VII. The NYC MTA claims the average wait time for an F train after midnight is less than 21 minutes. A sample of 15 commuters are polled and it is determined the average wait is 24 minutes with a standard deviation of 9 minutes. Do we accept the MTA's claim?

Q: 3. The weight of a regular bag of new powdered milk are normally distributed with mean 500 grams and…

A: We have given that.   X~N( μ , ?^2 )   μ =500, ? =?   Z-score =( x - μ )/?

Q: Suppose I surveyed a random sample of commuters who had jobs in Manhattan, 51 whose primary mode of…

A: Given information: n1=51M1=40,000s1=5100n2=80M2=60,000s2=8000 a) the difference of the sample means:…

Q: If 80% ·of an ore stockpile consists of copper ore particl~s (the material or value) and 20% of…

A:

Q: 4. Suppose that in the past years the average price per square foot for warehouses in Subic has been…

A: One sample t-test: The one -sample t -test is used to determine whether the mean of sample differs…

Q: The number of Grade 11 learners per section in Kasiglahan Village Senior High School has a mean of…

A: The population mean is 56.3. The population standard deviation is 8.6. We have to write which…

Q: 2. A Flemish student organisation claims that the average undergraduate student loan debt at a…

A: Hello there!! Thank you for the question, As per the honor code, we are allowed to answer three…

Q: 31.The National Center for Health Statistics reports that the mean systolic blood pressure for males…

A: As the population standard deviation is not known, we will use the z test. As it is required to test…

Q: 1. The Department wants to know if the average working hours in preparing a full meal is 3 hours.…

A: According to guidelines we solve only first question when given questions are different.

Q: certain city, a researcher wishes to determine whether the average income of the residents is…

A: Given

Q: estimate is within .04 ounce of the population mean?

A: Given that  Confidence level (C) = 99% Standard deviation of amount of detergent in jugs ( σ)= 0.20…

Q: According to data from the 2010 United States Census, 64.2% of Americans in Susanville, CA were…

A: 64.2% of Americans in Susanville, CA were male, p = 0.642 Sample size, n = 100 Among the sample, 54…

Q: 2. In a certain barangay, a researcher wishes to determine whether the average expense of the…

A: Given,sample size(n)=15sample mean(x¯)=P 8500standard deviation(S)=P 1500α=0.01

Q: 10. A measure of the right atrial pressure (mm Hg) was made for cardiac patients who were given…

A: The appropriate test statistic to conclude the indifference between the mean right atrial pressure…

Q: 4) The admitting office at Sisters of Mercy Hospital wants to be able to inform patients of the…

A: Given that: Population mean, μ=1240 Sample mean, x¯=1491 Standard deviation, s=342 Sample size, n=20…

Q: 7. The average local cell phone call length was reported to be 2.27 minutes. A random sample of 20…

A: Given data: Mean =2.27 minutes Sample size = 20 Sample average  = 2.98 Sample standard deviation =…

Q: 3) A job placement director claims that the average starting salary for nurse is $25000. A sample of…

A:

Q: director

A:

Q: 1- Applying for a specific job requires obtaining the mark of 500 in the contest exam. If 16 persons…

A:

Q: 4.) In order to determine the effect of music on the speed of students in answering exams, an…

A:

Q: 10 The distribution of the weights of those rowing in a very large regatta may be taken to be normal…

A: Let X be the weights of rowers, that follows normal distribution with µ=80 kg and σ = 8 kg. Let Y =…

Q: 1. A business consultant wanted to investigate if providing day-care facilities on premises by…

A: Let, 1: Provided day-care facilities 2: Not provided day-care facilities Given:

Q: The Orange County Supervisor claims that full-time salaried employees in her county have a mean…

A: Given:

Q: 5. It is known that the mean systolic blood pressure for Canadian males aged 35 to 44 years is 128,…

A: Solution: Given information: n= 72 Sample size x=126.07  Sample mean μ= 128 Population mean σ= 15…

