15 Answered Questions for the topic Standard Normal Distribution

02/20/21

#### How do I construct 95% confidence intervals for this question?

An article regarding interracial dating and marriage recently appeared in a newspaper. Of the 1704 randomly selected adults, 307 identified themselves as Latinos, 322 identified themselves as...
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12/01/19

#### Baby weights: According to a recent National Health Statistics Reports, the weight of male babies less than 2 months old in the United States...

Baby weights: According to a recent National Health Statistics Reports, the weight of male babies less than 2 months old in the United States is normally distributed with mean 11.5 pounds and...
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08/27/19

#### Probability of several consecutive drawn random samples of a standard normal distribution exceeding certain value.

Hi,I have trouble figuring out the following:I have a standard normal distribution (µ = 0, σ² = 1) and now, as an example, draw 3 random independent samples.What is the chance, that the sum of...
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07/01/18

#### Standard Normal Probability ANSWER CHECK

A group of retailers models that the amount of dollars X that an individual will spend in christmasshopping has a normal distribution with mean μ = $1100 and standard deviation σ = $330....
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01/23/18

#### For the standard normal distribution, find the area within one standard deviation

For the standard normal distribution, find the area within one standard deviation of the mean that is, the area between μ − σ and μ + σ. Round to four decimal places.
Show complete steps.

Standard Normal Distribution

12/06/17

#### According to a national poll of 650 college students, 57% play video games more than 6 hours a week. Find the margin of error and the 95% confidence interval fo

According to a national poll of 650 college students, 57% play video games more than 6 hours a week.Find the margin of error and the 95% confidence interval for the survey. Give your answers as...
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12/15/16

#### The mean of normal probability distribution is 200 pounds the standard deviation is 5 pounds what is the area between 215 pounds and the mean of 200 pounds

What is the area between 214 pounds and the mean of 200 pounds

Standard Normal Distribution Probability

08/29/16

#### Suppose the variable x is represented by a standard normal distribution.

What value of x is at the 70th percentile of the distribution? Equivalently, what is the value for which there is a probability of 0.70 that x will be less than that value?

Standard Normal Distribution

04/18/16

#### Can someone please help me

For a standard normal distribution, what’s the probability of getting a number less than zero? 75% 63% 50% 43%
34%
Can someone please help me. I am not sure how I am supposed to figure this...
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Standard Normal Distribution Confidence

04/14/16

#### did i understand this question properly and answer it correctly?

An article regarding interracial dating and marriage recently appeared in the Washington Post. Of the 1,709 randomly selected adults, 315 identified themselves as Latinos, 323 identified themselves...
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04/14/16

#### did I solve this right?

In a recent sample of 84 used car sales costs, the sample mean was $6,425 with a standard deviation of $3,156. Assume the underlying distribution is approximately normal.
i. Construct a 95%...
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02/21/16

#### A normally distributed data has been

A normally distributed set of data has been generated where 50% of the data lies below 97 and 70% lies below 104. Determine the mean and standard deviation of this data.

Standard Normal Distribution

06/14/15

#### Statistic Question

A machine fills bags of candy. Due to slight irregularities in the operation of the machine, not every bag gets exactly the same number of pieces. Assume that the number of pieces per bag is...
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Standard Normal Distribution Standard Normal Model

11/07/13

#### For the standard normal distribution, find the area within one standard deviation of the mean--that is, the area between

For the standard normal distribution, find the area within one standard deviation of the mean--that is, the area between µ - σ and µ + σ.
For the standard normal distribution, find the area...
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