The following contingency table shows the number of two-bedroom ...

[mpobi80]

The following contingency table shows the number of two-bedroom apartments grouped by monthly rent and location.
 
  Monthly Rent York Lancaster Dover
  600 to under 700 6 14 7
  700 to under 800 23 17 20
  800 to under 900 10 16 12
 
  The probability that a randomly selected apartment from this group was located in York or Lancaster is ________.
  A) 0.350
  B) 0.435
  C) 0.688
  D) 0.712

Question 2

The time for a professor to grade an exam is normally distributed with a mean of 16.3 minutes and a standard deviation of 4.2 minutes. The interval around the mean that contains 68 of the times needed to grade exams is ________.
 
  A) 12.1, 20.5
  B) 7.9, 24.7
  C) 5.8, 26.8
  D) 3.7, 28.9

[emily12345]

Answer to Question 1

C

Answer to Question 2

A

[mpobi80]

Correct answers!

[emily12345]

Great! Please up vote