An automobile manufacturer claims that its van has a 36.7 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this van since it is believed that the van has an incorrect manufacturer's MPG rating. After testing 140 vans, they found a mean MPG of 37.0. Assume the standard deviation i known to be 1.4. A level of significance of 0.05 will be used. Find the value of the test statistic. Round your answer to 2 decimal places. Enter the value of the test statistic. Answer How to enter your answer (opens in new window) Keyp Keyboard Short Tables

Q: This question has several parts that must be completed sequentially. If you skip a part of the…

A: n=8 , x=2 , p=0.45and q=1-0.45=0.55A random variable XBinomial(n=8 , p=0.45)P(X=x)=

Q: R code please A gardener seeded 3 different colors of roses: white (theta white), red (theta red),…

A: Given that a gardener seeded 3 different colors of roses: white (theta white), red (theta red), and…

Q: Two different airlines have a flight from Los Angeles to New York that departs each weekday morning…

A: E denotes the event that the first airline's flight is fully booked on a particular day. F denotes…

Q: Find the variance and standard deviation for the sample

A:

Q: reate a 95% confidence interval for a population proportion from a sample of size 71 with sample…

A:

Q: You plan to conduct a survey to estimate the percentage of adults who have had chickenpox. Find the…

A: It is needed to find the number of people who must be surveyed if one wants to be 93% confident that…

Q: The crisis in the real estate market caused the listing prices of homes in certain areas to fall…

A: Sample size Claim: Current listing price average is less than $244000, the previous in the previour…

Q: In a study of fourth, fifth and sixth graders, the following data were collected on their gender and…

A: Given the data of gender of fourth, fifth and sixth graders, and their primary goal asPrimary…

Q: In a survey of 1002 people, 70% said that they voted in a recent presidential election. In…

A: n=1002

Q: . The average Stats' score of a sample of JMU students on test 1 was 75.7% and the standard…

A: The average stat score of JMU students is, μ=75.7%The standard deviation of the population is,…

Q: Which of the following time-series forecasting methods would not be used to forecast a time series…

A: Dummy Variable Regression:Dummy variable regression, also known as categorical regression, is used…

Q: Cynthia’s Design Studios had sales in the last four months of $12,700, $14,500, $19,100, and…

A: Given :Cynthia’s Design Studios had sales in the last four months of $12,700, $14,500, $19,100, and…

Q: XI 9 10 17 13 5 7 6 2 SS= 5² = S=

A: The question is about measures.Given :No. of observations ( n ) = 8To find :1 ) 2 ) SS3 ) s24 ) s

Q: Among all monthly bills from a certain credit card company, the mean amount billed was $465 and the…

A: The question is about approximation.Given :Sample no. of bills drawn ( n ) = 850Probability that the…

Q: a) Sketch the region corresponding to the statement P(-1.4 < Z < 2.4). Shade: Left of a value…

A: It is given that the standard normal random variable Z with mean 0 and standard deviation of 1.

Q: List the possible values of the random variable x. A.) x = 0, 1, 2, ..., 5 B.) x = 0, 1, 2, ..., 4…

A: Given that,Let X be the random variable that the number of babies recover fully.Proportion of babies…

Q: In murder trials in 20 Florida counties during 1976 and 1977, the death penalty was given in 19 out…

A: Victim's RaceDefendant's RaceDeath PenaltyNo death…

Q: A lottery posted the probabilities of winning each prize and the prize amounts as shown in the chart…

A: Given:PrizeProbability

Q: A personnel director interviewing 11 senior engineers for four job openings has scheduled six…

A: M=4N=11n=6

Q: Question 2. What is the probability that between 85 and 120 complaints are received in one week? Use…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Which of the following exponential smoothing constant values (a) puts the same weight on the most…

A: Exponential smoothing constant, often denoted by , is a coefficient or parameter used in time series…

Q: An institution reports many demographic statistics about countries of the world. Data were collected…

A: R-squared value is 71.9%Standard deviation s=4.303.Intercept is 83.3753.Slope is -4.54984.

