Arnold compares the means of three groups and calculates a value of -2.01 for the F-ratio. This implies ______.

A) the mean of the first group is the highest of the three groups
B) the mean of the third group is the highest of the three groups
C) the differences between the means are statistically significant
D) he has made an error in his calculations

Katelyn is shopping for a cellular phone service.Trenton Bell charges a monthly fee of $40 for up to 500 minutes.For every minute over 500,it charges an additional $0.18.Write a piecewise function to represent the cost of this plan.

A Poisson process is the occurrence of a series of events of a given type in a random pattern over time or space such that (1) the number of occurrences within a specified time or space can equal any integer between zero and infinity, (2) the number of occurrences within one unit of time or space is independent of that in any other such (non-overlapping) unit, and (3) the probability of occurrences is the same in all such units.

A researcher at Florida International University (FIU) wants to estimate the average number of credits earned by students last semester at FIU.She randomly selects 750 students from last semester and finds that they averaged 13.75 credits per student.The population of interest to the researcher is:

A) all FIU students.
B) all college students.
C) all FIU students enrolled last semester.
D) the 750 FIU students selected at random.

Solve the following set of equations graphically:
y = 2x + 11
5x + 3y = 0