Question

The probability that a student graduating from West Texas A&M University has student loans to pay off after graduation is 0.60. If two students are randomly selected from this university, what is the probability (rounded to the nearest two decimal places) that neither of them has student loans to pay off after graduation?

The following table gives the frequency distribution of the number of telephones owned by a sample of 50 households selected from a city.

Number of Telephones Owned   Frequency (f)
0   3
1   20
2   14
3   3
4   10
The relative frequency of the first class, rounded to two decimal places, is:

The temperatures (in degrees Fahrenheit) observed during selected seven days of summer in Los Angeles are:

78 99 68 91 105 75 85

The standard deviation, rounded to two decimal places, of these temperatures is:

The ages of all high school teachers in New York state have a bell-shaped distribution with a mean of 39 years and a standard deviation of 7 years. According to the empirical rule, the percentage of teachers in this state who are 32 to 46 years old is approximately:

The waiting times (in minutes) for 11 customers at a supermarket are:

14 9 15 4 4 7 9 11 14 2 6

The percentile rank for the customer who waited 11 minutes is 64%. Give a brief interpretation of this percentile rank.

Answer 1