AP Statistics 2017

4. 
   

        The heights of  women   ages    30  to  39  years   are approximately   normally    distributed,    with    a   mean    of  66

   
   

   inches and a standard deviation of 2.6 inches. If a particular woman is 61.25 inches tall, her z -score
   is about
   (A) –4.75
   (B) –1.83
   (C) 0.027
   (D) 1.83
   (E) 4.75

   
   


5. States provide data on average ACT scores by school. One state reported the average scores for 450
   schools. The average scores were approximately normally distributed, with a mean of 21.9 and a
   standard deviation of 2.5. The shortest interval of average scores that contains 90 schools is
   (A) [20.58, 23.22]
   (B) [18.69, 21.90]
   (C) [21.90, 25.11]
   (D) [21.27, 22.53]
   (E) [18.69, 25.11]

Answers

1. C

2. B

3. C

4. B

5. D