At a supermarket, the mean waiting time to get to the checkout counter is 5 minutes and the standard deviation is 2 minutes. 3. Binh waits for 1 minute. How many standard deviations away from the mean is his wait time? 4. Rosa waits for 11 minutes before she gets to the checkout counter. How many standard deviations away from the mean is Rosa’s wait time?

Q: Mark, who is on the UNH football team, weighs 236 pounds. The entire football team has a mean weight…

A: Calculate the z-score corresponding to the Mark

Q: A manufacturer produces widgets that are packaged in boxes of 250. The probability of a widget…

A: Binomial distribution : A Binomial is a type of distribution which has two possible outcomes. i.e.,…

Q: The CEO of a large manufacturing company is curious if there is a difference in productivity level…

A: Given Information: Group 1: Sample size = 35 Mean = 1276 parts Population standard deviation = 347…

Q: The number of students passing through Zobel St. was observed and recorded every weekday afternoon…

A: Given:

Q: 11) Find the score that separates the top 80% from the bottom 20% if the Mean is 100 and the…

A: Given: Using Z table or excel command =NORMSINV(0.20) we get,

Q: 00 freshmen at Arundel University took part in a math comprehension test. The scores were normally…

A: The middle (center) of the normal curve represents the mean of the curve. The normal curve is the…

Q: A food processing plant fills snack-sized bags of crackers. The mean number of crackers in each bag…

A: We have given that  Mean = 22 Standard deviation = 2 Sample size = 24

Q: A pharmaceutical company claims that a drug is effective in treating 90% of people having severe…

A: It is given that the random variable follows a binomial distribution with n=6 and p=0.9.

Q: Aaron, as a fifteen-year-old, established a mean time of 16.43 seconds for swimming the 25-yard…

A: It is given that the mean time for swimming the 25-yard freestyle is 16.43 seconds and standard…

Q: The mean life of a battery is 50 hours with a standard deviation of 6 hours. The manufacturer…

A:

Q: large insurance company wanted to estimate μ, the mean claim size (in $) on an auto insurance…

A: Introduction: Estimation of Population mean( μ): The most fundamental point and interval estimation…

Q: For the United States, the mean monthly Internet bill is $32.79 per household (CNBC,  January 18,…

A: Given  μ=32.79 n=50, x̄=30.63, σ=5.60

Q: 5. The fully-grown green iguana is about 14.2 inches in length on average, with a standard deviation…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: doctor wants to determine if a special diet increases the birth weights of babies. The mean birth…

A:

Q: The men rent for a one bedroom apartment without a doorman in Manhattan is $2699. Assume the…

A: As per our guidelines we suppose to answer three sub parts.

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: The energy information Administration reported that the mean retail price per gallonof regu lar…

A:

Q: according to the US census bureau,the mean of the commute time to work for a resdient of…

A: It is an important part of statistics. It is widely used.

Q: A machine produces electrical components. 99.7% of the components have lengths between 1.176 cm and…

A: Given 99.7% components length lies between 1.176 and 1.224 m Using empericals rule we know that…

Q: 500 freshmen at Arundel University took part in a math comprehension test. The scores were normally…

A: From the provided information, Mean (µ) = 75 Standard deviation (σ) = 7 Let X be a random variable…

Q: The mean finish time for a yearly amateur auto race was 185.55   minutes with a standard deviation…

A: We have to find given z score....

Q: The head of maintenance at XYZ Rent-A-Car believes that the mean number of miles between services is…

A: Solution: Let X be the number of miles between services. From the given information, X has mean…

Q: A football coach claims that the average weight of all the opposing teams’ members is 210 pounds.…

A: Consider that μ is the true average weight of all the opposing teams’ members.

Q: According to the Nielsen Company the mean number of TV sets in a US household in 2013 was 2.24.…

A: Let X is the number of TV sets in US households.

