If a set of observations is normally distributed, what percent of these differ from the mean by (a) more than 2.50? (b) less than 0.640?

Q: If IQ scores are normally distributed with a mean of 100 and standard deviation of 12, what does…

A: The normal distribution is symmetric in nature having parameters μ and σ.The mean, mode, and median…

Q: A study found the lengths of daily driving time for people in your district are Normally distributed…

A: The mean is 35 minutes and the standard deviation is 3.

Q: Suppose the life span of a brand of lightbulbs is normally distributed with a mean of 2000 hours and…

A: It is given that  Mean, μ = 2000 Standard deviation, σ = 320 Z-Score, Z = ( X - μ )/σ

Q: A normally distributed data set has a mean of 0 and a standard deviation of 2. What is the percent…

A: Introduction: The fashionable regular distribution, additionally called the z-distribution, is a…

Q: What is likely true about the distribution of YouTube views to have such different results when…

A: A careful inspection of the table reveal that the percentile value increases for each percentile.…

Q: A normally distributed set of data has been generated where 50% of the data lies below 97 and 70%…

A:

Q: if a distribution is normal with a population mean = 60 and population standard deviation = 15, what…

A: Let "X" be the scores that is normally distributed.

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

A:

Q: If you chose to compute a mean for a variable, which measure of variability would you most likely…

A:

Q: For woman at Hartford college, times to run 400 meters are normally distributed with a mean of 85…

A: Solution: Let X be the time to run 400 meters. From the given information, X follows normal…

Q: What is the area of proportion below a z-score of -.91? What is the area of proportion between the…

A: Z scores are given.

Q: calculate that the mean age of students, where 30 is the mean and standard deviation is 6. Between…

A:

Q: It is possible to have a standard deviation of -1 for some data set? True or False

A: See the below solution

Q: Using the simplified version of the normal distribution, what percentage of the cases falls within 2…

A: It is given, A normal distribution with 2 standard deviation.

Q: What is the area of proportion between the mean and a z-score of -2.88? What is the area of…

A: The area of proportion between the mean and a z-score of –2.88 = P(–2.88 < Z <0) = P(Z<0) –…

Q: What percent of cases ARE NOT between the mean and 0.21 standard deviations above the mean?

A:

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 71…

A:

Q: What is likely true about the distribution of YouTube views to have such different results when…

A: A careful inspection of the table reveal that the percentile value increases for each percentile.…

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: When a distribution is bell-shaped, approximately what percentage of data values fall within 1…

A: We know that, the empirical rule which is also known as 68-95-99.7 rule.  The Empirical Rule finds…

Q: Find the mean absolute deviation of the data below 10,15,9,8,7,11,14,8,10,12

A:

Q: Suppose that the score on a reading test are normally distributed within a mean of 70 and a standard…

A:

Q: Why would you use mean absolute deviation as opposed to the mean average?

A: Mean = average of all data points .

Q: In a normal distribution, what percentage of scores falls below and score of -2.33

A:

Q: Does data have to always be numerical in statistics?

A: Does data have to always be numerical in statistics

Q: for normal distribution mean is 50 liter per hour and standard deviation is 10 liter per hours .…

A: We have to find correct answer..

Q: Suppose that the distance of fly balls hit to the outfield is normally distributed with a mean of…

A: Let X denote the distance of fly balls hit to the outfield is normally distributed with a mean of…

Q: What proportion of the distribution of sample means is between a z  of 1.34 and z of -1.00?

A: P(1.34<z<-1.00)=?

Q: Suppose that time required to compete a 1040R tax form is normally distributed with a mean of 110…

A: We have to find probability...