Prob Stats Final Review

What is the probability of drawing a red card from a standard deck of cards?

• 1/52
• 13/52
• 1/2
• 4/52

Find the probability of rolling greater than a 1 on a single die.

• 6/6
• 5/6
• 4/6
• 1/6

If Gonzalo's score is 87, the class average is 82, and the SD is 4, what is Gonzalo's Z-score?

• -1.25
• +1.25
• +1.20
• +1.02

A test is given that has a mean of 70 and a standard deviation of 13. If a student's Z-score is +1, the student's score before conversion was:

• 70
• 83
• 57
• Cannot be determined from the information given.

The mean and standard deviation of a population are 200 and 20, respectively. 
What is the probability of selecting one data value less than 190?

• 69%
• 42%
• 31%
• 58%

Find the area under the standard normal curve to the right of z = -2.67.

• 0.0869
• 0.9962
• 0.0008
• 0.1234

A random sample of 40 trees was used to estimate the mean height of all trees at a tree farm.

Summary statistics for this sample are given below.

N MEAN MEDIAN STDEV MIN Q1 Q3 MAX

40 18.50 18.0 5.169 10.0 14.5 22.0 29.0

Which one of the following stem-and-leaf plots most likely represents the actual sample data set?

NOTE: 1|4 = 14 (stem = tens and leaf= ones)

• 
• 
• 
• 
• 

A manufacturer of equipment for boats is interested in producing a new type of marine radio with an emergency homing beacon. It is expensive to set up production, so the manufacturer wants to determine the level of interest in purchasing such a device before money is invested in this venture. The company is located on the West Coast, which is its primary market. The company decides to randomly select 12 of the marinas on the West Coast and then demonstrate the prototype to all of the boat owners at these marinas and gauge the potential market for the device. What sampling method did the company use to gather its data?

• Simple Random Sample

• Systematic

• Stratified

• Cluster

• Convenience

Which of the following are resistant to outliers?

• The mean and standard deviation

• The median and standard deviation

• The median and the range

• The median and IQR

• The range and IQR

A car rental agency has two locations, one by the airport and the other downtown. The agency rents 70% of its cars at the airport and the rest downtown. At the airport, 20% of the rentals are Sport Utility Vehicles (SUVs). At the downtown location, 40% are SUVs. If a customer is selected at random, what is the probability that she did NOT rent an SUV?

• 0.74

• 0.70

• 0.66

• 0.40

• 0.26