is there a doctor in the house? A market research firm reported the mean annual earnings of all family practitioners in the United States was $178,258 . A random sample of 47 family practitioners in Los Angeles had mean earnings of x $192,890 with a standard deviation of $43,117 . Do the data provide sufficient evidence to conclude that the mean salary for family practitioners in Los Angeles is greater than the national average? Use the a 0.01 level of significance and the p-value method with the Critical Values for the Student's t Distribution Table. (a) State the appropriate null and alternate hypotheses. (b) Compute the value of the test statistic. (c) State a conclusion.

Q: In a latest survey conducted by a 3rd party company, excessive intakes of sodium may lead to ulcers,…

A: The sample size is 20, sample mean is 244, sample standard deviation is 24.5.

Q: Cris Elevators Inc. claims that the average cost of elevator installation and repair is P228,760. A…

A: We have given that  Sample size n=60 ,sample mean xbar=227880 And standard deviation s=3000 ,alpha…

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

A: Given data,For Man:μ=69.4σ=3.2Age X=75For Woan:μ=64.5σ=3.8Age X=70

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: A tire manufacturer has been producing tires with an average life expectancy of 26,000 miles. Now…

A: Solution: n= 8 Sample size  μ= 26  Population mean  x (x-x) (x-x)2 28 1.25 1.5625 27 0.25…

Q: To compare the battery life of Duracell versus Energizer batteries, a sample of 140 Duracell…

A: Given: n1 = 140 X1 = 345 S1 = 95 n2 = 125 X2 = 280 S2 = 86 α = 0.01 Formula Used: Test-statistic t =…

Q: The owner of a country club maintains the average number of rounds of golf played per weekend is at…

A: Given,sample size(n)=52sample mean(x)=88standard deviation(S)=25α=0.01

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

A: We have given that  Sample size n =350 Sample mean = 8745  Population standard deviation =1200

Q: A recent study of debt among college graduates reported that the average debt accumulated by…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

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: 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 survey recently reported that the mean national annual expenditure for inpatient and outpatient…

A: To test:H0:μ=5423H1:μ>5423

Q: Do people who exercise regularly have a cholesterol level less than the recommended level of 140? A…

A: The summary of statistics is,

Q: In a recent poll, the Gallup organization found that 45% of adult Americans believe that the overall…

A: Binomial distribution:A random variable Y denoting the number of successes in n trials for…

Q: The amount of money raised by Clayton State teams for the Statistics Games is normally distributed,…

A: As per our guidelines we are suppose to answer only one question. Given,mean(μ)=$360standard…

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: A tire manufacturer has been producing tires with an average life expectancy of 26,000 miles. Now…

A: Given that a tire manufacturer producing tire with an average life expectancy of μ=26 ( in thousand…

Q: According to the Vivino website, suppose the mean price for a bottle of red wine that scores 4.0 or…

A: Solution (a) Let μ denotes the population mean price in Providence for a bottle of red wine that…

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

A: Given,sample size(n)=18sample mean(x¯)=25620standard deviation(s)=680α=0.05

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: A Web-based retailer wishes to measure whether pay-per-click advertising using Google AdWords…

A: Since you've posted a question with multiple subparts, we will solve the first three complete…

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: A used car dealer says that the mean price of used cars sold in the last 12 months is at least…

A: Given information- Average starting salary, μ = $21,000 Sample size, n = 14 Degree of freedom, df =…

Q: the chamber of commerce of a florida gulf coast community advertises that area residential property…

A: The average weight has gone down. H0 : μ ≤125000. Alternative hypothesis: Ha :μ  >125,000 Since…

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 amount of money raised by Clayton State teams for the Statistics Games is normally distributed,…

A: Chebyshev's theorem and empirical rule are used to calculate the percentages of data lies within…

Q: A grocery store's sales experience indicates that its daily apple sales follow a normal distri-…

A: (b) Obtain the cut off point for the top 10% of all daily apple sales. The cut off point for the top…

Q: A recent study of debt among college graduates reported that the average debt accumulated by…

A: x1 = 27800 x2 = 11200 n1 = 80 n2 =245 s1 = 2087 s2 = 2101

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

A: Given: For Man:      Avg = 69.4      SD = 3.2 For Women:       Avg = 64.3        SD = 3.9 Who is…

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

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

Q: A medical researcher is interested in the prenatal care received by pregnant women in inner cities.…

A: A sample of 20 randomly selected women with children on the streets of Baltimore and the average…

Q: The manager of a local gym has determined that the length of time patrons spend at the gym is a…

A:

Q: According to the Vivino website, the mean price for a bottle of red wine that scores 4.0 or higher…

A: We have given that  Sample size n=56 , standard deviation s=12 ,sample mean xbar=30.15

Q: A job placement director claims that the average starting salary for nurse is $25000. A sample of 15…

A:

Q: In the past, patrons of a cinema complex have spent an average of $5.25 for popcorn and other…

A: Given Information: In the past, patrons of a cinema complex have spent an average of $5.25 for…

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

A: State the hypotheses.

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: city, the average 20- to 29-year old man is 69.4 inches tall, with a standard deviation of 3.1…

A: We have given that,  Let X be the random variable from normal distribution with mean (μ) = 69.4,…

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: 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: 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: 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: An editor for a large book distributor claims the mean time required to write a textbook is at least…

A:

Q: A consumer protection group suspects that a particular 285-gram packages of tofu actually weighs…

A:

Q: A travel analyst claims that the mean price of a round trip flight from New York City to Los Angeles…

A: Solution:

Q: On an Intelligence Quotient test with a mean score of 100 and a standard deviation of 15, Patrick…

A: The mean is μ=100 and standard deviation is σ=15. The score is x=85 so it follows:…

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…