The amount of time that office workers at Company XYZ spend on the computer each workday is normally distributed with a mean of 3.1 hours and a standard deviation of 0.5 hours. Find the percentage of office workers at Company XYZ that spend less than 4.1 hours on the computer. O 98% O 95% 92% O correct answer is not given

Q: The typical amount of sleep per night for college students has a bell-shaped distribution with a…

A: Consider, X be the random variable that shows the amount of sleep per night. That is, X~Nμ=7.5,σ=1.9…

Q: The heights of women have a symmetric distribution with a mean of 64 inches and a standard deviation…

A:

Q: The tine spent by a teacher at woek in the holidays is nonually distributed with a mean of 20 hours…

A: From the above data Third option is correct 17.8

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

A:

Q: The Graduate Management Admission Test (GMAT) is taken by individuals interested in pursuing…

A: From the provided information, Population mean (µ) = 550 Sample size (n) = 250 Population standard…

Q: The average McDonald's restaurant generates $3 million in sales each year with a standard deviation…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: A math teacher claims that she has developed a review course that increases the scores of students…

A: Given that    n=2000x¯=532s=117α=0.10

Q: The average McDonald's restaurant generates $2.3 million in sales each year with a standard…

A: Here, population standard deviation is known, so we can perform a z-test .

Q: You work for a consumer watchdog publication and are testing the advertising claims of a tire…

A: Formula for standard deviation is, s=x-x¯2n-1 Let us define xi as the given data values.

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A: From the given information, Head breadths are normally distributed with mean 6.1 in and standard…

Q: Students at a major university are complaining of a serious housing crunch. They complain that many…

A: a. Consider that a random variable X has expected value μ and standard deviation, σ. Now, according…

Q: The life span of a brand of tireis normally di stributed with a mean of 50,000 miles and a standard…

A:

Q: The average McDonald's restaurant generates $2 million in sales each year with a standard deviation…

A: Sample  (x) (x-x̄)2 1 2.6 0.1089 2 3.2 0.8649 3 2.2 0.0049 4 2.6 0.1089 5 2.2 0.0049 6…

Q: Full-time college students report spending a mean of 29 hours per week on academic​ activities, both…

A: Givenmean(μ)=29standard deviation(σ)=4sample size(n)=64

Q: There are 15 mobile phones in a package box, 9 of which are iphones. If a person takes 5 phones from…

A:

Q: The average McDonald's restaurant generates $3.6 million in sales each year with a standard…

A: For the MacDonald's restaurant the following information is provided. Average μ=3.6 Standard…

Q: The pucks used by the National Hockey League for ice hockey must weigh between 5.5 and 6.0 ounces.…

A:

Q: 19. Commuting to work: The American Community Survey sampled 1923 people in Colorado and asked them…

A:

Q: The time spent by a teacher at work in the holidays is normally distributed with a mean of 20 hours…

A: X: time spent by a teacher at work in the holidaysX~N(μ,σ)Mean(μ)=20 hoursstandard deviation(σ)=5…

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A: Given data: Head breadths are normally distributed with mean and standard deviation as:…

Q: Weekly Ford sales follow a normal distribution, with amean of 50,000 cars and a standard deviation…

A:

Q: A musicologist is attempting to determine the mean length of modern pop songs. She conducts a sample…

A:

Q: A clinical researcher performs a clinical trial on 8 patients to determine whether a drug treatment…

A: Given : Claim: The drug treatment has an effect on serum glucose.

Q: The promoter of a touring dance show wishes to analyse how the price per ticket affects the size of…

A: As per our guidelines, we are allowed to answer first three sub-parts only. Thanks   (a) Enter the…

Q: A college admissions officer takes a simple random sample of 81 entering freshman. The admissions…

A: (a). Identify the parameter that is estimated by the admissions officer: The sample size is n = 81.…

Q: Razzle Ice Cream is an ice cream shop chain that has locations all across the nation. Customers at…

A: Given Data: μ=2.37 σ=0.79 n=6

Q: A student assistant administers an exam for the incoming grade 11 ABM students. Fifteen incoming…

A: We have to find test statistics.

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

A:

Q: A charitable organization solicits donations by telephone. Employees are paid $60 plus 20% of the…

A: Suppose X be the amount of money generated in a week. E(X)=$700…

Q: Sweet Rush is an ice cream shop chain that has locations all across the nation, Customers at Sweet…

A: Solution-: Given: μ=1.40,σ=0.85,n=10 We find, (a) μX¯=? (b) σX¯=?

Q: The time spent by a teacher at work in the holidays is normally distributed with a mean of 20 hours…

A: Given: mean μ= 20 Standard deviation σ=5 Concept: Here we shall use z score formula, z=x-μσ

Q: Calculate z scores from two samples "he tallest living man at one time had a height of 252 cm. The…

A: Given data,Mean is μ=170.25sd is     σ=8.47

Q: A researcher was testing the number of pop corn kernels that popped out of a mini bag of 100 kernels…

A: Given a researcher was testing the number of pop corn kernels that popped out of a mini bag of 100…

Q: A popular restaurant chain advertises that it delivers orders within 30 minutes. Suppose the average…

A:

Q: An investigator predicts that dog owners in the country spend more time walking their dogs than do…

A: Given : Country Owners : n = 21 x1 = 15s1 = 4 City Owners : n = 23 x2 = 10s2 = 3

Q: Use technology or Z distribution table to find the indicated area the weight of grapefruits in a bin…

A: From the given information, the weight of grapefruits in a bin are normally distributed with a mean…

Q: On the planet of Mercury, 4-year-olds average 3.2 hours a day unsupervised. Most of the unsupervised…

A: As per the guidelines, we are only allowed to solve three subparts. Please post the remaining…

Q: verage price for a particular car is $20,300 with a standard deviation of $1,600. You are shopping…

A: Given data,Mean μ=20300sd σ=1600x=21950z-score=?

Q: The average McDonald's restaurant generates $3.6 million in sales each year with a standard…

A: In this question given that survey of 27 restaurant Find out a null and alternative hypothesis…

Q: The amount of time spent in prison has a mean of 5.2 years and a standard deviation of 1.3 years. A…

A: Given: Population mean μ = 5.2 years Population standard deviation σ = 1.3 years n = 16 Significance…

Q: Companies that design furniture for elementary school classrooms produce a variety of sizes for kids…

A: We know 1 feet = 12 inches So, 3 feet = 36 inches Define the Random Variable, X : Height of a…

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A: Let X be the length of the rods. Here, X is normally distributed with mean, μ=114.5 cm and standard…

Q: What is the test statistic for this test?

A: The population mean is $50,000, sample size is 100, sample mean is $50,250, and sample standard…

Q: Running times for 400 meters are Normally distributed for young men between 18 and 30 years of age,…

A: GivenMean(μ)=93standard deviation(σ)=6

Q: The average McDonald's restaurant generates $3.3 million in sales each year with a standard…

A:

Q: A paint machine dispenses dye into paint cans to create different shades of paint. The amount of dye…

A: Z= x-μσ~ N(0,1) μ = 5 , σ = 0.4

Q: An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots…

A:

Q: The time needed to complete a math examination is bell-shaped with a mean of 120 minutes and a…

A: Solution-: Given: μ=3120min,σ=5min We find, (a) What percentage of students will complete the exam…

Q: Calculate the standard error of prison time for the sample.

A: The amount of time spent in prison has a mean of 5.2 years and a standard deviation of 1.3 years.…

Q: The time spent by a teacher at work in the holidays is normally distributed with a mean of 20 hours…

A: