A researcher is examining the gradate student lifestyle at UNCG, and wants to find out how many hours each week the average graduate student spends on class reading and homework. She obtains a list of every graduate student currently enrolled in coursework at UNCG and takes a simple random sample of 144 graduate students and find that the average student in her sample spends 17 hours a week on class reading and homework, with a standard deviation of 3 hours. She wants to use this information to infer how much time the entire population of graduate students on homework each week.   a. What is the standard error for the sampling distribution of time spent on homework? b. What is the 95% confidence interval for time spent on homework?

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A: GivenMean(μ)=180standard deviation(σ)=20

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A: Population average(μ) = 93 sample size (n) = 50  sample average(x)=89.5 standard deviation(s)…

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A: Given Data Population Mean,μ = 45.0 Population Standard Deviation,σ = 15.0

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A: Empirical reules:1)68% of observations falls within the first standard deviation (µ ± σ)2)95% within…

Q: In a mid-size company, the distribution of the number of phone calls answered each day by each of…

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A: Normal Distribution: Normal Distribution is the bell-shaped symmetric distribution of continuous…

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A: At a customer service call center for a large company, the number of calls received per hour is…

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A: Let X be the random variable from normal distribution with mean (μ) = $180 and standard deviation…

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Q: ) H0: ?1 − ?2 = 0 Ha: ?1 − ?2 > 0     t=_________ P-value_______   State the conclusion in the…

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A: It was stated that the mass of a standard loaf of white bread is, by law meant to be 700g with a…

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A: Let X be number of calls received per hour. Given: μ=190,  and σ=20 We need to find the PX<163

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A: It is given that:

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A: Given information: The distribution of the number of phone calls answered each day is bell-shaped…

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A:

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A: Null hypothesis:   H0: µ≤150,000   Alternative hypothesis:   Ha:µ>150,000.

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A: Given Population standard deviations σ=114, sample size n=19, sample standard deviations s=143…

Q: Suppose population 1 is all blue cars sold at used car auctions, and the mean sale price of all such…

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Q: In a mid-size company, the distribution of the number of phone calls answered each day by each of…

A:

Q: A district councilor informs the prospective developer of a shopping centre that the average monthly…

A: Solution: Given information: n= 25 Sample size x = 2400 Sample mean μ= 2500 Population mean σ= 200…

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A: From the given information, H0: The mean is at least 6 hours. H1: The mean is less than 6 hours.…

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A: Given : μ = 14 σ = 2 P(12≤X≤15) = P(X≤15) - P(X≤12)  P(12≤X≤15) = PX-μσ≤15-μσ - PX-μσ≤12-μσ…

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A: It is given that the sample mean of n=64 breads is 695g that is x¯=695 Assuming that X to be the…

Q: Determine the null and alternative hypotheses. *Determine the appropriate critical value. Select…

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Q: At a certain beer bottling plant, the amount of beer that is put in a bottle is known to be…

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Q: An auto manufacturer claims that its new 4-cylinder Hybrid auto with manual shift averages 50 mpg…

A: Computation of test statistic value: The population standard deviation is unknown. Thus, in order to…

Q: For drivers in the 20-24 age bracket, there is a 34% rate of car accidents in one year (based on…

A: Solution: 1. Let X be the number of car accidents in one year and n be the sample number of people…

Q: A candy company claims that 18​%of its plain candies are​ orange, and a sample of 200 such candies…

A: Given: n = 200 and p=0.18 Consider, X be the random variable that represents the number of orange…

Q: In one region, the September energy consumption levels for single-family homes are found to be…

A: we have to use z table to solve.

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.