For a continuous random variable x, the height of the function at ...

[809779]

For a continuous random variable x, the height of the function at x is
 a. the probability at a given value of x.
   b. 0.50, since it is the middle value.
   c. a value less than zero.
   d. named the probability density function f(x).

Question 2

It is crucial that the variance (measured in min2) of a production process be less than or equal to 25 . A sample of 22 is taken. The sample variance equaled 26.
 a. Construct a 90 confidence interval for the population variance.
  b. Construct a 90 confidence interval for the population standard deviation.
  c. State the null and alternative hypotheses to be tested.
  d. Compute the test statistic.
  e. The null hypothesis is to be tested at the 10 level of significance. Using the critical value approach, state the decision rule for the test.
  f. What do you conclude about the population variance?

[tennis14576]

Answer to Question 1

d

Answer to Question 2

a. 16.712 to 47.106
b. 4.088 to 6.863
c. H0: 2  25
Ha: 2 > 25
d. 21.84
e. Reject H0 if chi-square  29.615
f. Do not reject H0; no evidence to conclude that the population variance of the production process is more than 25.