Find the cut off score for the test

Assignment Help Basic Statistics

Reference no: EM133357611

Question 1: The state university desires to accept only the top 25% of all graduating senior high school who took their entrance test. This test has a mean of 200 and a standard deviation of 50. Find the cut off score for the test. Assume the variable is normally distributed.

Question 2: The average age of the company's presidents is 60 years old. Assume the variable is normally distributed. If the standard deviation is five years. find the probability that the age of a randomly selected president will be in the following range. a. Between 52 and 67 b. Between 57 and 70 c. Between 40 and 60

Question 3: In medical study. a researcher wishes to select respomdents in the middle of 45% ofthe population based on blood pressure. lfthe mean systolic blood pressure is 100 and the standard deviation is 20. find the upper and lower reading that would qualify respondent to participate in the study.

Reference no: EM133357611

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