The amount of fuel used by jumbo jets to take off is normally distributed with a mean of 4000 gallons and a standard deviation of 125 gallons. What is the probability that the mean number of gallons of fuel needed to take off for a randomly selected sample of 40 jumbo jets will be less than 3950 gallons?
Statistics Final Exam

Quiz
•
Mathematics
•
12th Grade
•
Medium
Anthony Clark
Used 1+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
.0057
.025
.345
.781
2.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
The table above shows a television station's advertisement sales. The distribution of sales for one 24-hour day is given. Solve for the mean. Round to the nearest hundredth.
31.83
15.68
16.32
1.00
3.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
The table above shows a television station's advertisement sales. The distribution of sales for one 24-hour day is given. Solve for the standard deviation. Round to the nearest hundredth.
35.76
268.1
16.32
1279.35
4.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
The American Red Cross says that about 11% of the U.S. population has Type B blood. A blood drive is being held at your school. What is the probability that at most 2 of the first 10 blood donors has Type B blood?
0.088
0.697
0.214
0.912
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Choose the statistical question:
What time did you wake up this morning?
What time do 12th graders wake up each morning during the school week?
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The 40 yards sprint times for a soccer team are found to be normally distributed with a mean of 5.2 seconds and a standard deviation of 0.3 seconds. What is the z-score for a player who runs a time of 5.6 seconds?
-1.33
1.33
0.88
1.02
7.
MULTIPLE CHOICE QUESTION
1 min • 3 pts
The mean number of accidents a week at a company is 6.4 with a standard deviation of 1.5. What proportion of weeks would you expect to have less than 5 accidents?
0.6915
0.1762
0.8238
-0.93
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