The average score of a random sample of 87 senior business majors at a university who took a certain standardized test follows a normal distribution with a standard deviation of 28. Use Excel to determine a 90% confidence interval for the mean of the population. Round your answers to two decimal places and use ascending order. Score

Q: 42% of elderly people have high blood pressure. If a sample of 200 is taken and a success is…

A:

Q: The accompanying data represent the pulse rates (beats per minute) of nine students. Treat the nine…

A: The standard normal variable Z is defined as, Z = (X – µ)/σ, where µ is the mean of the random…

Q: Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 69…

A: Solution:The empirical rule for any normal distribution is given below.68% of the observations fall…

Q: A drug was tested on one hundred and fifty patients of which thirty patients respond to the…

A: Given information: A drug was tested on 150 patients. Among 150 patients, 30 patients are responded…

Q: A random sample of 45 cars in the drive-thru of a popular fast food restaurant revealed an average…

A: given that,population standard deviation, σ =4.89sample mean, x =17.79size (n)=45

Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…

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Q: Use the sample mean(78.5)and sample standard deviation (12.3671)in your calculations below. Use…

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Q: The weight of laboratory mice follows a normal distribution, with a mean of 0.68 ounce and a…

A: Answer  Mean =0.68 Standard deviation =0.02

Q: Using the formulas, calculate the (i) mean and (ii) standard deviation of X.

A: Let p be the probability of shot that scored points. Given that p = 61.3% = 0.613 Given that X= the…

Q: A sample of the number of sick days used by employees at a clinic is as indicated: 0,    0,    1,…

A: Given data 0,0,1,1,2,4

Q: A car salesperson offers you a car at the price of $22,895. You look up the mean sales price for…

A: We have given that the random variable X that is sales price. Here, X = 22895 Mean = 21900 and…

Q: Salespeople for a solar technology company have average annual sales of $400,000, with a standard…

A:

Q: Identify the population(s). Average number of Americans who consume alcohol. All individuals who…

A: Parameter: Parameter may be defined as which one is based on population

Q: om's commuting time from his residence in Carmel to the IUPUI campus has a normal distribution.  The…

A: Given that  The residence in Carmel to the IUPUI campus has a normal distribution.  Standard…

Q: The accompanying data represent the pulse rates (beats per minute) of nine students. Treat the nine…

A: Given, Student Pulse 1 76 2 60 3 60 4 80 5 73 6 80 7 80 8 68 9 73

Q: At a tennis tournament a statistician keeps track of every serve.  The statistician reported that…

A: GivenMean(μ)=100standard deviation(σ)=9

Q: A random sample of 42 cars in the drive-thru of a popular fast food restaurant revealed an average…

A:

Q: A researcher is interested in the idea of a Protestant work ethic. She conducts a random survey on…

A: The sample size, sample mean and sample standard deviations are:Sample sizesample standard…

Q: The data {9, 5, 5, 9, 2} represent a random sample of the number of days absent from school for five…

A:

Q: Allegiant Airlines charges a mean base fare of $89. In addition, the airline charges for making a…

A: Given that: Mean base fare = $89 Additional Charges = $35 Sample size,  n = 50 Population standard…

Q: The average travel time to work for a person living in Kokoma, Indiana, is 17  minutes.  Suppose the…

A: Solution: Let X be the average travel time to work for a person living in Kokoma  Indiana has normal…

Q: A personnel director in a particular state claims that the mean annual income is the same in one of…

A: Hypothesis testing is a tool for making statistical inferences about the population data. It is an…

Q: A survey of 21 accountants finds that they spend a mean of $45.00 each week on lunch with a standard…

A: The provided data is,

Q: The City UHIver Departmer Math 150 Mid ny 5 questions. If you be evaluated, but on y equal weight.…

A:

Q: e z scores to compare the given values. recent awards ceremony, the age of the win the standard…

A: Actor=X , Actress=Y X=35  ,  Mean=47.6 , Standard deviation=6.7 Y=48  , Mean=35.6 , Standard…

Q: Two hundred pre-engineering students have their midterm grades in the statistics, assuming normally…

A: Given data: μ=2.2σ=0.6Normal distributionN=200n(2<x<2.5)=?

Q: which in the picture is an estimator for the population mean µ?

A:

Q: In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores…

A: According to Empirical rule (68-95-99.7 rule) Given that the middle 68% of the scores fall…

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Q: Identify the​ t-statistic and P-value.

A: The sample size n is 23.

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A: It is given that the mean is 312 and standard deviation is 125.

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Q: Identify the type of data that would be used to describe a response. Number of Mt. SAC students…

A: Qualitative variables/Categorical variables:   The variable that describes about the characteristic…

Q: 2. The average credit card debt per household in 2001 was $8637 with a standard deviation of $2400.…

A: population mean = $8637Population standard deviation = 2400Sample size (n)= 225

Q: The SAT Math scores have a bell-shaped distribution with a Mean of 567 and a Standard Deviation of…

A: We have given that,  Let the SAT scores are normally distributed with mean (mu) = 567 and standard…

Q: Salaries for teachers in a particular elementary school district are normally distributed with a…

A: Given information- Population mean, µ = $45,000 Population standard deviation, σ = $6,200 Sample…

Q: A concierge is interested in how long it takes to bring passengers to the airport and then return to…

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Q: The average income of a graduate from the University of Eastern West Virginia is $50,000 per year,…

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Q: Find the standard deviation of the following values: 2.58x10-5, 2.33x10-5, 3.28x10-5, 3.57x10-5

A:

Q: Students in the psychology department at General State University consumes an average of 7 sodas per…

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Q: A student randomly selects 10 paperbacks at a store. The sample standard deviation is $1.50.…

A: Solution To find confidence interval we will use chi square distribution.

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults doors, and those…

A: Here we need to find the indicated iq score.

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.