Flashcard Lesson 6.4 ~6.6
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•
Mathematics
•
11th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
When can you use a normal approximation for the sampling distribution of p?
Back
You can use a normal approximation when np ≥ 10 and n(1-p) ≥ 10.
2.
FLASHCARD QUESTION
Front
What is the probability of getting a sample of size 50 that has 15 or more students who believe Monday will be a snow day if 28% of all students believe it?
Back
The probability is 0.376.
3.
FLASHCARD QUESTION
Front
What is the average amount of sleep teenagers attending public high schools get each night?
Back
The average is 5.7 hours.
4.
FLASHCARD QUESTION
Front
What is the standard deviation of sleep for teenagers attending public high schools?
Back
The standard deviation is 1.7 hours.
5.
FLASHCARD QUESTION
Front
What is the probability that a randomly selected group of 35 high school students get more than 6 hours of sleep each night?
Back
The probability is 0.148.
6.
FLASHCARD QUESTION
Front
For the population of farm workers in New Zealand, what is the mean weekly income?
Back
The mean weekly income is $500.
7.
FLASHCARD QUESTION
Front
What is the standard deviation of weekly income for farm workers in New Zealand?
Back
The standard deviation is $160.
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