1. "An airline tracks data on its flight arrivals.  Over the past six months the following data is collected on one route:
Arrived late: 70
Arrived on time: 150
Arrived early: 15
Cancelled: 25
What is the probability that a flight arrives early?"

Options:
A) 15% or more
B) Between 4% and 10%
C) Less than 4%
D) More than 10% but less than 15%

2. "The number and frequency of Atlantic hurricanes annually from 1940 through 2015 is shown here.  This means, for instance, that no hurricanes occurred during 5 of these years, only one hurricane occurred in 16 of these years, and so on.

Number of hurricanes each year follows a Poisson distribution.  Find the mean number of hurricanes per year and calculate the probability of having 5 or 6 hurricanes per year.  Enter this probability as a decimal number.

Between 0.15 and 0.152

3. Based upon extensive data from a national high school educational testing program, the standard deviation of national test scores for critical reading was found to be 115 points.  If a sample of 500 students are given the test, what would be the standard error of the mean?
Between 5.14 and 5.143

Transcribed Image Text:

Number 0 1 2 3 4 5 6 7 8 10 12 Frequency 5 16 20 14 4 5 5 3 2 1 1 Number 0 1 2 3 4 5 6 7 8 10 12 Frequency 5 16 20 14 4 5 5 3 2 1 1

Answer rating: 100% (QA)

1 C Less than 4 The probability that a flight arriv... View the full answer