4. A line for tickets to a local concert had an average (mean) waiting time of 20 minutes with a standard deviation of 4 minutes. If 2000 ticket buyers were in line, how many of them would expect to wait for more than 30 minutes?

Q: Suppose the annual employer 401(k) cost per participant is normally distributed with a standard…

A:

Q: If a population has a mean of 228.8 and a standard deviation of 35.5 then a sampling distribution…

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Q: An economist wants to find out if there is difference in the monthly expenses of families from…

A: Using t distribution

Q: 4. The average credit card debt for 500 college seniors is Php3762. If the debt is normally…

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Q: 2. The head of a school clinic in a certain elementary school wants to estimate the mean height (in…

A: Given that alpha =0.05,s.d =30 ,M.E = 4

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Q: 3. Suppose the mean blood glucose of a population of adults is 162 with a standard deviation σ=58.…

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Q: 6. A research article reported that for a random sample of 850 meal purchases made at fast food…

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Q: An advertising agency has stated that 20% of all television viewers watch a particular program. How…

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Q: 8. The length of an elephant's trunk is normally distributed with a mean of 175 cm and a standard…

A: Given, We need to find 10th Percentile P10

Q: What is the degree of freedom between groups? What is the degree of freedom within groups? What is…

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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: If gasoline in a certain part of the country has a mean price of $1.62 per gallon and a standard…

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Q: A group of 123 bunnies had a mean hopping distance of 48 inches and a standard deviation of 3.5…

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Q: In Hidalgo County, Texas, 80% of those eligible for jury duty were Mexican- Americans. Assuming that…

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Q: 2. The mean height of the grade nine students at a certain high school is 164 centimeters and the…

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Q: Suppose the average golfer drives the ball around 225.55 yards with a standard deviation of 8.82.…

A: Assume that the random variable x denotes the distance of balls drove by the golfer.

Q: 2. Assume that, among residents of a large (over 6,000) Florida subdivision, the population mean age…

A: From the given information, The mean age is 65 and standard deviation is 2 years.

Q: Assume that the heights of men applying for Us Military training are normally distributed with a…

A: Given, Assume that the heights of men applying for Us Military training are normally distributed…

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A: Given that

Q: 4. A researcher claims that the standard deviation of the numberof deaths annually from typhoons in…

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Q: 9. Suppose only the top 20 % of marks on a university entrance exam qualifies an application for…

A: Here we can use normal distribution to find the minimum marks to be in top 20%. If x are minimum…

Q: 4-A health maintenance organization (HMO) wants to estimate the mean length of a hospital stay. How…

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Q: 8. The mean life of a battery is 50 hours with a standard deviation of 6 hours. The manufacturer…

A: Disclaimer : Since you have asked multiple question, we will solve the one question for you. If you…

Q: An economist wants to find out if there is difference in the monthly expenses of families from…

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Q: Assume that the heights of men applying for military academy training are normally distributed with…

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Q: 4. In studying ocean conditions, the Bureau of Fisheries found that for one location, the August…

A: Given ,Mean μ = 83.6Standard deviation σ=24Let  x be temperature normally distributed

Q: According to the U.S. Department of Agriculture, Alabama egg farmers produce millions of eggs every…

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

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Q: director

A:

Q: Suppose the annual employer 401K cost per participant is normally distributed with a mean of $770.…

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Q: Suppose that that the average BMI of the patients at Beth Israel Deaconness Medical Center is 30…

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Q: Imagine that for those who meditate daily, the number of minutes in meditations has a mean 31 and a…

A: Given information- We have to find the number of persons is expected to meditate more than 38 mins…

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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: Suppose that the score on a reading test are normally distributed within a mean of 70 and a standard…

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Q: 4.15. If the local restaurants in a small town record an average of 92 customers a day, with a…

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Q: Suppose that the annual household income in a small Midwestern community is normally distributed…

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Q: Suppose that the daily viewing time is normally distributed with a mean of is 8.35 hours and a…

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Q: If we define a "rich" household as one whose after-tax income is at least 1.8 standard deviations…

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Q: 5. The quality control manager at a light bulb factory needs to estimate the mean life of a large…

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Q: If a student scored 77 points on a test where the mean score was 84.5 and the standard deviation was…

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

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Q: Suppose the distribution of typing speeds in words per minute for experienced typists can be…

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Q: Suppose that on a certain section of I-95, with a posted speed limit of 65 miles per hour, the…

A: Given,mean(μ)=72standard deviation(σ)=3

Q: 2. If the scores on an aptitude test are normally distributed with mean 500 and standard deviation…

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Q: Create a set of three numbers with a mean of 5 and a standard deviation of 5.

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Q: 4. A normally distributed set of 1,010 values has a mean of 103 and a standard deviation of 12.…

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Q: An economist wants to find out if there is difference in the monthly expenses of families from…

A: There are two independent samples which are Makati and Quezon City. We have to find the computed…

Q: 16. Determine the mean number of books sold in an hour at that local book store. 17. Find the…

A: