The average (mean) amount of time that a manager at the Cimaron Valley 7.2 Department of Human Services spends in the annual performance review with an employee is 31.3 minutes, with a standard deviation of 5.7 minutes (normal distribution). What percentage of the annual performance reviews in the depart- ment take between 24.9 and 36.1 minutes? Between 26.4 and 30.6 minutes? Between 32.0 and 37.5 minutes? What percentage of the annual performance reviews take more than 40 minutes? What percentage take less than 20 minutes?

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: Students at Lake Mean PE class ran a 5K with a mean run time of 31 minutes and a standard deviation…

A: Given that Mean = 31 standard deviation = 4  We need to find probability between 23 and 27…

Q: The number of plants pollinated by bees follows a normal distribution with a mean of 6,543 plants…

A:

Q: A manufacturer wanted to know if more coupons would be redeemed if they were mailed to the female in…

A: Solution: Given information: n=50 Sample size  xd= 1.5   Difference of sample mean sd= 4.75…

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: The waist girth of 2,500 employees in a large company follows the normal distribution with mean of…

A:

Q: An auditor, pressed for time and on a low budget, is concerned with account errors on customer…

A: The null and alternative hypotheses are;

Q: The results of a statewide exam for assessing the mathematics skills of realtors were normally…

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

Q: What is the degree of freedom between groups? What is the degree of freedom within groups? What is…

A: The provided information is There are 10 families in Makati and 12 families in Quezon. a=10, s=12…

Q: According to the Institute of Medicine, the tolerable upper level of sodium intake for adults and…

A: Solution :  Given : μ = 2300 mg             n = 14             x¯ = 2310              s = 38 mg…

Q: The cost of repairing a smart phone that is out of warranty follows a normal distribution with a…

A: Given that, The cost of repairing a smart phone that is out of warranty follows a normal…

Q: The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally…

A: Givenmean(μ)=1252standard deviation(σ)=129

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: Assume that the heights of men applying for Us Military training are normally distributed with a…

A: Given, Assume that the heights of men applying for Us Military training are normally distributed…

Q: At the 0.05 level of significance, is there evidence that the mean life is different from 375hours?

A: Here sample size n =64 Population standard deviation = 100 hours Sample mean = 350 hours Here claim…

Q: The average pre-school cost for tuition fees last year was P17,250. The following year, 20…

A: Given that  Population mean = 17250 Sample mean = 16150 Sample size (n) = 20  Alpha = 0.10. By using…

Q: The results of a statewide exam for assessing the mathematics skills of realtors were normally…

A: Obtain the score that does a realtor need in order to receive a certificate. The score does a…

Q: Is a weight loss program based on exercise just as effective as a program based on diet? The 52…

A: The question is based on hypo. testing. Given : Avg. weight of people who put on strict one year…

Q: In a certain city, the average 20- to 29-year old man is 69.4 inches tall, with a standard deviation…

A: Given information: Man Woman xM=75 inches.μM=69.4 inches.σM=3.0 inches. xW=70 inches.μW=64.5…

Q: Last year, the numbers of skateboards produced per day at a certain factory were normally…

A: Let ꬷ(x) be the cumulative distribution of the standard normal distribution

Q: The current production goals for the monthly production level of the cases are a mean of at least…

A: For Tampa, Florida location: H0: The population mean is at least 1,000 units per month. H1: The…

Q: In an article in the Journal of Management, Joseph Martocchio studied and estimated the costs of…

A: If the sample size (n) is large (greater than or equal to 30), then the sample mean follows normal…

Q: Assuming that the heights of college women are normally distributed with mean 65 inches and standard…

A: Solution: Let X be the heights of college women are normally distributed with mean μ= 65 inches and…

Q: The waist girth of 2,500 employees in a large company follows the normal distribution with mean of…

A:

Q: The advertising budgets of small stores in Los Angeles is normally distributed with a mean of $5,400…

A: It is given that mean and standard deviation are $5,400 and $2,100, respectively.Let the variable X…

Q: r feels that the mean hospital stay in 2002 should be less due to initiatives aimed at reducing…

A: We are given: μ=Population mean=7.1x¯=Sample mean=6.85s=Sample standard devitaion=7.01n=Sample…

Q: Company-owned Kentucky Fried Chicken restaurants in the United States have been reported as…

A:

Q: The distribution of average wait times in drive-through restaurant lines in one town was…

A:

Q: Suppose that employees at a large company have salaries that are normally distributed, with a mean…

A: We have given that, Let X be a random variable i.e. salaries of employees are normally distributed…

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: In a certain city, the average 20- to 29-year old man is 69.8 inches tall, with a standard deviation…

A: Mean (man)=69.8Standard deviation (man)=3.0Mean (woman)=64.1Standard deviation (woman)=3.9

Q: A report from 2010 indicates that Americans between the ages of 8 and 18 spend an average of μ = 7.5…

A: Given: Americans between the ages of 8 and 18 spend an average of μ = 7.5 hours per day distribution…

Q: A dairy farm uses the somatic cell count (SCC) report on the milk it provides to a processor as one…

A: Denote μ as the population mean SCC of all milk produced.

Q: The results of a statewide exam for assessing the mathematics skills of realtors were normally…

A: Given, The results of a statewide exam for assessing the mathematics skills of realtors were…

Q: The average cost of tuition plus room and board for a small private liberal arts college is reported…

A: State the hypotheses.

Q: The lifetimes of Brand A tires are distributed with mean 43,000 miles and standard deviation 4600…

A: Hi, you have posted multiple question in one time. As, per the guidelines i am obliged to answer…

Q: In a certain​ city, the average​ 20- to​ 29-year old man is 72.5 inches​ tall, with a standard…

A: z- score for a 75-inch man =  0.833 z- score for a​ 70-inch woman = 1.447

Q: Most graduate sWhat is the probability of an individual scoring above 500 on the GMAT?schools of…

A: Solution: Let X be the random variable defined as scores on the GMAT. It is given that the scores on…

Q: An office manager has received a report from a consultant that includes a section on…

A:

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

A:

Q: A cell phone company offers contract phones and non-contract phones.  In a sample of 40 contract…

A: Given that, In a sample of 40 contract subscribers, the mean yearly income was found to be $57,000…

Q: The results of a statewide exam for assessing the mathematics skills of realtors were normally…

A: Let us assume: X=the result of statewide exam for assessing the mathematics skills of realtors.…

Q: In an article about the cost of health care, Money magazine reported that a visit to a hospital…

A: Given data,μ=328σ=92P(X>500)=?

Q: A dairy farm uses the somatic cell count (SCC) report on the milk it provides to a processor as one…

A: Claim : The mean SCC of all milk produced at the dairy exceeds that in the previous report, 210,250…

Q: The number of cell phone minutes used by staff of DIT at Bowie State University follows a normal…

A: We have, X= The number of cell phone minutes used by staff of DIT at Bowie State university. Mean=…

Q: Suppose the mean net worth of the resi- dents of Sun City, a retirement community, is $611,000…

A:

Q: A researcher wished to compare the average amount of time spent in extracurricular activities by…

A: Disclaimer: According to our guidelines, we do not provide a hand-written solution. Here, I am…

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

A:

Q: According to the American Freshman, the number of hours that college freshmen spend studying each…

A: