A professional rock climber claims that he can climb a particular mountain within half an hour. From a random sample of 25 attempts, the rock climber averaged 30.5 minutes with a standard deviation of 3.9 minutes. Is there sufficient evidence to suggest that the climber's claim is incorrect at a significance level of 10 percent? Apply the P- value approach.

Q: The chamber of commerce of a Florida Gulf Coast community advertises that area residential property…

A: State the hypotheses.

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

A: Given that, The distribution of the number of phone calls answered each day, Mean = 48 Standard…

Q: students were given a standardized reading test. The average score of the students in the treatment…

A:

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 large university reports that the mean salary of parents of an entering class is $111,500. To see…

A: We have given that Mean(µ) = 111500Sample size (n) = 428 Sample mean (x̅) = 109000Standard…

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: A tool company claims that the mean number of defective screws they produce per box is 72. The mean…

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Q: According to a dietary study, high sodium intake may be related to ulcers, stomach cancer, and…

A:

Q: A sample of assistant professors on the business faculty at state-supported institutions in Ohio…

A: It is given that the mean is 72000 and the standard deviation is 3000.

Q: The waiting time for patients at a local walk-in health clinic follows a normal distribution with a…

A: n = sample size = 50 x̄ = sample mean  = 14.25 Minutes μ = population mean = 15 Minutes σ =…

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: Hinton Press hypothesizes that the average life of its largest web press is 14,500 hours. They know…

A: Given: x¯=13000Population standard deviation σ=2100 n=25   Null and Alternate hypothesis: H0:…

Q: A local supermarket spent $250,000 remodeling. Prior to remodeling, the average daily receipts were…

A: From the provided information, Sample size (n) = 18 Sample mean (x̅) = $59800 Standard deviation (s)…

Q: A hospital administrator believes that the standard deviation of the number of people using…

A:

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: 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: 2) Suppose that a manufacturer of laptop batternes claims that his product last more than 950 hours.…

A: Given : sample size, n = 45 sample mean, x̄ = 925 population standard deviation,σ=…

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: 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: A telecommunications company claims that households receive an average of 40 telephone calls per…

A: From the given information, μ=40 calls σ=5 callsn=35x=36α=0.10

Q: A trucking firm claims that the weights of trucks it sends over a municipal road is 25,000 kg. Test…

A: Given : Claim : The weights of trucks it sends over a municipal road is 25,000 kg.

Q: A recent study of 1,215 randomly selected middle school students revealed that the average number of…

A: From the provided information, Mean (µ) = 180 minutes Standard deviation (σ) = 45 minutes X~N (180,…

Q: Suppose that a manufacturer of laptop batteries claims that his product last more than 950 hours.…

A: Given data : sample size, n = 45 sample mean, x̄ = 925.0 sample standard…

Q: A sports science group claims that due to improved training methods, professional cyclists burn a…

A:

Q: In a particular community, it is claimed that the mean household water usage for a particular month…

A:

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

A:

Q: The mean nicotine content of a simple random sample of 25 unfiltered king-size cigarettes is 1.26…

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

A: Solution-: Given: For Man: For Women: We find who is relatively taller, a 75 inch man or 70 inch…

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

A: The independent variable is receptionists. The random variable is number of phone calls answered…

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: 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: In attempting to improve student services, a college investigates its registration process and finds…

A: If x¯1 and x¯2 are the means of two independent sample of size n1 and n2 with sample deviation s1…

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: 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: Nationally, patients who go to the emergency room wait an average of 6 hours to be admitted into the…

A:

Q: A microwave company claims that their microwaves can pop popcorn in under 2.25 minutes. After 134…

A: Ho: their microwaves can pop popcorn in under 2.25 minutes.  H1: their microwaves can not pop…

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

A: Yes, There is enough evidence to reject the directors claim at 5% l.o.s.

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: In a study of consumer credits, 20 randomly selected credit holders were surveyed, and the mean…

A:

Q: In a particular community, it is claimed that the mean household water usage for a particular month…

A: Hypothesis testing is conducted for the parameters of the population like population mean,…

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

A:

Q: In a study of consumer credits, 22 randomly selected credit holders were surveyed, and the mean…

A:

Q: For a sample of 60 women taken from a population of over 5,000 enrolled in a weight- reducing…

A: Given, n = 60 x¯ = 101, s = 42, α=0.02

Q: In a random sample of 32 fossilized male femurs found at the Gronsalen Barrow, the mean weight was…

A: