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Author Question: When 253 college students are randomly selected and surveyed, it is found that 128 own a car. Find a ... (Read 55 times)

lb_gilbert

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on: Jul 25, 2018
When 253 college students are randomly selected and surveyed, it is found that 128 own a car. Find a 99 confidence interval for the proportion of all college students who own a car.
 
  A) 0.425 to 0.586 B) 0.455 to 0.557 C) 0.433 to 0.578 D) 0.445 to 0.567

Question 2

Commuting times for employees of a local company have a mean of 63.6 minutes and a standard deviation of 2.5 minutes. What does Chebyshev's Theorem say about the percentage of employees with commuting times between 56.1 minutes and 71.1 minutes?
 
  What will be an ideal response?


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mfedorka

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Reply #1 on: Jul 25, 2018
Answer to Question 1

A

Answer to Question 2

At least 89 of the commuting times should fall between 56.1 minutes and 71.1 minutes.


lb_gilbert

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Reply 2 on: Jul 25, 2018
Great answer, keep it coming :)

diana chang

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Reply 3 on: Yesterday
Wow, this really help

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