1. The random variable X takes on the values 5, 20, 30, and 200 with probabilites...
1. The random variable X takes on the values 5, 20, 30,
and 200 with probabilites 0.60, 0.30, 0.08, and 0.02
respectively.
Use the statistical capacity of your calculator to find the
expected value of X rounded to one place of decimal. The
same data will be
used in question 2, so don't clear your calculator just yet.
2. Using the same data as in Question 1, find the VARIANCE of the random variable X rounded to two places of decimal.
I know how to manually do the calculations, I want to know how to do the calculators with a CASIO-991ES PLUS C calculator.
The answer for question 1 is 15.4, and the answer for question 2 is 769.83.
Homework Answers
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1. The random variable X takes on the values 5, 20, 30,
and 200 with probabilites...
The random variable X takes the values -2, -1 and 3 according to the following probability...
The random variable X takes the values -2, -1 and 3 according to the following probability distribution: -2 3k -1 2k 3 3k px(x) i. Explain why k = 0.125 and write down the probability distribution of X. ii. Find E(X), the expected value of X. iii. Find Var(X), the variance of X.
A random variable X has a normal random varia ble with mean of 20 and standard deviation of 2 (a) Find the two values o...
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The random variable X takes the values -2, -1 and 3 according to the following probability distribution: -2 3k -1 2k 3 3k px(x) i. Explain why k = 0.125 and write down the probability distribution of X. ii. Find E(X), the expected value of X. iii. Find Var(X), the variance of X.
A random variable X has a normal random varia ble with mean of 20 and standard deviation of 2 (a) Find the two values of X that separates the middle 50% of data (or area) of the distribution of X. Keep at least 2 decimal places (b) Compute the probability that the variable is at most 15. Keep at least 4 decimal places (c) Compute the probability that the variable is less than 12 or more than 21 Keep at...
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