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Identify what makes flipping coin and keeping track of tails

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Reference no: EM13280554

1) A set of 50 data values has a mean of 15 and a variance of 25.  Find the standard score of a data value = 30.

Following are the American College Test (ACT) scores attained by the 25 members of a local high school graduating class:

21

24

23

17

31

19

19

20

19

25

17

23

16

21

20

28

25

25

21

14

19

17

18

28

20

 

Find P99, P90, and P80 for the ACT scores. [Hint:  Use nk/100 to find the location in the ordered data for each percentile.] All work must be show in order to get your assignment graded

2) How is a "discrete" variable different from a "continuous" variable?  Please give one example of each, and describe how these examples differ from one another.

Identify what makes flipping a coin and keeping track of tails a binomial experiment .

3) If the random variable z is the standard normal score and a > 0, is it true that P(z < -a) = P(z > a)? Why or why not?Then find the z-score for the standard normal distribution where:

Area = 0.32 in the left tail

Reference no: EM13280554

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