A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 73 and a standard deviation of 7. Complete parts (a) through (d).
a. What is the probability that a student scored below 86 on this exam?
(Round to four decimal places as needed.)
b. What is the probability that a student scored between 66 and 93?
(Round to four decimal places as needed.)
c. The probability is 55% that a student taking the test scores higher than what grade?
(Round to the nearest integer as needed.)
d.If the professor grades on a curve (for example, the professor could give A's to the top 10% of the class, regardless of the score), is a student better off with a grade of
80 on this exam or a grade of 74 on a different exam, where the mean is 68 and the standard deviation is 3?
Show your answer statistically and explain.
A student is
▼
worse off
better off
with a grade of 80 on this exam because the Z value for the grade of 80 is ________ and the Z value for the grade of 74 is ___________
(Round to two decimal places as needed.)
A set of final examination grades in an introductory statistics course is normally distributed, with a...
examination grades in an introductory statistics course is normally distributed, with a mean of 75 and a standard deviation of 7. Complete parts (a) through (d) a. What is the probablity that a student scored below 87 on this exam? The probability that a shudent scored below 87 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 soored between 68 and 94 is...
A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 75 and a standard deviation of 8. Complete parts (a) through (d). a. What is the probability that a student scored below 88 on this exam? The probability that a student scored below 88 is 0.94790.9479. (Round to four decimal places as needed.) b. What is the probability that a student scored between 67 and 94? The probability that a student scored...
A set of final examinations grades in an introductory statistics course is normally distributed, with a mean of 75 and a standard deviation of 7. Complete parts (a) through (d). a.) What is the probability that a student scored below 87 on this exam? b.) What is the probability that a student scored between 68 and 90? c.) The probability is 25% that a student taking the test scores higher than what grade? d.) If the professor grades on a...
A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 78 and a standard deviation of 8. What is the probability that a student scored between 70 and 99? The probability that a student scored between 70 and 99 is =?
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The professor of a introductory calculus class has stated that, historically, the distribution of final exam grades in the course resemble a Normal distribution with a mean final exam mark of μ=63μ=63% and a standard deviation of σ=9σ=9%. If using/finding zz-values, use three decimals. (a) What is the probability that a random chosen final exam mark in this course will be at least 73%? Answer to four decimals. (b) In order to pass this course, a student must have a...
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