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***URGENT - TEST*** 7. The weight of female college students is normally distributed with a mean...

***URGENT - TEST***

7. The weight of female college students is normally distributed with a mean of 150 lbs. and a standard deviation of 20 lbs. What weight represents the first quartile for female college students? Round your answer to two decimal places.

8. Suppose that prices of women's athletic shoes have a mean of $75.15 and a standard deviation of $17.89. What is the z-score of the mean
price $80.15 from a random sample of 50 pairs of women's athletic shoes

9. Suppose 56% of the students in a university are baseball players.  If a sample of 873 students is selected. What is the z-score of the sample
proportion 55% of the students who are baseball players

10. A quality control expert at LIFE batteries wants to test their new batteries. The design engineer claims they have a standard deviation of 86
minutes with a mean life of 505 minutes. If the claim is true, in a sample of 120 batteries, what is the probability that the mean battery life
  would be greater than 523.8 minutes? Round your answer to four decimal places.


























math   Statistics-And-Probability   
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