The scores on a test form a normal distribution with a mean of 78 and a standard deviation of 6. A test is selected at random. Find the probability the score is between 74 and 87.
What will be an ideal response?
0.6818
Mathematics
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Solve the problem.Find the mean for the scores: 603, 550, 359, 356, 608, 350, 344, 529, 470, 482.
A. 456 B. 476 C. 474.6 D. 465.1
Mathematics
Find the sum.
+ 
+ 
+ 
+ ... + 
A. 
(1 - 3n)
B. - 
(1 - 3n)
C. - 
(1 - 3n)
D. - 
(1 - 3n)
Mathematics
Determine the number that should be added to complete the square of the expression. Then factor the expression.x2 - 8x
A. 16; (x + 4)2 B. 16; (x - 4)2 C. 16; (x - 4)(x + 4) D. prime
Mathematics
Add.
+ 
A. 15n5 - 7n3 - 6 B. 2n8 C. 11n5 - 17n3 + 8 D. 11 - 17n5 + 8n3
Mathematics