A computer scientist estimates that the proportion of users that properly back up their data is p = 0.304. They will randomly select n = 380 users and will compute the sample proportion that properly back up their data. What is the mean of the distribution of the sample proportion? What is the standard deviation of the distribution of sample proportion? (Report answer accurate to 3 decimal places.)

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A: Note: According to Bartleby, expert solve only one question and rest can be reposted.

Q: Imagine that scores for national aptitude exam have a normal distribution with a mean of 700 a…

A: Given: Mean = 700 Standard deviation = 30 Let X ~ N(700, 302)

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Q: An analysis of a data set (N = 16) has revealed that its standard deviation (SD) of 2. Then, what is…

A: GivenN=16standard deviation(SD)=2

Q: Show that the standard deviation of z-scores equals 1

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Q: A normally distributed variable has a mean of 75 and a standard deviation of 2. What is the z-score…

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Q: The standard deviation of the certain distribution is 9, what is its variance?

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…

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A: Let us understand better by assuming X1, X2, ...., Xn be n data points. Then,…

Q: In a population with a mean of µ = 30 and a standard deviation of σ = 5, a score of X = 18 would be…

A: Given that  μ=30 , σ=5 , X=18

Q: What is the Z score of an individual with a height of 183cm if the mean of the population is 170cm…

A: Given that mean = 170 SD = 6.1 And the height of individual X = 183

Q: A sample of n = 5 scores has ΣX = 20 and ΣX2 = 180. For this sample, what is the value of the sample…

A: According to the provided information,   n = 5  ΣX = 20 ΣX2 = 180

Q: A statistics professor announces that 15% of the grades he gives are As. The results of the final…

A: It is given that the mean and standard deviation are 83 and 6, respectively.

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Q: A study of the Physics and Astronomy department has found that 95% of the graduate students drink…

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A: Here  Standard deviation of sample mean = σn

Q: Suppose a random sample of 25 measurements was taken from a population with a mean of 74 and a…

A: We know that,  Sample size (n) = 25 and population mean (μ) = 74 and population standard deviation…

Q: For a random sample of 9 women, the average resting pulse rate is x-bar = 76 beats per minute, and…

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Q: A medical statistician wants to estimate the average weight loss of people who are on a new diet…

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Q: A livestock company reports that the mean weight of a group of young steers is 1150 pounds with a…

A: μ=1150σ=87  =P1050<x<1250

Q: For a random sample of 9 women, the average resting pulse rate is x̅ = 76 beats per minute, and the…

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Q: If the standard deviation of all dogs is 54 lbs, what is the standard deviation of the average…

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Q: In a particular city, the weight of newly born babies is normally distributed with a standard…

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Q: A livestock company reports that the mean weight of a group of young steers is 1180 pounds with a…

A: GivenMean(μ)=1180standard deviation(σ)=90

Q: Alex wants to find out: if the standard deviation of the mean for the sampling distribution of…

A: Solution: given standard deviations of sample s1=9. fir sample size n1=256  Then what will be the…

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A:

Q: A medical statistician wants to estimate the average weight loss of people who are on a new diet…

A: Given Data: ME=4/2=2 σ=8   z-value corresponding to 97% of CI=2.17

Q: A desktop PC uses 120 watts of electricity per hour based on 4 hours of use per day. Assume the…

A: Given that mu = 120 , s.d = 6,n=500 p(x<106 ) =?  approximately how many will use less than 106…

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Q: In general, the standard error of the sampling distribution is __________the standard deviation from…

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Q: A recent report indicates that 2-year-old children from the well-educated suburban families watched…

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Q: An analyst found that the average amount of money in bank accounts at his/her bank is $2,000 with a…

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Q: What proportion of 2-year-old children watch more than90 minutes of television each day? What…

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Q: Assume the annual day care cost per child is normally distributed with a mean of ​$6000 and a…

A: The detailed solution is as follows below:

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Q: A recent newspaper article reported the results of a survey of well-educated suburban parents. The…

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Q: The proportion of all high school students who watch national news is p = 0.57. A random sample of…

A: Solution: Given information: n= 60 Sample size  p = 0.57 Population proportion

Q: If the standard deviation of a sample is 4.3 for 28 data values, what would the standard deviation…

A:

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.