A 95% confidence interval for the proportion of all statistics students from a large high school that have a part-time job is (0.225, 0.395). You plan to compute a 99% confidence interval using the same data. Which of the following statements is correct?

Q: If n=18, (x-bar)=35, and s-11, construct a confidence interval at a 80% confidence level. Assume the…

A: The sample size is .The sample mean is .The sample standard deviation is The confidence level is…

Q: The number of miles ridden until a rental bicycle gets a flat tire is modelled as an Exponential(2)…

A: Given the sample of distances xi​: [8.0, 42.2, 16.8, 44.8, 10]Sample size (n) = 5To find the normal…

Q: need help ,result 263.542 is marked as incorrect Estimate the retails sales in the U. S. in 2014…

A: The objective of the question is to estimate the retail sales in the U.S. in 2014 using the given…

Q: what would be the most appropriate probability distribution for each of the following random…

A: The probability distribution use to find probability of any random variable.Probability distribution…

Q: Use the data in the following table, which lists drive-thru order accuracy at popular fast food…

A: The question is about probability.Given :To find :a ) Probability of both the orders are accurate…

Q: The accompanying table shows the results of a survey in which 250 male and 250 female workers ages…

A: Answer                              Contribute              Do not contribute          TotalMale…

Q: A 100% Normal text T Type of Area Rural Urban Total Arial -|-12 3. The following contingency table…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

Q: An educator wants to determine whether a new curriculum significantly improves standardized test…

A: 1) The sampling would be considered independent because the selection of individuals in one group…

Q: received randomized, double-blind clinical trials of a new vaccine, rats were randomly divided into…

A: Given x1=104x2=61n1=699n2=580

Q: If n=490 and p (p-hat) -0.79, find the margin of error at a 99% confidence level Give your answer to…

A: The question is about margin of error.Given :No. of observations in the sample ( n ) = 490Proportion…

Q: 19. A population of toy cars has a mean length of 10.5 centimeters and a standard deviation of 5…

A: The standard deviation of the sampling distribution of all samples with n= 1250

Q: Here are data on the monthly price of gas for a certain year, which is a component of the Consumer…

A: Given data is:Month: Jan    Feb     Mar    Apr    May   Jun    Jul     Aug   Sep    Oct    Nov…

Q: Consider a finite population with five elements labeled A, B, C, D, and E. Ten possible simple…

A: Given  five finite element labeled A,B, C, D, E

Q: another plant having streaky petals. A geneticist states that 75% of the offspring from this cross…

A: Given information:k= 2 categories n= 100 sample size

Q: The distribution of heart rates for women ages 20-39 is approximately normal with a mean of 73 beats…

A: The mean is 73 and the standard deviation is 15.9.sample size, n = 6.

Q: Find the margin of error for the given values of c, s, and n. c=0.90, s= 3.5, n = 6 Click the icon…

A: Given, c=0.90, S=3.5 and n=6

Q: (a) List an example (b) List an example of two events that are independent. of two events that are…

A: Independent Events:Two events, A and B, are independent if the occurrence of one event does not…

Q: particular county employs three assessors who are responsible for determining the value of…

A: Factor A denotes assessors. Factor B denotes houses

Q: The acceptable level for insect filth in a certain food item is 4 insect fragments (larvae, eggs,…

A: Mean µ = 4  (acceptance level)n = 60Sample mean x¯  = 4.5a)n = 60 > 30Central Limit theorem:If X…

Q: fic Accidents The county highway department recorded the following probabilities for the number of…

A: Let X be the number of accidents per day on a certain freeway for one month.The…

Q: Aluminum Ceramic Too Cold Aluminum 1 Ceramic 5 OK Calculate the marginal frequencies and marginal…

A: Given,a contingency table with conditional frequencies.To complete the contingency table and fill…

Q: A state legislator wants to determine whether his voters' performance rating (00 - 100100) has…

A: Given the data on the legislator's performance from the same ten randomly selected voters for last…

Q: A certain drug can be used to reduce the acid produced by the body and heal damage to the esophagus…

A: The hypothesized proportion value p0 is 0.94.

