it is claimed that personal vehicle is driven 24500 km per year. would you agree with this claim if a random sample of 100 vehicle owners were asked to keep the records of their travel and showed that an average of 28000 km with a standard deviation of 3950 km with a significance level of 99%?

Q: The physical plant at the main campus of a large state university receives daily requests to replace…

A: We want to find the probability (%) P(49<X<79)= ?  X~N(μ=49,σ2=102)

Q: In a research report, UCLA Medical School claims that mice with an average life span of 32 months…

A: We have given that  Sample mean = 37 months  Population Standard deviation =4.9 Sample size=64 mice…

Q: An automobile insurance company claims that its rates for teenage drivers average $470 less per year…

A: Given: population mean = 470sample size=30sample mean = 435std deviation =65

Q: In a study of consumer credits, 25 randomly selected credit holders were surveyed, and the mean…

A:

Q: A sample of 23 provided a sample mean of 158 and a sample standard deviation of 20. Find the value…

A: Given that Sample size n = 23 Sample mean = 158 Sample SD = 20

Q: A tool company claims that the mean number of defective screws they produce per box is 72. The mean…

A:

Q: When the 583 female workers in the 2012 GSS were asked how many hours they worked in the previous…

A: Given data are appropriate for testing of hypothesis to test, z-test for single mean. Because it is…

Q: it is claimed that personal vehicle is driven 24500 km per year. would you agree with this claim if…

A:

Q: The former manager of the coffee shop in a local bookstore claimed that the mean daily sales were…

A: Givensample size(n)=11Mean(x)=2956.14standard deviation(s)=370α=0.01

Q: In a mid-size company, the distribution of the number of phone calls answered each day by each of…

A:

Q: ccording the the U.S. Department of Education, full-time graduate students receive an average salary…

A:

Q: the Champlain College pretends that average rent in Lennoxville for a 2 bedrooms apartment is $500.…

A: H0 : ? =500 H1 : ? ≠500 Population mean = ? = 500 Sample S.D = s =10 Sample size = n =41…

Q: Suppose the average golfer drives the ball around 225.55 yards with a standard deviation of 8.82.…

A: Assume that the random variable x denotes the distance of balls drove by the golfer.

Q: A food company is concerned that its 16-ounce can of sliced pears is not being filled correctly. The…

A: State the hypotheses That is, the mean weight is equal to 16 ounces. That is, the mean weight is…

Q: A company claims that, the mean battery life of their cell phone is at least 5 hours and standard…

A: Given,sample size(n)=25sample mean(x¯)=4.8standard deviation(σ)=0.5α=0.04H0:μ<5H1:μ≥5

Q: A hospital administrator believes that the standard deviation of the number of people using…

A:

Q: 2) Suppose that a manufacturer of laptop batternes claims that his product last more than 950 hours.…

A: Given : sample size, n = 45 sample mean, x̄ = 925 population standard deviation,σ=…

Q: The credit card balances on 1,000 accounts at the Jefferson Valley Bank have a mean of $760 and a…

A: mean = 760 s = 120 n = 1000

Q: The heights of 36 randomly selected horse jockeys found that the average height was 61 inches with a…

A: Given: Sample size of horse jockeys (n) = 36 Sample mean height x¯=61 Sample standard deviation of…

Q: According to a dietary study, high sodium intake may be related to ulcers, stomach cancer and…

A:

Q: In one town, monthly incomes for men with college degrees are found to have a standard deviation of…

A: Given that ,        n=22        standard deviation S=$ 901

Q: A dean at BUC claims that the average age of the students in this college is 25. A random sample of…

A: Note: Thank you for the question. Since it is not mentioned the standard deviation is population…

Q: Suppose that a manufacturer of laptop batteries claims that his product last more than 950 hours.…

A: Given data : sample size, n = 45 sample mean, x̄ = 925.0 sample standard…

Q: with a standard deviation of 0.6 ounces. If the manufacturer decides on a significance level of 0.05…

A: Here use single sample t test

Q: In a particular community, it is claimed that the mean household water usage for a particular month…

A:

Q: A company claims that the time their customers spend waiting in line for service is normally…

A: Given that  The company claims that the time their customers spend waiting in line for service…

Q: According to a dietary study, high sodium intake may be related to ulcers, stomach cancer and…

A:

Q: A trucking company determined that the distance traveled per truck per year is normally​…

A: Solution-: Let, X= The distance traveled per truck per year Given: We find, P[ either less than…

Q: A real estate company appraised the market value of 20 homes in a regional suburb in Western…

A:

Q: The manufacturer of a battery claims that the mean life of it is 8 months. An agency took a sample…

A:

Q: A sports science group claims that due to improved training methods, professional cyclists burn a…

A: a)   Denote μ as the mean number of calories professional cyclists burn is less than 6000.

Q: A CHED commissioner claims that the average cost of one year's tuition for all private colleges in…

A: Given that sample size n = 15 Sample mean = 31080 Sample SD = 400 Level of significance = 0.01

Q: Suppose the average height of a two year old male is normally distributed with a mean of 34.2 inches…

A: Given, Mean = μ = 34.2standard deviation = σ = 2.9

Q: The average salary in this city is $48,800. Is the average less for single people? 57 randomly…

A: To test the given  claim

Q: A random sample of eight observations from the first population resulted in a stan- dard deviation…

A: Solution

Q: An electrical contractor has concluded that the average home uses at least 500 yards of electrical…

A:

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: let X be the distance of fly balls hit to the outfield X~N(mu=260,sigma^2=50^2) n=49 we want to find…

Q: A sample of 106 body temperatures was found to have a mean of 98.20and a standard deviation of 0.62.…

A: Given that, A sample of 106 body temperatures was found to have a mean of 98.20and a standard…

Q: 1. A particular brand of tires claims that its deluxe tire averages at least 55,000 miles before it…

A: Given : n(sample size)=45 Alpha(level of sig.)=0.05

Q: A random sample of 100 pumpkins is obtained and the mean circumference is found to be 40.5 cm.…

A: The summary of statistics is, The type of test is two tailed test

Q: ordinary traveler claims that the average difference between the plane fares of all trips from the…

A: Given : Claim : The average difference between the plane fares of all trips from the Philippines to…

Q: It is claimed that personal vehicle is driven 24500 km per year. Would you agree with this claim if…

A: Given data: Population mean = 24500 Sample size = 100 Sample mean = 28000 Sample standard deviation…

Q: A job placement director claims that the average starting salary for nurse is $26000. A sample of 18…

A: Yes, There is enough evidence to reject the directors claim at 5% l.o.s.

Q: Statewide, social workers average 10.2 years of experience. In a random sample, 203 social workers…

A: Given information: μ=10.2, x=8.7, s=0.52, n = 203 Determine the null hypothesis and an alternative…

Q: A marine biologist claims that a harbor seal's average dive time is at least 5.8 minutes. A random…

A:

Q: In​ 2017, the average credit score for loans that were purchased by a​ government-sponsored mortgage…

A: We want to test the hypothesis

Q: Cushman and Wakefield reported that the average annual rent for office space in Tampa was $17.63 per…

A: H0 : ? =17.63     H1 : ? ≠17.63     Population mean = ? = 17.63 Sample S.D = s =3.64…

Q: A random sample of 100 two-month old babies is obtained, and the mean head circumference is found to…

A: Null hypothesis: The population mean is 40.0 cm. Alternative hypothesis: The population mean is not…