Dempsey's Garage repairs domestic and import cars. The following table shows the number of cars that have been serviced by age and type during the last month.
Age Domestic Import
0 to under 5 years old 8 6
5 to under 10 years old 22 12
10 to under 15 years old 12 20
The probability that a randomly selected car from this group was a domestic car or from 0 to under 5 years old is ________.
A) 0.10
B) 0.19
C) 0.60
D) 0.80
Q. 2According to LIMRA, 77 of husband-wife families with kids under 18 years old have life insurance. A random sample of six husband-wife families was selected. What is the probability that five or more families have life insurance?
A) 0.3667
B) 0.4025
C) 0.5820
D) 0.6621
Q. 3Failing to reject the null hypothesis and accepting the null hypothesis do not refer to the same conclusion.
Indicate whether the statement is true or false
Q. 4The 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. What is the probability that a randomly selected exam will require more than 15 minutes to grade?
A) 0.3783
B) 0.4548
C) 0.5664
D) 0.6217