A state has a lottery game where a person picks one of the 1000? three-digit numbers between 000 and 999. The lottery selects a? three-digit number at random. With a bet of? $1, a person wins $500...

A state has a lottery game where a person picks one of the 1000? three-digit numbers between 000 and 999. The lottery selects a? three-digit number at random. With a bet of? $1, a person wins $500...

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...

please help

The test scores on the quantitative portion of the Scholastic Aptitude Test (SAT) are normally distributed with a mean score of 570 and SD of 70. Using the empirical rule, approximately what percent...

An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an estimate at the 80% level of confidence. For a sample of 448 third graders,...

a statistics professor plans classes so carefully that the lengths of her classes are uniformly between 47.0 and 57.0. Find the probability that a given class period runs between 50.25 and 51.0 m...

What units would you expect to see if you were calculating the sample STANDARD DEVIATION of sales from a convenient store?

he amount of money that a student at harvard university carries on his/her person is normally distributed with a mean of $25 and a standard deviation of $5. What is the probability that a randomly...

in a standard normal distribution find the area under the cure for z -scores less than -1.23 round to the 4 decimal places?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 X1 6 2 5 3 2 5...

A bank manager decides to study waiting times of customers for teller service at the noon lunch hour (noon to 1pm). He selects one customer every 20 minutes to measure the time the customer enters...

You are preparing some sweet potato pie for your annual Thanksgiving feast. The store sells sweet potatoes in packages of 6. From prior experience you have found that the package will contain 0 spoiled...

Suppose 40% of the restaurants in a certain part of a town are in violation of the health code. A health inspector randomly selects seven of the restaurants for inspection.

A nonnegative integer-valued random variable X has a CDF of the form F(x)=1-(1/5)^x for x=1,2,.....and zero otherwise. Find P(X is odd)? could you please help me with that?

A bus starts with five people and makes 10 stops . assume that passengers are equally likely to get off at any stop. A)describe the sample space and calculate the number of different outcomes...

Suppose a lie detector test has the following properties.If the suspect is telling the truth,the lie detector will correct say so with probability 0.85.if the suspect is lying ,it will correctly identify...

A lot consists of 15 articles of which 8 are free of defects ,4 have minor defects and 3 have major defects.Five articles are selected at random without replacement find probability that at most one...

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?

I'm learning statistics all over again. I need to see how to find the area under the curve using z tables.

For a variable that interest you, discuss why there is variance in scores on that variable.

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