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Author Question: A quiz consists of 780 true or false questions. If the student guesses on each question, what is the ... (Read 93 times)

asmith134

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on: Jul 24, 2018
A quiz consists of 780 true or false questions. If the student guesses on each question, what is the standard deviation of the number of correct answers?
 
  A) 13.96424 B) 0 C) 2 D) 19.7484177

Question 2

A local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. The owner of the store has determined that home delivery will be successful if the average time spent on the deliveries does not exceed 32 minutes.
 
  The owner has randomly selected 23 customers and has delivered pizzas to their homes in order to test if the mean delivery time actually exceeds 32 minutes. Suppose the P-value for the test was found to be 0.0297. State the correct conclusion. A) At  = 0.025, we fail to reject H0. B) At  = 0.05, we fail to reject H0.
  C) At  = 0.02, we reject H0. D) At  = 0.03, we fail to reject H0.


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aruss1303

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Reply #1 on: Jul 24, 2018
Answer to Question 1

A

Answer to Question 2

A


asmith134

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Reply 2 on: Jul 24, 2018
Great answer, keep it coming :)

diana chang

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Reply 3 on: Yesterday
Excellent

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