Mathematics, 10.03.2020 20:34 miles45
Scores on an examination are assumed to be normally distributed with a mean of 78 and a variance of 36.
a. What is the probability that the person taking the examination scores higher than 72?
b. Suppose the students scoring in the top 10% of the distribution are to receive an A grade. What is the minimum score that the student must achieve to earn an A?
c. What must the cut-off point be for passing the examination if the examiner wants only the top 28.1% of all scores to be passing?
d. Approximately what proportion of students have scores 5 or more points above the score that cuts off the lowest 25%.
f. If it is known that the students score exceeds 72, what is the probability that his score exceeds 84?
Answers: 1
Mathematics, 21.06.2019 16:00
65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.
Answers: 3
Mathematics, 21.06.2019 18:00
Look at arnold's attempt to solve the equation for b: 3b = 12 b = 3 ยท 12 b = 36 describe the mistake that arnold made.
Answers: 2
Mathematics, 22.06.2019 00:50
To diagonalize an nxn matrix a means to find an invertible matrix p and a diagonal matrix d such that a pdp d p ap or [1 3 dh epap 3 let a=-3 -5 -3 3 3 1 step 1: find the eigenvalues of matrix a "2's" step 2: find the corresponding eigenvectors of a step 3: createp from eigenvectors in step 2 step 4 create d with matching eigenvalues.
Answers: 3
Mathematics, 22.06.2019 01:30
Jahdzia wears her winter coat when the temperature is colder than -4 degrees celsius. write an inequality that is true only for temperatures (t) at which jahdzia wears her winter coat.
Answers: 3
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