A normal distribution has a mean of 142 and a standard deviation of 16. What is the probability that a randomly selected value lies between 142 and 174?

A normal distribution has a mean of 142 and a standard deviation of 16. What is the probability that a randomly selected value lies between 142 and 174?

An investment portfolio has an annualized return of 8.84% with a standard deviation of 14.24% Calculated over a 20 year period. What is the expected return with one, two and three standard deviations...

Looking for the range of outcomes. I believe they are as follows. 1 SD = -3% to +23% 2 SD = -16% to +46% 3 Sd = -39% to + 59% Is...

Use the frequency distribution table below showing a sample data set for 10 students on a test with a maximum score of 12 to find the mean score. Score Frequency 1...

A report claims that the returns for the investment portfolios with a single stock have a standard deviation of 0.4848?, while the returns for portfolios with 3131 stocks have a standard deviation...

Hi i have found out the following Weight in Kingsley Weight in Duvall ER SD 0.0% 100.0% 15.00 25.00 25.0% ...

Consider the following binomial experiment: A study in a certain community showed that 9% of the people suffer from insomnia.

Assuming you are rolling a pair of fair six-sided dice so that your random variable X is the sum of the two up faces. Recall that the population mean and standard deviation are: μX=7, σX= 1.707825 If...

Nationwide it has been shown that the average height of American adult men is approximately 69.7 inches and a standard deviation of 2.7 inches. Assuming that the heights are normally distributed and...

Suppose that the scores on particular FDMAT 108 unit exam at BYU-Idaho were approximately normally distributed with a mean of 74 and a standard deviation of 8. 7. About what percentage...

A) What is the chance of obtaining a birth weight of 141 oz or heavier when sampling birth records at random? B) What is the chance of obtaining a birth weight of 120 or lighter?

The mean clotting time of blood is 7.45 seconds with a standard deviation of 3.6 seconds. What is the probability that an? individual's clotting time will be less than 6 seconds or greater than 9...

Laboratory experiment shows that the life of the average butterfly is normally distributed with a mean of 18.8 days and a standard deviation of 2 days.

The question: The ages, x years, of 150 cars are summarised by ∑x = 645 and ∑x2 = 8287.5 Find ∑(x-y)2 where y denotes the mean of x. The...

set of data with 1200 numbers is normally distributedwith a mean of 27 and a standard deviation of 4. how many numbers in the data would you expect to be between 23 and 31?

Assume the population mean is µ=12 and standard deviation 2. By Central Limit Theorem the random sample of 121 measurements from this population would have what kind of distribution?

Readings on a thermometer are normally distributed with a mean of 0C° and a standard deviation of 1.00. What is the probability that a randomly selected thermometer reads: a...

Previously, an organization reported that teenagers spent 4.5 hours per week, on average, on the phone. The organization thinks that, currently, the mean is higher. Fifteen randomly chosen teenagers...

The depot is using a standard of 650 hours for a particular modification effort. You are to review the standard and determine whether it should be revised. After sampling 20 of these modifications...

Use the following data: 11, 14, 15, 19, 10. What's the standard deviation?

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