Statistics questions

 

For a particular IQ test that has a normal distribution, let’s say that the mean score is 100 and the standard deviation is 15. Using what you know about the properties of the normal distribution, determine what percentile each of the following students is at (that is to say, what percentage of students scored BELOW each of the observations below).

Question 1: A student scores an 85 (1 pt):

Question 2: A student scores a 130 (1 pt):

 

Question 3: With the distribution properties from the previous question, calculate a z-score for a student who scored 118 on the IQ test (2 pt).

 

Question 4: Based on that z-score, use the table in the textbook to determine the percentile standing of the student who scored 118. (1 pt)

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Status NEW Posted 18 Aug 2017 07:08 AM My Price 5.00

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