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(Solved): I I need help with C and D with this problem, if you can, please provide the steps for how ...
A set of final examination grades in an introductory statistics course is normally distributed, with a mean of \( / 6 \) and a standard deviation of 8 . Complete parts (a) through (d). a. What is the probability that a student scored below 85 on this exam? The probability that a student scored below 85 is (Round to four decimal places as needed.) b. What is the probability that a student scored between 68 and 94 ? The probability that a student scored between 68 and 94 is (Round to four decimal places as needed.) c. The probability is \( 25 \% \) that a student taking the test scores higher than what grade? The probability is \( 25 \% \) that a student taking the test scores higher than (Round to the nearest integer as needed.) standard deviation of 8 or a grade of 72 on a different exam, where the mean is 66 and the standard deviation is 3 ? Show your answer statistically and explain. A student is (Round to two decimal places as needed.)
Expert Answer
Given that, Mean (?)= 76 standard deviation (?) = 8 Let X be the Random Variable that Represents student scores X~Normal(76, 82) a) The probability th