When a hypothesis test is to be conducted regarding a population ...

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When a hypothesis test is to be conducted regarding a population variance, the test statistic will be:
 
  A) a t-value from the t-distribution.
  B) an x2 value from the chi-square distribution.
  C) a z-value from the standard normal distribution.
  D) a binomial distribution p value.

Question 2

Three events occur with probabilities P(E1 ) = 0.35, P(E2 ) = 0.15, P(E3 ) = 0.40. If the event B occurs, the probability becomes P(E1B) = 0.25, P(B) = 0.30. Calculate P(E1 and B).
 
  A) 0.575
  B) 0.075
  C) 0.021
  D) 0.475

[Gabe]

Answer to Question 1

B

Answer to Question 2

B

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Gracias!

[ricroger]

TYSM