According to Quantcast analytics of CrossFit.com, 59% of CrossFitters have children. Suppose we take a random sample of 40 Crossfitters and find the sample proportion (ˆp) that have children. We repeat this process many times. (a) What do you expect the mean of the ˆp’s to be? (b) What do you expect the standard deviation of the ˆp’s to be? (c) What do you expect the shape of the ˆp’s to be?

Q: What would be a potentially better alternative to using standard error and standard deviation as the…

A: Standard Deviation : The standard deviation(SD) measures the amount of variability, or dispersion…

Q: Metabolic rate is the rate at which someone consumes energy. Data (calories per 24 hours) from 7…

A: n=7 Data: 1792,1666,1362,1614,1460,1867,1439

Q: Can you please explain the difference between the standard deviation and standard error of x and p,…

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Q: It seems these days that college graduates who are employed full-time work more than 40 -hour weeks.…

A: From the provided information, Population mean (µ) = 40 hours Sample size (n) = 19 Sample mean (x̅)…

Q: What does having a higher standard deviation means?

A:

Q: What do the mean deviation, variance and standard deviation all have in common? How is this common…

A: Mean deviation, standard deviation and variance all measure the spread of the distribution.Mean…

Q: Suppose​ 18% of​ movie-goers say that horror is their favorite movie genre. If a random sample of…

A: Obtain the mean number of movie-goers that prefer horror movie genre. The mean number of movie-goers…

Q: Suppose you have a test with a mean of 66 and a standard deviation of 5. If you first increase…

A: Given Mean =66 Standard deviation=5

Q: An IQ test has a mean of 97 and standard deviation of 10. Which is more unusual, an IQ of 87 or an…

A: Given data  μ = 97σ = 10which score is more unusual? 87 or 110?

Q: How do I interpret the 6 charcteristics of data when I am only given the mean, median, mode, and…

A: According to the provided information, mean, median, mode, and standard deviation are given.

Q: It seems these days that college graduates who are employed full-time work more than 40 -hour…

A: Given information- Population mean, μ = 40 Sample size, n = 19 Sample mean, x-bar = 44 Sample…

Q: Alcohol is claimed to be a factor in 39% of all fatal car accidents in the United States. The town…

A: The sample recored needs to show alcohol as a factor to suggest a significant difference exists…

Q: The results of a common standardized test used in psychology research is designed so that the…

A: Consider X be a random variable which follows normal distribution indicating the score earned on a…

Q: The results of a common standardized test used in psychology research is designed so that the…

A: The standard normal value helps to understand the number of deviation of observations from the mean.…

Q: Which of these statements is best?       The variable to be predicted is the independent variable.…

A: Which of these statements is best?       The variable to be predicted is the…

Q: ou find the standard deviation in the most easiest way?

A: The standard deviation is used to calculate the variability of the data set. It tells us about the…

Q: Physics students at a local university have designed a "hot dog gun" designed to shoot hot dogs into…

A: Let X: the distance it will shoot hot dogs. X is normally distributed.i.e. X~N(μ,σ2)where,…

Q: Ex 2\\ Calculate the Variance and Standard deviation for the following data X= 15, 10, 8, 4, 23, 25,…

A: We have to find standard deviation and variance of given data. Formulae required:  Variance=∑…

Q: The following table lists the income tax rates for a single person earning $50,000 per year for…

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Q: seems these days that college graduates who are employed full-time work more than  40 -hour weeks.…

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Q: It seems these days that college graduates who are employed full-time work more than 40-hour weeks.…

A: Given data is appropriate for testing of hypothesis to test t-test for single mean. because it is a…

Q: ominic would want to estimate the mean of a population which is normally distributed. The standard…

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Q: Suppose you compared 2 independent samples. The first sample contained 10 people, had a mean score…

A: Given that,mean(x)=37.6standard deviation , s.d1=1.5number(n1)=10mean(y)=34.2standard deviation,…

Q: It seems these days that college graduates who are employed full-time work more than 40-hour weeks.…

A: We have to test claim.

Q: The standard error of an estimator is the standard deviation of the estimator. True False

A: The Standard Error of the estimator is the Standard deviation of the estimator.

Q: Q3 :- :- if you know the standard deviation = 3 for measured data, what is the variance ?

A: Given in question  Standard deviation = 3

Q: You have a data set with mean = 40 and standard deviation = 3. What can you say about the percentage…

A: Given  μ=mean=40, sd=σ=3 P(32<X<40)= ?  Note: this probability value calculated from standard…

Q: It seems these days that college graduates who are employed full-time work more than 40-hour weeks.…

A: The independent variable is respondents. The dependent variable is the number of hours worked per…

Q: How I can calculate the standard deviations of each of the two differentassets?

A: Standard deviation is the positive square root of the mean of the squares of the deviations of the…

Q: ou are a teacher at a gifted school, and you feel that the newest class of students is even brighter…

A: From the provided information, Population mean (µ) = 127 Sample size (n) = 32 Sample mean (x̅) = 134…

Q: The results of a common standardized test used in psychology research is designed so that the…

A:

Q: According to the U.S. Census, the average adult woman is the United States is 65 inches tall and the…

A: Given X is normal Distributed with mean µ = 65.0 and standard deviation σ = 3.0 Need to find Z score…

Q: claims that Chip Ahoy Cookies have an x ̅=28.67 per cookie with a SD=2.67. Assuming this information…

A: Given data,Mean x=28.67sd    =2.67  what is the population parameter for the standard deviation?