college student is conducting a research in which he tests the claim that the nearby community contains family units of average size of 3.3 people. A random sample of 24 families from the community project showed that there is an average of 4.3 people per family unit and standard deviation of 1.3. Does this indicate that the average size of a family unit in the community is different from the national average of 3.3? Use a 0.05 level of significance to test this claim. (Use the one sample mean t-test)

Q: A new kind of typhoid shot is being developed by a medical research team. The old typhoid shot was…

A: A)   The claim of the problem is the new typhoid shot has a smaller variance of protection times.…

Q: A well know Statistical Institution claims that the average College tuition for a law degree costs…

A: Let μ denotes the population average College tuition for a law degree costs. The sample size is 50,…

Q: A car dealer claims that the average price of 2012 Ford Taurus is more than $9000. The population…

A: Sample size n =33 Sample mean=9100 Population standard deviation =450

Q: A used car dealer says that the mean price among all 2005 Honda Pilot LX's for sale in the United…

A: GivenMean(x)=23000standard deviation(s)=1113sample size(n)=14significance level(α)=0.05

Q: A new kind of typhoid shot is being developed by a medical research team. The old typhoid shot was…

A:

Q: An online survey company claims their surveys take on average less than 20 minutes to complete.…

A: Ans: The test we performed came to the opposite conclusion, so we made Type I error.  By the larger…

Q: what is the probability that more than 82% of the 500 respondents say their jobs were sometimes or…

A: Let p be the proportion of respondents said that their jobs were sometimes or always stressful.…

Q: An officer claims that the average daily water usage in a certain town is more than 1500 litres per…

A:

Q: A new kind of typhoid shot is being developed by a medical research team. The old typhoid shot was…

A:

Q: The telecommunications manager at Lowell Call Center is concerned about the average difference in…

A: Given that, The telecommunications manager at Lowell Call Center is concerned about the average…

Q: During 2008, college work-study students earned a mean of $1478. Assume that a sample consisting of…

A: Given that, sample size (n) = 25 sample mean (Xbar) = 1503 Population mean (μ) = 1478 standard…

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: snip. Ships are rated A travel magazine conducts an annual survey on a 10 point scale, with higher…

A: The use of Confidence intervals extends beyond estimating specific parameters, as it can also be…

Q: A company claims that, the mean battery life of their cell phone is at least 5 hours and standard…

A: Given,sample size(n)=25sample mean(x¯)=4.8standard deviation(σ)=0.5α=0.04H0:μ<5H1:μ≥5

Q: According to a study the average waiting time at the drive thru window at Mc Donald as measured from…

A: We have given that  Sample size n =25 Sample mean =3.84 Standard deviation =0.4

Q: According to a study the average waiting time at the drive thru window at Mc Donald as measured from…

A: Givensample size(n)=25Mean(x)=3.84standard deviation(s)=0.4α=0.05

Q: According to the National Association of builders, the average cost of building a standard warehouse…

A: From the given information, Sample mean (M) = $122.57 Sample size (n) =36 Standard deviation (s) =…

Q: Cushman and Wakefield reported that the average annual rent for office space in Tampa was $17.63 per…

A:

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: Given data,n1=40x1=46.6σ1=4.6n2=45x2=48.8σ2=2.4Compute value of test statistic?

Q: A dean at BUC claims that the average age of the students in this college is 25. A random sample of…

A: Note: Thank you for the question. Since it is not mentioned the standard deviation is population…

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: Is there a doctor in the house? A market research firm reported the mean annual earnings of all…

A: Given information:n

Q: An agriculture company wants to know if a new type of fertilizer has improved crop yield or not.…

A: Given data : sample size, n =17 sample mean, x̄ = 30.4 sample standard…

Q: The average cost of ttution,room and board at small private liberal arts colleges is reported to be…

A:

Q: One group of 50 students took a distance learning class, while another group of 25 took the same…

A: Solution : Given data, Sample Mean 1 x1 =54.6 Population Standard Deviation 1(\sigma_1)(σ1​) =12.4…

Q: fitness center claims that its members lose an average of 15 pounds or more the first month after…

A:

Q: It is claimed that an automobile is driven on the average more than 20,000 kilometers per year. To…

A: From the provided information, Sample size (n) = 100 Sample mean (x̅) = 23500 kilometers Standard…

Q: Mr. Coca-Cola wishes to estimate the mean volume of all the 12-ounce bottles in his plant using a…

A: Sample size : Sample size is the part of population. The formula for the Calculation of sample size…

Q: It is claimed that the automobile is driven on the average less than 20,000 kilometers per year. To…

A: Given: Claim: Automobiles is driven on the average less than 20,000 kilometers per year H∘:μ≥20000,…

Q: According to a research study, parents with young children slept 7 hours each night last year, on…

A:

Q: imed that personal vehicle is driven 25,000 kilometers per year. Would you agree with this claim if…

A: given data, claimed that personal vehicle is driven 25,000 kilometers per year.claim:…

Q: A new kind of typhoid shot is being developed by a medical research team. The old typhoid shot was…

A:

Q: n a scientific study conducted by the Dax Science Lab on Deep Space Nine, 41 male rats were sent to…

A:

Q: A recent report by the American Medical Association stated the average annual salary of…

A: given data claim : μ > 189121σ = 26975n = 64x¯ = 198630p value = ?

Q: researcher wants to test the claim that the average height of adult men in a certain population is…

A: To test the hypothesis, we'll use a one-sample t-test. The null hypothesis is that the population…

Q: One group of 50 students took a distance learning class, while another group of 25 took the same…

A: Solution : Given : n1 = 50              n2  = 25             x¯1 = 54.6             x¯2 = 60.6…

Q: A nurse in the immunization clinic claims that the mean age at which children start walking is 12.5…

A: The null and alternative hypothesis is obtained below:                        The claim of test is…

Q: A recent national survey found that high school students watched an average (mean) of 7.7 movies per…

A: Given information- Population mean, μ = 7.7 Population standard deviation, σ = 0.7 Sample size, n =…