Q: A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A sample of…

A: Given, A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A…

Q: 6.)  A survey found that 21% of Americans watch the fireworks on the 4th of July from their TV.  If…

A: n = 80 p = 0.21   Mean = np = 0.21 x 80 = 16.8   The standard deviation is given by σ = npq σ = 80 x…

Q: A professor believes that, for the introductory art history classes at his university, the mean test…

A: Given Data : For evining classes x̄1 = 85.6 σ1 = 4.6 n1 = 250 For…

Q: c) What are the mean and standard deviation of the number of incorrect responses? (Give a reason)

A: Given:   Number of questions = 30 X = Number of correct responses Mean of X = 21 Standard deviation…

Q: The average rancher has a mean 2500 head of cattle. After a vegetarian riot in Montana, the hope is…

A: Our sample mean(x-bar) = 2458 and standard deviation(s) = 88 sample size(n) = 26 Our null…

Q: 1. Bob made 116 on his accounting midterm and 82 on his biology midterm. For the accounting midterm,…

A:

Q: The American Automobile Association (AAA) reported that families planning to travel over the Labor…

A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3…

Q: Grace Floral Shop claims that their average daily earnings is $497. An auditor wants to determine…

A: From the provided information, Sample size (n) = 100 Sample mean (x̅) = 495 Sample standard…

Q: The mean finish time for a yearly amateur auto race was 187.08 minutes with a standard deviation of…

A:

Q: Suppose this average cost was based on a sample of 55 persons who had been involved in car crashes…

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: Many families in California are using backyard structures for home offices, art studios, andhobby…

A: Let us consider X be a random variable which denotes the cost of shingled backyard structure which…

Q: A nutritionist claims that the mean tuna consumption by a person is 6 pounds per year. A sample of…

A:

Q: A class has an equal number of boys and girls. The boys all got 78% on a test and the girls all got…

A: From the provided information, Boys got 78% on a test and girls got 84%. Let n = number of girls =…

Q: 6) A music industry professional claims that the average amount of money that an average teenager…

A: Given that  Hypothesized Population Mean (\mu)(μ) = 5050 Population Standard Deviation…

Q: A group of high school students was asked how many hours per week they thought would be reasonable…

A: Formulae : where , x is midpoint of class Midpoint = ( lower limit + upper limit)/2 f is frequency…

Q: A second species of extra-terrestrial has a mean height of 71cm and a standard deviation of 5.3cm.…

A:

Q: claims that Chip Ahoy Cookies have an x ̅=28.67 per cookie with a SD=2.67. Assuming this information…

A: Given data,Mean x=28.67sd    =2.67  what is the population parameter for the standard deviation?

Q: The average rancher has a mean 2500 head of cattle. After a vegetarian riot in Montana, the hope is…

A: State the hypotheses That is, there is no evidence to conclude that average rancher has a mean head…

Q: The mean finish time for a yearly amateur auto race was 185.81 minutes with a standard deviation of…

A:

Q: The mean IQ of 200,000 current and past University of Manitoba students has been found to be 81.9.…

A: Given: Population mean μ=81.9 Population standard deviation σ=13.1 Number of people in 2016 = 29987…

Q: Airline companies are interested in the consistency of the number of babies on each flight, so that…

A: Let σ2 denotes the population variance of the number of babies on airplanes. The airline executive…

Q: Seven millionaires with an average net wealth of $47 million with a standard Deviation of $10…

A: Solution: Let X be the net wealth. From the given information, x-bar=$47 million, S=$10 and n=7.

Q: The Real Estate Group NY reports that the mean monthly rent for a one-bedroom apartment without a…

A: Given μ=2788σ=454n=110

Q: A bottled water distributor wants to determine whether the mean amount of water contained in​…

A: Given information: x¯=0.992σ=0.02μ=1n=50

Q: A college admissions officer believes that students enrolling from Shawnee school District have…

A: Solution: Given information: n1=30 Sample size of Shawnee school Districtn2=30 Sample size of West…