A sample statistic, such as x, that estimates the value of the ...

[erika]

A sample statistic, such as x, that estimates the value of the corresponding population parameter is known as a _____.
 a. point estimator
  b. parameter
  c. population parameter
  d. parameter and a population parameter

Question 2

The probability function for the number of insurance policies John will sell to a customer is given by f(x) = .5  (x/6) for x = 0, 1, or 2
 a. Is this a valid probability function? Explain your answer.
  b. What is the probability that John will sell exactly 2 policies to a customer?
  c. What is the probability that John will sell at least 2 policies to a customer?
  d. What is the expected number of policies John will sell?
  e. What is the variance of the number of policies John will sell?

[zoeyesther]

Answer to Question 1

a

Answer to Question 2

a. yes f(x)  0 and f(x) = 1
b. .167
c. .167
d. .667
e. .556