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This question was created from STAT 200_Final_Exam_Spring_2019_OL1.pdf

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This question was created from STAT 200_Final_Exam_Spring_2019_OL1.pdf
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11. Recent research suggests that car ownership may have peaked . The following probability distribution
table shows the random variable .*, where & is number of cars owned by household :
0. 10
0. 22
0. 45
7.
0.0.5
` Determine the mean of’* [ Round the answer to two decimal places ) . Show all work. Answers*
without supporting work will not receive credit
Determine the standard deviation of *. ( Found the answer to two decimal places ) Show all
work. Answers without supporting work will not receive credit.
12. Mimi just started her tennis class three weeks ago. On average , she Is able to return 20%’ of her
Opponent S SERVES. ASSUME HEY Opponent SERVES & times
( a ) Let* be the number of returns that Mimi gets . As WE know , the distribution of’* is a binomial
probability distribution . What is the number of trials ( 1 )_ probability of successes ( P ) and
probability of failures ( 4), respectively ?
( 6) Find the probability that she returns at least I of the & serves from her opponent . ( Round the
answer to } decimal places ) Show all work. Just the answer , without supporting work, will!
receive no credit .

 
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