The weight of trucks traveling on a particular section of l-475 has a population mean of 15.8 tons and a population standard deviation of 9.2 tons. What is the probability a state highway inspector could select a sample of 49 trucks and find the sample mean to be 14.3 tons or less? Multiple Choice 0.1271 0.4841 0.0159 0.3729

Q: A population has a mean of 80 and a standard deviation of 8. Arandom sample of size 75 is selected.…

A: Solution: Let X be the random variable. From the given information, µ=80, σ=8 and n=75.

Q: The average GPA at the University of North Carolina is 3.2, with a standard deviation of 0.3. Assume…

A: Given that.   X~N( μ , ?^2 )   μ=3.2     , ?=0.3   Z-score =( x - μ )/?

Q: (A2) if the standard error of the mean is 10 for N=12, what is the standard error of the mean for…

A: Given (A2): SE=10 for N=12 (A2): SE= 50, for N=25

Q: he reading speed of second grade students in a large city is approximately​ normal, with a mean of…

A:

Q: A packet of chocolate bar's content is regularly distributed, with a mean of 250 grammes and a…

A:

Q: Use the scenario below to answer the following 4 questions. Ron McKeman, a University of Arkansas…

A: Given Information: Sample size n=45 Sample mean x¯=16.55 Sample standard deviation s=3 Significance…

Q: The life expectancy of a particular brand of tire is normally distributed with a mean of 30,000 and…

A: Given that.   X~N( μ , ?^2 )   μ=30000    , ?=6000   Z-score =( x - μ )/?

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: Given information Hypothesized mean µ = 19 inches Sample size (n) = 49 Mean x̅  = 18.5 inches…

Q: From a normally distributed population, we took a simple random sample of 700 students with a mean…

A:

Q: A medical investigation claims that the average number of infections per week at Al-Ahli hospital is…

A: We have to find correct answer...

Q: In order to set rates, an insurance company is trying to estimate the number of sick days that full…

A: Given :Population standard deviation = 2.8 daysCompany wants to be 95% confident that the true mean…

Q: from a sample. Calculate dard deviation, and varial : use technology. Round mal places. x 23.7 47.5…

A: The given data is 17.4, 22.7, 23.7, 26.5, 28.1, 36.1, 47.5

Q: At a certain bank, the mean checking account balance is ?=?150 and the population standard…

A: Given data: Mean = 150 Population standard deviation = 70 Sample size = 450 To find:  (i) Between…

Q: The average weight of an adult male in one state is 172 pounds with a standard deviation of 16…

A: Given datamean=172standard deviation=16n=36

Q: A sample of 100 cars driving on a freeway during a morning commute was drawn, and the number of…

A: Introduction: For a random variable X having k values, the ith observation of which is xi and…

Q: The average drive to work is 9.6 miles. Assume the standard deviation is 1.8 miles. If a random…

A: Given data ,u=9.6σ=1.8n=36P9<x<10=?

Q: A laptop producer has been getting complaints on the batteries they install. Particularly, the…

A: Given that there are 10 over heating batteries in the batch of 30. The probability of overheating…

Q: A manufacturer claims that a new design for a hands-free bluetooth device has increased the range to…

A: The following information is provided. Sample size, sample mean and sample standard deviation.…

Q: A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly…

A: From the given information, Sample size n =35 Sample mean, x̅=406.0. Population standard deviation,…

Q: A laptop producer has been getting complaints on the batteries they install. Particularly, the…

A: probability of overheating =P =9/20 =0.45 Let x be the random variable denoting the number of…

Q: A study of the amount of time it takes a mechanic to rebuild the transmission for a 2005 Chevrolet…

A: Given,mean(μ)=8.4standard deviation(σ)=1.8sample size(n)=40

Q: The average teachers salary in a particular state is $54,141. If the standard deviation is $10,430,…

A: From the provided information, Mean (µ) = $54141 Standard deviation (σ) = $10,430 X~N (54141, 10430)…

Q: Which of the following would be expected to result in a larger standard error of the mean? A. a…

