A population has a probability distribution as follows.
x P(x)
1 0.2
2 0.5
3 0.3
A sample of 2 is drawn and its mean, top enclose x, calculated. Find the probability top enclose x space equals space 2.5 Round off to three decimal places
A population has a probability distribution as follows. x P(x) 1 0.2 2 0.5 3 0.3...
QUESTION 3 х A population has a probability distribution as follows. P(x) 0.2 2 0.5 3 1 0.3 A sample of 2 is drawn and its mean, X, calculated. Find the probability X = 2.5 Round off to three decimal places
Consider the following probability distribution: x P(x) 1 0.1 2 ? 3 0.2 4 0.3 What must be the value of P(2) if the distribution is valid? A. 0.6 B. 0.5 C. 0.4 D. 0.2 What is the mean of the probability distribution? A. 2.5 B. 2.7 C. 2.0 D. 2.9
x P(x) 0 0.3 1 0.15 2 0.05 3 0.5 Find the mean of this probability distribution. Round your answer to two decimal places.
X 0 P(x) 0.05 0.15 0.3 1 2 3 0.5 Find the mean of this probability distribution. Round your answer to one decimal place. Question Help: Video Message instructor Submit Question
Can you answer questions 2,3,4 &show work 10 out of 10 points Question 1 A population has a mean of 60 and a standard deviation of 30. Samples of size 16 are randomly selected. Calculate the standard deviation of the sample distribution of X. Round off to 3 decimal places. 15 out of 15 points Question 2 Samples of size 16 are drawn from a population. The sampling distribution for X has a standard deviation of 0.25. Find the standard...
OX 1 P(x) 0.3 0.2 0.15 0.35 2 3 Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal places
Suppose a population has a mean of mu equals 54 and a standard deviation of sigma equals 15. A sample of size n=36 is taken. The sampling distribution of the sample mean has which of the following characteristics? mu subscript top enclose x end subscript equals 1.5 and sigma subscript top enclose x end subscript space equals space 2.5 mu subscript top enclose x end subscript equals 1.5 and sigma subscript top enclose x end subscript space equals space 15...
The random variable X has probability distribution 1 3 5 7 9 P(X=x) 0.2 0.3 0.2 0.15 0.15 Find E(X) and Var(X)
1) A sample of size 25 is chosen from a population. Assume the probability distribution is normal. If the mean of the sample is 80 and the standard deviation is 6, find the lower bound of the 99% confidence interval. Round off to three decimal places. 2) A sample of size 36 is chosen from a population. The sample mean is 50 and the standard deviation is 5. Find the upper limit of the 95% confidence interval for the population...
X 0 a P(x) 0.3 0.25 0.25 0.2 3 Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal places License