Compute for the mean and standard deviation

Q: The standard deviation of the mean is less than the sample standard deviation because it estimates…

A: Given that True or False  The standard deviation of the mean is less than the sample standard…

Q: The class mean for the exam was 82 with a standard deviation of 6.  There are 37 students in the…

A: We have given that, Mean = 82 , standard deviation σ = 6  sample size n = 37   Standard error of the…

Q: What percentage of the data will fall between 1 standard deviation below the mean and 2 standard…

A: P(-1<z<2)=?

Q: The weight of a type of dog follows Normal distribution with mean of 10 pounds and standard…

A: It is given that the mean and standard deviation are 10 and 2.

Q: Write down the important properties of the Normal Curve.

A: A normal curve is identified using the values of the mean and standard deviation to show the…

Q: What does having a higher standard deviation means?

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Q: The scores on a standardized test are normally distributed with a mean of 105 and standard deviation…

A:

Q: tandard error of the mean is used in the

A: Given that  Estimated Standard error of the mean  We know that  Standard error of the mean is used…

Q: Why does Mean of the Deviations Not a Useful Measure?

A:

Q: How does the curve change when the standard deviation is the same and the mean changes?

A: The mean is the center of symmetry of a curve or normal density curve.

Q: TRUE OR FALSE: the standard deviation describes the average deviation between the individual scores…

A: The standard deviation is a measure of dispersion. It measures the data on how much they have…

Q: How does one calculate the standard deviation?

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Q: Explain an important difference between the standard deviation and the mean.

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Q: The scores on a standardized test are normally distributed with a mean of 90 and standard deviation…

A: The test score is 0.6 standard deviations above the mean is obtained below: From the given…

Q: The number of hurricanes coming within 250 miles is modeled by Polsson distribution with meanz per…

A: Let X be the time, in years, between hurricanes. The number of hurricanes coming within 250 miles of…

Q: Find z score  Xbar= 20 ,mean= 40 , standard deviation = 10

A: Given that Xbar= 20  mean= 40  standard deviation = 10 We have to find z score:

Q: Derive mean and variance of normal distribution.

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Q: Explain Mean of the Squared Deviations?

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Q: what is the mean and standard deviation of all z distributions?

A: Z is distributed as a standard normal variable.

Q: The scores on a standardized test are normally distributed with a mean of 80 and standard deviation…

A:

Q: Assume that an intelligence test scores are distributed normallt with a mean of 100 and a standard…

A: Standard normal distribution: The standard normal distribution is a special case of normal…

Q: Explain why we need to square the deviations from the mean in our calculation of the standard…

A: 3) The deviation formula is, Deviation=Xi-Mean In the formula Xi is individual scores.

Q: How can i compute the standard deviation

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Q: what is the standard error (usually standard error of the mean)?

A: Standard error: The standard error of the statistic is defined as the standard deviation of its…

Q: need range and standard deviation

A: The given data is, The ascending order of the data is, The no.of observations is, n = 40 The…