A: standard error is calculated as, standard error SE=standard deviation σnn =sample size Explanation:…

Q: Given with an unknown shape of a population, consider the following values: u=75, σ=5 & n=40.…

A: As per company guidelines I solved only First questions..thank you

Q: n a process that manufactures tungsten-coated silicon wafers, the target resistance for a wafer is…

A: As the population standard deviation is not known, we will use t-distribution and perform a t-test.…

Q: In an effort to improve the quality of dining services, the Dean's Office hired an independent firm…

A:

Q: The plasticity of a polyethylene is affected by the concentration of a solution. When low…

A: Given that  We have to find the probability that Xhigh-Xlow

Q: Q#7:The average drive to work is 9.6 miles. Assume the standard deviation is 1.8 miles. If a random…

A:

Q: Assume the cost for an automobile repair is normally distributed with a mean of $524 and a standard…

A: Let "X" be the cost for an automobile repair. Refer Standard normal table/Z-table, Lookup for…

Q: Mitsubishi which operates and manages car rentals for DMMMSU employees found that the tire lifetime…

A: Given For the first question μ=50000σ=3500   For the second question  μ=50σ=6

Q: The weight of trucks traveling on a particular section of I-475 has a population mean of 15.8 tons…

A:

Q: The heights of strawberry plants are Normally distributed with a mean of 12 inches and a standard…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: A nutritionist claims that the mean tuna consumption by a person is 3.3 pounds per year. A sample of…

A: We have given that,  Hypothesized mean = 3.3 , Mean = 3.2 , SD = 1.06 , Sample size = 50 , At…

Q: The average drive to work is 9.6 miles. Assume the standard deviation is 1.8 miles. If a random…

A: From the given information, x¯=9.6σ=1.8n=36

Q: Which online stationery store has the best prices? An independent agency recently was asked to…

A:

Q: According to driver safety statistics in a particular area, one percent of drivers reported that…

A: As per our guidelines we are supposed to answer only one question per post so i am solving first…

Q: A medical investigation claims that the average number of infections per week at a hospital is 13.7.…

A:

Q: A data obtained from a random sample has mean 68 and standard deviation 35. The value whose Z-score…

A:

Q: The number of pages produced by a fax machine in a busy office is normally distributed with a mean…

A: Normal distribution

Q: A laptop producer has been getting complaints on the batteries they install. Particularly, the…

A: There are 9 overheating batteries in the batch of 20 means that the proportion of getting the…

Q: The amount of soda a dispensing machine pours into a 12-ounce can of soda follows a normal…

A:

Q: ssuming that a sample (N = 504) has a sample standard deviation of 2.26, what is the estimated…

A: Solution: Given information: n= 504 Sample size  s= 2.26 Sample standard deviation

Q: After deducting grants based on need, the average cost to attend the University of…

A:

Q: A mechanic a brand of automobile tire that has a expectancy that is normally distributedwith a mean…

A: Let X be the random variable for the expectancy. X is normally distributed with a mean of 28,000…

Q: 1. A rental car company claims the mean time to rent a car on their website is 60 seconds with a…

A: Given: Population mean μ = 60 seconds Standard deviation σ = 22 seconds sample mean x = 55 seconds…

Q: A statistical analysis of a very large sample of fully-assembled medical devices indicates that the…

A:

Q: d. If the claim is true, what is ?(?̅ ≤ 39.8)? e. Based on the answer to part (d), if the claim is…

A: Given that, A battery manufacturer claims that the lifetime of a certain type of battery has a…

Q: Kurtis is a statistician who claims that the average salary of an employee in the city of Yarmouth…

A: From the given information, the null and alternative hypotheses are: Null hypothesis: H0: μ ≤…

Q: It is reported that a survey had a standard error of the mean of 20, and it is assumed that the…

A: Given information- Population standard deviation (σ) = 500 Standard error of the mean (SE) = 20 We…

Q: "An electrical firm manufactures light bulbs that have a length of life that is approximately…

A: Given data,Mean μ=843sd    σ=35n=31Find mean of sampling distribution?