Project #34677 - statistics

Question 1

A jar contains 58 blue marbles and 37 green marbles.

 

1.    If you randomly select a marble from the jar, what is the probability that you will get a blue marble?

 

a. Write out the fraction representing the probability.

    b. Write the probablility as a decimal or a percent.

 

2.    If you are selecting a random sample of n=5 marbles and the first 4 marbles are all blue, what is the proability that the fifth marble will be green?

 

a.    Write out the fraction representing the probability.

b.    Write the probablility as a decimal or a percent.

 

Question 2

For a normal distribution of μ=534.00 and standard deviation σ =108.00


 

1.     What is the percentile rank for X = 412?

a.    z = ?

b.    Percentile rank = ?

2.     What is the percentile rank for X = 726?

a. z = ?

b. Percentile rank = ?

Question 3

A normal distribution has a mean of μ=168.00 and standard deviation σ =14.00. Find the following values.

1.    The 33rd percentile.

a.    What z-score value will you use?

b.    33rd percentile = ?

2.    The 76th percentile.

a.    What z-score value will you use?

b.    76th percentile = ?

 

 

 

 

 

Subject Mathematics
Due By (Pacific Time) 07/05/2014 12:00 am
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