Q: Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of…

A: Mean = 72 Standard deviation = 7 By using Excel spreadsheet, we have to answer mentioned questions.…

Q: Sche has written a love letter to Letecia and wants to deliver it in a romantic way, such as baking…

A: 1) According to the given information,Probability of success, p = 65% = 0.65Number of trials, n =…

Q: Computers A and B can independently generate positive integers: • Computer A generates positive…

A: Given that computers A and B can independently generate positive integers:Computer A generates…

Q: A new small business wants to know if its current radio advertising is effective. The owners decide…

A:

Q: Find the constant c so that f (x) is a pdf of some random variable X, and then find the cdf, F (x) =…

A: Givenwe find the constant  such that  is a pdf of some random variable we need to ensure that the…

Q: (c) Assuming the normal model can be used, determine P(x 2 64.9).

A: The mean is 63, the standard deviation is 16 and the sample size is 12.

Q: A sample of college students was asked how much they spent monthly on coffee. Approximate the mean…

A: It is given that a sample of college students was asked how much they spent monthly on coffee.

Q: Which of the following is an accurate description of a reliability coefficient? The average squared…

A: Reliability Coefficient- A reliability coefficient is a statistical measure used to gauge the…

Q: The graph illustrates a normal distribution for the prices paid for a particular model of HD…

A: Mean = 1600 Standard deviation = 150 Normal distribution , Normal distribution follows empirical…

Q: 1) What does one dot on the sampling distribution represent? Use appropriate notation. 2) Estimate…

A: 1) One dot on the given dot plot for sampling distribution, represents the sample proportion () of…

Q: The following data represent the monthly phone use, in minutes, of a customer enrolled in a fraud…

A: The formula for the upper fence is,Where,Q3 denotes the third quartileIQR denotes the interquartile…

Q: The football coach randomly selects 10 players and timed how long each player took to perform a…

A: From the provided information,Sample size (n) = 10Confidence level = 95%

Q: Suppose X1, X2, and X3 are independent Bernoulli random variables with success prob- abilities p1,…

A: E(X1E(X2)=p2E(X3)=p3

Q: 5) Recognize if a problem represents a binomial random variable. (Circle YES or NO) a) A certain bus…

A: As per the Bartleby guildlines we have to solve first three subparts and rest can be reposted.Given…

Q: For customers purchasing a refrigerator at a certain appliance store, let A be the event that the…

A: Given, P(A) = 0.72P(B|A) = 0.87P(B|A') = 0.85We are asked to construct a tree diagram and to find…

Q: Assume that a procedure yields a binomial distribution with a trial repeated n = 6 times. Use either…

A:

Q: A random sample for 11 exam scores produced the following (hours of study, grade) data values. Hours…

A: Data: X85312576734Y86.00745857.00055678478926480Sample size, n =11To finda. Covariance.b. The…

Q: The probability of no correct answers is (Round to three decimal places as needed.)

A:

Q: A researcher would like to determine if art therapy is effective in increasing well-being of nursing…

A: From the given informationsample size n= 16Mean =6.1Standard deviation = 15The level of significance…

Q: Calculate the upper 99% confidence interval for the population mean. (round to the nearest tenth)…

A:

Q: A statistical program is recommended. Consider the following data for two variables, x and y. xi 135…

A: From the given information the data stored in two random variables namely X and Y. Also, we have to…

Q: Problem 4 The purpose of a gauge capability study is to describe the variability of a gauge in…

A: The given data is as follows:…

Q: If 4 patients on average must be treated to prevent one death and the rate in the treated is 7%,…

A: It is given that, on average, 4 patients are to be treated to prevent death, and the rate of the…

Q: Break down the equation below: t = 4.30 -5.00/ square root of  2.01/10 + square root of 2.50/8

A:

Q: - Find the value of the test statistic.

A: An engineer designed a valve that will regulate water pressure on an automobile engine. The engineer…

Q: Future scientists: Education professionals refer to science, technology, engineering, and…

A: The reported proportion of freshmen, who are planning to major in STEM, p=26% (i.e., p=0.26).For the…

Q: Coronary bypass surgery: A healthcare agency reported that 48% of people who had coronary bypass…

A: Total number of patients n=14Probability p=0.48q=0.52

Q: 2.4-9. Suppose that the percentage of American drivers who multitask (e.g., talk on cell phones, eat…

A: p= percentage of American drivers who multitask (e.g., talk on cell phones, eat a snack, or text at…