Q: Samples of 100 8-hour shifts were randomly selected from the police records for each of two…

A: The objective of this question is to find a 90% confidence interval for the difference in the mean…

Q: Single Policyholders n₁ = 900 number making claims = 153 Ho: P₁ P₂ = 0 H₂₁: P₁ P₂ = 0 O Ho: P₁ P₂ >…

A: Given information

Q: Find the critical value for the confidence level c = 0.95 and sample size n = 18. Click the icon to…

A: AnswerGiven,The sample size [n] = 18degree of freedom = n-1

Q: In a linear regression model with only one predictor variable, β will equal r. Group of answer…

A: The question is asking whether the slope of the regression line (β) is equal to the correlation…

Q: Teachers' Salaries The average annual salary for all U.S. teachers is $47,750. Assume that the…

A: The question is about a normal distribution.Given :Population mean annual salary of teachers (  ) =…

Q: Unearned Interest by the Actuarial Method Each loan was paid in full before its due date. (a) Obtain…

A: Regular Monthly PaymentAPRRemaining Number of Scheduled Payments after…

Q: Women athletes at a certain university have a long-term graduation rate of 67%. Over the past…

A: Answer Given,The favorable cases [x] = 21The sample size [n] =38

Q: Hypothesis Tests A study was done to whether or not corrosion of exterior concrete was different…

A: Given that a study was done to whether or not corrosion of exterior concrete was different under…

Q: According to one association, the total energy needed during pregnancy is normally distributed, with…

A: Suppose the random variable x defines the total energy needed during pregnancy by a woman.

Q: Here is a bivariate data set. X 15 18 20 50 14 10 26 y -8 13 8 86 12 -19 18 Find the correlation…

A: Solution:-The correlation coefficient (often denoted as ) can be calculated using the following…

Q: Problem #5: Find the EPV of a whole life insurance policy that pays an amount at the time of death…

A: given that ;to find:EPV of whole life insurance policy.

Q: The secretary of an association of professional landscape gardeners claims that the average cost of…

A: From the provided information,

Q: Players' match activity according to different age groups depending on playing position. Independent…

A: The given data represents the maximum speed of players in different age groups, regardless of their…

Q: A sample of 250 high school students were asked, “If you had $1000 to contribute to one kind of…

A: Given data: OrganizationEducationEnvironmentHealthInternational…

Q: Independent random samples were selected from two quantitative populations, with sample sizes,…

A: The objective of this question is to construct a 90% and a 99% confidence interval for the…

Q: The following table gives the city and highway mileages (miles per gallon) for 22 two-seaters listed…

A: Let Y be the highway mileage and X be the city mileage. The data on X and Y is given as follows.…

Q: Suppose these data show the number of gallons of gasoline sold by a gasoline distributor in…

A: Given that,The data is as follows,Week sales118222319424519616721819922102011151223

Q: Interpret the negative slope of the below illustration:

A: The negative slope of the line, .The x-axis represents lockdown days in a year.The y-axis represents…

Q: In a test of the hypothesis that females smile at others more than males do, females and males were…

A: The objective of this question is to test the hypothesis that females smile more than males. We are…

Q: A researcher claims that at least 10% of all football helmets have manufacturing flaws that could…

A: From the provided information,

Q: The distribution of pH measurements at a particular site is strongly skewed with mean 6.4 and…

A: Mean()=6.4standard deviation()=0.1

Q: According to a University Center for Logistics Management, 9% of all merchandise sold in the United…

A: Let X be the number of items returned.Given, X=10 and n=90Null hypothesis:Alternative hypothesis:

Q: Suppose a simple random sample of size n = 64 is obtained from a population that is skewed right…

A: Given information:Population mean=70Population standard deviation=16(a)It is clear that the sample…

Q: There are 20,000 eligible voters in Marion County, South Carolina. A random sample of 500 voters…

A: A random sample of 500 voters revealed 330 plan to vote for Tim Scott for Senatei.e. Let X be the…

Q: Test the hypothesis using the P-value approach. Be sure to verify the requirements of the test. Ho:…

A: It is required to verify the requirements, and test the given hypotheses.

Q: Do single-parent families tend to be more impoverished than families with two parents? In order to…

A: Given table data is as below,Column 1Column 2TotalsRow 1242044Row 2114556Totals3565N=100

Q: A basketball player makes 80% of his free throws. Suppose this player attempts 120 free throws. Find…

A: n=sample size=120 p=probability of free throwp=88%