n=500 P=X/n

Q: A person must score in the upper 2% of the population on an IQ test to qualify for membership in…

A: From the given information, consider X be a random variable denoting score in an IQ test for…

Q: sports psychologist tests a new coaching method and finds that of the 43 novice athletes who were…

A:

Q: Construct a 95% confidence interval of the average.

A: Given : Y = 0.00039508 S = 0.0084646 n = 1,259

Q: The F test for comparing standard deviations is robust True False

A: We have given  statement about the  F -test

Q: A random variance survey of 495 adults found that 59 had diabetes. which of the following is a 98%…

A:

Q: A poll conducted randomly in 2014 found that 52% of U.S. adult Twitter users get at least some news…

A: Proportion is 0.52. The standard error 0.024 The absolute value of Zα/2 is 2.5758 using the Excel…

Q: A researcher wanted to determine the mean number of hours per week the typical person watches…

A: Obtain the required sample size: The given confidence level 100*(1–α)% = 95%. The critical value is…

Q: What is the z-score of x = 11, if it is 2.5 standard deviations to the left of the mean?

A:

Q: What is the 90% confidence interval for the variance of exam scores for 28 algebra students, if the…

A: Obtain the 90% confidence interval for the variance of exam scores. The 90% confidence interval for…

Q: Construct a 95% confidence interval estimate. How does this change your answer to (b)?

A: (d)

Q: What is the margin of error for a sample of 34 students whose average height, with 90% confidence,…

A: Confidence Interval: Confidence interval is the interval estimate of the population parameter. It is…

Q: A researcher was commissioned to find out the proportion of students who use mobile phones in online…

A: Given: X=475N=500ME=0.01CI=0.99

Q: Explain the steps in computing a confidence interval for ρ?

A: Introduction: The steps to construct a confidence interval in general are: Identify a sample…

Q: A study found a confidence interval on the proportion of children that are hearing impaired was 0.04…

A: Given confidence interval is 0.04 to 0.16 i.e., p-E=0.04 -->1 p+E=0.16 -->2

Q: What is the 90% confidence interval of the mean?

A: A confidence interval is an interval that has the property that is very likely that the population…

Q: What is z* for a 92% confidence level?

A: To find value of Z* for a 92% confidence level ??

Q: State the equation for the 95% confidence interval?

A: The equation for confidence interval can be stated as: Here x̅ is the sample mean, Zα/2 is the…

Q: From a recent survey, the 90% confidence interval estimate of the proportion of students who have…

A: Note: As per the guidelines only one question can be answered. Kindly,  resubmit the question with…

Q: A random survey of 36 airline passengers indicates that twelve have never flown before. Find a 95%…

A: We have given that,  Sample size (n) = 36 and favorable cases         (X) = 12 Then,  We Will find…

Q: thirty randomly selected students took the calculus final. if the sample mean was 91 and 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: A survey of 280 homeless persons showed that 63 were veterans. Construct a 90% confidence interval…

A: Number of people took part in survey, n = 280 Number of veterans =63 The probability of homeless…

Q: The 95% confidence interval for the mean contains the sample mean with 95% certainty.TrueFalse

A: The confidence interval provides us a different range at different levels of significance. Since,…

Q: Find a 90% confidence interval for the true proportion of people that eat frog legs, if in a sample…

A: Given, n = 732 p = 0.65 1 - α = 0.90α = 0.1α2 = 0.05   To find, 90% confidence interval for the true…

Q: Would represent a 90% confidence interval for the average highway mileage of all Smart Cars?

A: we need to find the confidence interval of the mean GIVEN mean=47 S.D=5 n=15

Q: A Gallup poll of 1487 adults showed that 43% of the respondents have Facebook pages.  Construct a…

A: Confidence Interval: In statistics, we can say a range of values of the specified population…

Q: A recent study of 750 internet users in Europe found that 35% of internet users were women. What is…

A: It is given that the study of 750 internet users in Europe found that 35% of internet users were…

Q: Dr. Soria surveyed 34,000+ college students about their rates of housing insecurity during the…

A: The proportion of college students experiencing housing insecurity at that time is 0.22, and the…

Q: In a poll of 27 students, 65% ±6% were in favor of increasing the amount of time between classes.…

A: The degrees of freedom is, df=n-1=27-1=26 The degrees of freedom is 26. Computation of critical…

Q: A survey of 800 women shoppers found that 17% of them shop on impulse. what is 98% confidence…

A:

Q: A random sample of high school seniors were asked whether they were applying for college. The…

A:

Q: A nutritionist wants to know the population proportion of Grade 1 learners who eat vegetables.…

A: 2) It is given that the sample size n is 1200 and the number of respondents who eat vegetables (x)…

Q: Apply the t-interval procedure to find a 95% confidence interval for the mean arterial blood…

A: We want to find the 95% CI for population mean

Q: A study of 390 kindergarten students showed that they have seen on average 4500 hours of television.…

A: Obtain the 95% confidence interval for the mean of all the students. The 95% confidence interval for…

Q: a laboratory tested 36 chicken eggs and found that the mean amount of the cholesterol was 230 mg…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.