What is the variance of the number of times a 6 appears when a fair die is rolled 10 times?

opatovaL
2021-05-03
Answered

What is the variance of the number of times a 6 appears when a fair die is rolled 10 times?

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liannemdh

Answered 2021-05-04
Author has **106** answers

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asked 2021-08-19

Let X represent the difference between the number of heads and the number of tails obtained when a coin is tossed n times.

What are the possible values of X?

What are the possible values of X?

asked 2021-08-19

Based on the Normal model N(100, 16) describing IQ scores, what percent of peoples

asked 2021-08-20

Let X be a normal random variable with mean 12 and variance 4. Find the value of c such that P{X>c}=.10.

asked 2021-11-12

1.The probability of Christine getting a new job or going on vacation (or both) is 0.85. If the probability of Christine going on vacation is 0.10 and the probability of Christine getting a new job is 0.75, are the events Christine gets a new job and Christine goes on vacation mutually exclusive?

2. The probability that Isabelle will go trick-or-treating is 0.4. The probability that she will go trick-or-treating or watch a scary movie is 0.65. The probability of Isabelle going trick-or-treating and watching a scary movie is 0.20.

A. What is the probability that Isabelle will not watch a scary movie?

B. What is the probability that Isabelle will watch a scary movie but does not go trick-or-treating?

2. The probability that Isabelle will go trick-or-treating is 0.4. The probability that she will go trick-or-treating or watch a scary movie is 0.65. The probability of Isabelle going trick-or-treating and watching a scary movie is 0.20.

A. What is the probability that Isabelle will not watch a scary movie?

B. What is the probability that Isabelle will watch a scary movie but does not go trick-or-treating?

asked 2021-11-13

Probablity and statistics Question

Need URGENT

The probability that an automobile being filled with gasoline will also need an oil change is 0.37; the probability that it needs a new oil filter is 0.45; and the probability that both the oil and filter need changing is 0.20.

(a) If the oil had to be changed, what is the probability that a new oil filter is needed?

(b) If a new oil filter is needed, what is the probability that the oil has to be changed?

Need URGENT

The probability that an automobile being filled with gasoline will also need an oil change is 0.37; the probability that it needs a new oil filter is 0.45; and the probability that both the oil and filter need changing is 0.20.

(a) If the oil had to be changed, what is the probability that a new oil filter is needed?

(b) If a new oil filter is needed, what is the probability that the oil has to be changed?

asked 2021-10-25

The National Vaccine Information Center estimates that 90% of Americans have
had chickenpox by the time they reach adulthood.

Suppose we take a random sample of 100 American adults. Is the use of the binomial distribution appropriate for calculating the probability that exactly 97 out of 100 randomly sampled American adults had chickenpox during childhood? Explain.

Suppose we take a random sample of 100 American adults. Is the use of the binomial distribution appropriate for calculating the probability that exactly 97 out of 100 randomly sampled American adults had chickenpox during childhood? Explain.

asked 2021-05-05

Rolling four fair dice and getting four 6s