Q: 8) A local supermarket spent $250,000 remodeling. Prior to remodeling, the average daily receipts…

A:

Q: 3. The U.S. Department of Agriculture claims that the mean consumption of bottled water by a person…

A: Claim : the mean consumption of bottled water by a person in the United States is 28.5 gallons per…

Q: 2. A scrap metal dealer claims that the mean of his cash sales is "no more than $80," but an…

A: Given that: Population mean(u) = $ 80 Sample mean = $ 91 SAMPLE standard deviation = $21 Sample size…

Q: ÁČTÍVITY 2: Cris Elevators Inc. claims that the average cost of elevator installation and repair is…

A: Given : n(sample size)=60 Alpha(level of sig.)=0.05 s(sample stand. dev.)=3000

Q: 2. A teacher claims that the learning performance of male and females students in Mathematics is…

A: Testing of hypothesis is a rule which, when the sample values have been obtained, leads to a…

Q: 2. A manufacturer of mugs packages them in boxes of 100.lt is shown that, on the average, mugs weigh…

A: Solution

Q: 1. The average height of all previous contestants in a beauty pageant has been 180 cm with a…

A: The given mean for all previous contestants is 180 cm and standard deviation is 5 cm. That is,…

Q: 3. Based on information from the U.S. Census Bureau, the mean travel time to work (mins), for all…

A: A hypothesis test can be used to make conclusion about the population mean. The null hypothesis…

Q: The manager of a certain TV station claimed that the average rating of people watching their…

A: We have given that  Hypothesized population mean = 60.5  sample size  =35 Standard deviation =13.5…

Q: c. Analyzing delivery records for 18 customers from "Jalwa" tailoring company, you found their mean…

A: Hypothesis test used estimate whether there is any mean significant difference between the sample…

Q: 7. The student academic group on a college campus claims that freshman students study at least 2.5…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 3. A business consultant wanted to investigate if providing day care facilities on premises by…

A: given that,mean(x)=6.4standard deviation , s.d1=1.2number(n1)=50mean(y)=9.3standard deviation, s.d2…

Q: # 6- A set of data items is normally distributed with a mean of 90 and a standard deviation of 5.…

A:

Q: 2) A job placement director claims that the average starting salary for nurse is $26000. A sample of…

A:

Q: 4. Suppose a locally owned coffee shop had an average daily revenue of $4,191 before some ordinance…

A: Solution To test the claim we will use t test for single mean.

Q: The average undergraduate cost for tuition, fees, and room and board for two-year institutions last…

A: Given, n =  μ = 13252x¯ = 15560s = 3500α = 0.01

Q: 3. The sample mean weight of 65 adult African elephants was measured to be 14,325.62 pounds, with a…

A: mean=14,325.65

Q: 3- At a computer manufacturing company, the actual size of a particular type of computer chips is…

A: We have to find required sample mean.

Q: 7.Suppose that University of Pennsylvania advertises that its average class has 35 or fewer…

A:

Q: 2) A restaurant association claims that the average amount a family spends per year eating out is…

A:

Q: 1. A survey of National Capital Region finds the average commute time of employees on one way is 30…

A: 1. Step 1: Let μ be the population mean. The average commute time of employees on one way is 30…

Q: 4. A line for tickets to a local concert had an average (mean) waiting time of 20 minutes with a…

A:

Q: 1. It is claimed that the average weight of a bag of biscuits is 250 grams with a standard deviation…

A: Given  μ=250, σ=20.5, n=50, x̄=240, ɑ=0.05 We want to test the hypothesis.

Q: 2. A researcher claims that the average salary of an engineer in the Philippines is more than…

A: Given that  2) Population mean μ =50700 Sample size n =60 Sample mean =41000 Standard deviation…

Q: 1.) It is claimed that the average performance of newly graduated nurses from the recent board exam…

A: Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: 3. An extensive study of the cost of health care in the United States presented data showing that…

A: