Tubes are manufactured in a company that has a mean of life, (hr = 800) and a standard deviation of 10 hours. Find a mechanism for a random sample n = tube 64 if the arithmetic mean lies: more than 810 hours. Less than 780 hours 24

Q: Executives of a supermarket chain are interested in the amount of time that customers spend in the…

A: 1.The given claim is to test, whether the mean μ is less than 38 minutes. So here Ho: μ = 38 VS Ha :…

Q: If the average weight of pigs in PigglyWiggly, Pennsylvania is 221.4 pounds with a standard…

A: Given, If the average weight of pigs in PigglyWiggly, Pennsylvania is 221.4 pounds with a standard…

Q: Do married and unmarried women spend the same amount of time per week using Facebook? A random…

A: We have given that  Sample size n1 = 45 , n2 = 39 Sample mean xbar1= 3.0 , xbar2 = 3.4 Sigma1 = 1.2…

Q: smoke cigarettes is 0.39.

A:

Q: 1- A health researcher read that a (200)pound male can burn an average of (546) calories per hour…

A: In statistical inference, there are two types of sample tests. One is a small sample test and…

Q: Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Solution: Let X be the transport time. From the given information, X has mean µ=28 minutes and a…

Q: Customers at a certain pharmacyspend an average of $54.40, with a standard deviation of $13.50.…

A: It is given that customers at a certain pharmacy spend an average of 54.40, with a standard…

Q: 20% of the students in a class of 400 are planning to go to graduate school. The standard deviation…

A:

Q: 5. Men spend an average of 29 minutes per day on weekends and holidays exercising and playing…

A: Critical Values are the cut-off values that provide with the regions in which the test statistic is…

Q: If the power of the test performed against the alternative is 0.812, what the Probability of…

A: It is given that Power of test = 0.812

Q: A house cleaning service claims that it can clean a four-bedroom house in average 2 hours. You want…

A: From the provided information, Sample size (n) = 81 Sample mean (x̅) = 1.95 Standard deviation (s) =…

Q: A scientist has read that the mean birth weight, μ, of babies born at full term is 7.3 pounds. The…

A: Given that a scientist has read that the mean birth weight, μ, of babies born at full term is 7.3…

Q: A marketing consultant is hired by a major restaurant chain wishing to investigate the preferences…

A: In this case, it is known that the P-value is 0.002 and the significance level α=0.05. Decision rule…

Q: A psychologist finds that the intelligence quotients (IQ) of a group of patients are normally…

A: A psychologist finds that the intelligence quotients (IQ) of a group of patients are normally…

Q: The following data for a random sample of banks in two cities represent the ATM fees for using…

A:

Q: A. The owner of a computer repair shop has determined that his daily revenue has a mean of $7000 and…

A: Note: Hey there! Thank you for the question. As you have posted multiple questions together, as per…

Q: A survey asks a random sample of 1500 adults in Ireland if they support an increase in the plastic…

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Q: The average "moviegoer" sees 8.5 movies a year. A moviegoer is defined as a person who sees at least…

A: We have given that  Sample size n = 49  Sample mean = 9.3 Population standard deviation = 3.2

Q: A small business ships specialty homemade candies to anywhere in the world. Past records indicate…

A: We have to calculate :- a.  the null and alternative hypotheses to test this claim. b. What is the…

Q: Given a normal population whose mean is 50 and whose standard deviation is 5. Find the probability…

A: Let X be the random variable. It is given that X is normally distributed with mean 50 and standard…

Q: If the average weight of pigs in PigglyWiggly, Pennsylvania is 221.4 pounds with a standard…

A:

Q: A researcher is conducting a study to determine the mean trough dosage of medication for a…

A: Given, Population standard deviation (σ) = 40 mg Margin of error (E) = 10 mg Confidence level = 95%

Q: Five hundred children participated in a field demonstration. Their heights averaged 110cm with a…

A:

Q: At a small local college, 78% of all students are receiving some kind of financial aid. A local…

A: The formula of the standard deviation of the sampling distribution is,

Q: Most exhibition shows open in the morning and close in the late evening. A study of Saturday arrival…

A: From the provided information, Mean (µ) = 2 hours and 2 minutes or 122 minutes Standard deviation…

Q: Sleep Time A person read that the average number of hours an adult sleeps on Friday night to…

A: Solution: Given information: n= 15 Sample size  μ= 7.2 hours  Population mean x=8.3 hours  Sample…

Q: A researcher is conducting a study to determine the mean trough dosage of medication for a…

A: The formula for sample size is as follows:

Q: A researcher wishes to estimate within $20 the average cost of postage a community college spends in…

A: GivenMargin of error(E)=20standard deviation(σ)=60confidence level = 90%

Q: About 13% of the population has blue eyes. 1700 people are randomly selected. a. Find the mean…

A: It is given that About 13% of the population has blue eyes i.e. probability that a population has…

Q: (a)    It has been reported that the length of human pregnancies from conception to birth…

A: a)GivenMean(μ)=266standard deviation(σ)=16

Q: According to driver safety statistics in a particular area, one percent of drivers reported that…

A: As per our guidelines we are supposed to answer only one question per post so i am solving first…

Q: Boston Marathon: A sports statistician claims that the mean winning times for Boston Marathon…

A:

Q: A pharmaceutical company claims that its new medication results in side effects for 20% of those…

A: n = 100 p = 0.2

Q: Executives of a supermarket chain are interested in the amount of time that customers spend in the…

A: a. Null and Alternative hypotheses: From the given information, the objective is to test whether or…

Q: Suppose that the lengths of human pregnancies are normally distributed with a mean of 267 days and a…

A:

Q: n a television survey questionnaire, 2000 surveys were mailed.  The response rate is normally…

A: Given Information: In a television survey questionnaire, 2000 surveys were mailed.   The response…

Q: A marketing consultant is hired by a major restaurant chain wishing to investigate the preferences…

A: We have given that  Sample size n =25  Sample mean =14.50 Standard deviation =3.50

Q: The batteries from a certain manufacturer have a mean lifetime of 820 hours, with a standard…

A: The mean is 820 hours and the standard deviation is 70 hours.

Q: Credit Card Debt It has been reported that the average credit card debt for college seniors at the…

A: Given problem Given that   Credit Card Debt  It has been reported that the average credit card…

Q: Car Aircon claims that the average cost of car aircon installation and repairs is 11,000. A sample…

A: From provided information, it is claimed that the average cost of car aircon installation and…

Q: he average prison sentence for a person convicted of second-degree murder is 16 years. If the…

A: Given data,μ=16σ=2.1P(X>19)=?

Q: On average, accountants earn approximately an average of $6500 per year in the United States. Assume…

A:

Q: A researcher believes that the mean age of medical doctors in a large hospital system is older than…

A: Given data ,μ=46x=48.6σ=4.2n=30∝=0.5

Q: The (DOH) in Davao City wants to identify the average number of COVID patients admitted in a certain…

A: Given that Sample size =n=41

Q: A marketing consultant is hired by a major restaurant chain wishing to investigate the preferences…

A: In the given scenario the hypothesis test was done to determine if we have sufficient evidence to…

Q: A local hospital doctor's team reports that the average cost of treatment of heart disease is 800…

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Q: "An electrical firm manufactures light bulbs that have a length of life that is approximately…

A: Given data,Mean μ=843sd    σ=35n=31Find mean of sampling distribution?

Q: What is the standard deviation of 5 randomly selected years for the first 8 months? A. 0.9720 B.…

A: Hello. Since your question has multiple parts, we will solve first 3sub parts question for you. If…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.