A company that makes shampoo wants to test whether the average ...

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A company that makes shampoo wants to test whether the average amount of shampoo per bottle is 16 ounces.
 
  The standard deviation is known to be 0.20 ounces. Assuming that the hypothesis test is to be performed using 0.10 level of significance and a random sample of n = 64 bottles, which of the following would be the upper tail critical value?
  A) 1.28
  B) 1.645
  C) 1.96
  D) 2.575

Question 2

A package delivery service claims that no more than 5 percent of all packages arrive at the address late.
 
  Assuming that the conditions for the binomial hold, if a sample of size 10 packages is randomly selected, and the 5 percent rate holds, what is the probability that exactly 2 packages in the sample arrive late?A) 0.0746
  B) 0.9884
  C) 0.2347
  D) 0.0439

[cloudre37]

Answer to Question 1

B

Answer to Question 2

A

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Correct answers!

[cloudre37]

Great! Please up vote