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The score on an exam from a certain MAT 112 class, X, is normally distributed with μ=81.8, and σ=9.9.
NOTE: Assume for the sake of this problem that the score is a continuous variable. A score can thus take on any value on the continuum. (In real life, scores are often treated as if they were continuous values but are actually discrete in most cases.)
(a) Write the event ''a score equal to 68.8'' in terms of X:
(b) Find the probability of this event:
(c) Find the probability that a randomly chosen score is greater than 90.8:
(d) Find the probability that a randomly chosen score is between 68.8 and 90.8:
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listed are the ages in years of randomly selected race car drivers use a 0.05 significance level to test the claim that
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Based on these findings, can we reject the company's claim that the drug is equally effective for men and women? Use a 0.05 level of significance.
a certain brand of refrigerator has a lenght of life that is normally distributed with a mean and a standard deviation
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The mean score on a math test at milby high school was 50. the standard deviation was 10. If the same test was administered to the entire school district of 8th grade students, find the probability that the mean of the population(district) will be be..
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