Find the X values.

cistG
2021-01-31
Answered

For a population with a mean of $\mu =100$ and a standard deviation of $\sigma =20$ ,

Find the X values.

$z=-.50$ .

Find the X values.

You can still ask an expert for help

asked 2021-02-21

We wish to estimate what percent of adult residents in a certain county are parents. Out of 600 adult residents sampled, 192 had kids. Based on this, plot a

Express your answer in the form of three inequalities. Give your answers in decimal fractions up to three places

asked 2021-03-18

A population of values has a normal distribution with

Find the probability that a single randomly selected value is between 133.6 and 134.1.

Write your answers as numbers accurate to 4 decimal places.

asked 2021-10-25

Random variable X and Y have the joint PDF

Find the marginal PDF

asked 2021-08-16

Suppose that the height, in inches, of a 25-year-old man is a normal random variable with parameters mu=71 and sigma^2=6.25 . What percentage of 25-year-old men are over 6 feet, 2 inches tall? What percentage of men in the 6-footer club are over 6 feet, 5 inches?

asked 2021-01-05

If X and Y are random variables and c is any constant, show that $E(X-Y)=E(X)-E(Y)$ .

asked 2021-10-19

Suppose that $X}_{1},{X}_{2}{\textstyle \phantom{\rule{1em}{0ex}}}\text{and}{\textstyle \phantom{\rule{1em}{0ex}}}{X}_{3$ are three independent random variables with the same distribution as X.

What is the ecpected value of the sum$X}_{1}+{X}_{2}+{X}_{3$ ? The product $X}_{1}{X}_{2}{X}_{3$ ?

Suppose a discrete random variable X assumes the value$\frac{3}{2}$ with probability 0.5 and assumes the value $\frac{1}{2}$ with probability 0.5.

What is the ecpected value of the sum

Suppose a discrete random variable X assumes the value

asked 2020-11-01

Round each z-score to the nearest hundredth.

A data set has a mean of

$x=6.8$

and a standard deviation of 2.5. Find the z-score.

$x=9.0$

A data set has a mean of

and a standard deviation of 2.5. Find the z-score.