The Department of Transportation of the State of New York claimed that it takes an average of 200 minutes to travel by train from New York to Buffalo. To test if the average travel time differs from 200 minutes, a random sample of 40 trains was taken and the average time required to travel from New York to Buffalo was 188 minutes, with a standard deviation of 28 minutes. What is the p-value for this test? Select one: a. 0.0160 b. 0.1294 c. 0.0099 d. 0.0058

Q: Do consumers spend more on a trip to Target compared to Walmart? Suppose researchers interested in…

A: The question is about hypo. testing Given : Randomly selected no. of target customers ( n1 ) = 80…

Q: he sodium content of a popular sports drink is listed as 220 mg in a 32-oz bottle. Analysis of 10…

A: Given, Sample mean (x-) = 228.2 mg Population mean (μ)= 220 mg sample size (n)= 10 sample  S.D. (s)=…

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

A:

Q: The mean finish time for a yearly amateur auto race was 187.43 minutes with a standard deviation of…

A: Given information- Population mean, µ = 187.43 minutes Population standard deviation, σ = 0.363…

Q: A humanities professor assigns letter grades on a test according to the following scheme. A: Top…

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

Q: Given a sample mean of 94.3, a sample size of 6, test the hypothesis that the value of the…

A: xbar = 94.3 n = 6 mu = 100 s = 12.5

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

A: We have to find test statistics...

Q: In a national survey, middle school students report spending 3.1 hours per week on homework. Mr.…

A: μ=3.1n=24α=0.1σ=1.9x=3.4

Q: The weight of trucks traveling on a particular section of I-475 has a population mean of 15.8 tons…

A: Central limit theorem: The central limit theorem implies that the distribution of the sample means…

Q: The amount of miraculin produced in a hybrid tomato plant had a mean of 105.3 micrograms per gram of…

A:

Q: The average hours of sleep on a weeknight was 6.9 hours with a standard deviation of 1.5 hours. What…

A: Given that Mean = 6.9 and Standard deviation = 1.5 Formula z = (x - mean)/ SD

Q: winter months in Virginia have a mean of 62o F. A meteorologist in southwest Virginia believes the…

A: We have given that  Sample size n= 30 Sample mean = 59 Standard deviation = 6.21 P-value = 0.007

Q: The store manager took a random sample of 100 customers to determine whether or not the mean waiting…

A: What is the appropriate test to use for this problem? A. One sample z-test  What is the observed…

Q: There are 559 full-service restaurants in Delaware. The mean number of seats per restaurant is 99.2.…

A: From the given information, the population mean is 99.2 and the population standard deviation is 20.

Q: The standard deviation of math test scores at one high school is 16.1. A teacher claims that the…

A: Solution To find p value we will use chi square distribution.

Q: A group of 3,800 student take a math test. The scores arenormally distributed with a mean of 68 and…

A: The total number of students, N who took the math test is 3800. Consider X be a random variable…

Q: Nationwide, the mean amount of sales each week at Lowe’s store is normally distributed with a mean…

A: Determine the sales that the store has to have in order to not be closed. The sales that the store…

Q: The cost of unleaded gasoline in the Bay Area once followed an unknown distribution with a mean of $…

A:

Q: he Iowa Department of Transportation repaired hundreds of bridges in 1993. To check the average cost…

A:

Q: Sarah works for a coffee company. The farmers who supply the company spray Chemical X as a…

A: a) The statistical power of the current sampling scheme is calculated as follows, Thus, the…

Q: the mean number of minutes for app engagement is 8.2. suppose the standard deviation is 1 minute.…

A:

Q: A trucking company determined that the distance traveled per truck per year is normally​…

A:

Q: A company finds that for its 12 ounce cans of soda, the actual amount of soda inside is Normally…

A: Solution-: Given: μ=12,σ=0.25 We find x value such that P[X<x]=0.15

Q: In a random sample of 8 cell​ phones, the mean full retail price was ​$521.70 and the standard…

A: A random sample of 8 cell​ phones, the mean full retail price was ​$521.70 and the standard…

Q: Mens' heights are normally distrubted with a mean of 68.3 inches and a standard deviation of 2.7.…

A:

Q: Students took a college math placement exam with a mean of 200 and a standard deviation of 12. Using…

A: Given that, μ=200σ=12

Q: Use your own sample mean and sample standard deviation. A nutrition store in the mall is selling…

A: Testing the hypothesis about a population mean using the Z statistic σ known using following steps…

Q: Do political science classes require the same amount of writing as history classes? The 45 randomly…

A: Given: Sample 1   Sample 2   n1 45 n2 56 x̅1 15.7 x̅2 12.8 s1 3.3 s2 5.5 α=0.10

Q: The heights of a pediatrician’s 200 three-year-old females are normally distributed with mean 38.72…

A: We have to find 75th percentile.

Q: Coca-Cola has a manufacturing process that meets the requirements that the standard deviation of…

A: A)   Consider that σ is the population standard deviation of volume.   The null and alternative…

Q: The number of chocolate chips in a popular brand of cookie is normally distributed with a mean of 22…

A: given data  normal distribution μ = 22 chocolate chips per cookieσ = 3.1 chocolate chips per cookie…

Q: A researcher is interested in testing if participation in an after-school program reduces school…

A: The sample size n=35 The sample mean x¯=4.78  The sample standard deviation s=1.11

Q: The average weight of a 12 year old boy in the United States is 96 lb. In a sample of 36…

A: The objective of this question is to determine if the average weight of the boys at the doctor's…

Q: Assume that credit card FICO scores are normally distributed. A sample of 18 individuals was taken…

A: Given: Sample size (n) = 18 Sample mean (x̄) = 660.3 Sample standard deviation (s) = 95.9 The level…

Q: During an economic crisis, the average value of homes in a community of 36 homes lost $9347 with a…

A: Given information Hypothesized mean µ = $8880 Sample size (n) = 36 Mean x̅ = $9347 Standard…

Q: The weights of ripe watermelons at Mr. Pakwan's farm are normally distributed with a standard…

A: We have to use CLT to find out the unknown mean.

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: What is the null hypothesis? What is the alternative hypothesis? Which of the following test will be…

A: Given that  The mean and standard deviation for the sales division are 10.26 and 8.56,respectively.…

Q: 751 body temperature measurements were taken. The sample data resulted in a sample mean of 98.3°F…

A:

Q: Steve believes that his wife's cell phone battery does not last as long as his cell phone battery.…

A:

Q: A person records the speeds of various cars as they drive past their house. After 100 readings, the…

A: Given,mean(μ)=23.84standard deviation(σ)=3.56

Q: Among US Households, only 15% have a landline phone.  A telemarketing campaign will involve a SRS of…

A: Given data, p=15%=0.15 n=2250 standard deviation of X=?

Q: The diameter of a mason jar is 3 inches but can be as large as 3.05 inches and as small as 2.95…

A: From the question we'll find the value of Cpl. While we have given the UCL = 3.05 and LCL = 2.95…

Q: Students took a college math placement exam with a mean of 200 and a standard deviation of 12. Using…

A:

Q: Random samples of people from Maine, Texas, and Rhode Island have been given a scale that measures…

A: ANOVA:   ANOVA technique is used for comparing more than three groups. It is used for observing the…