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pentagon [3]
3 years ago
6

"In one statistics course, students reported studying an average of 9.92 hours a week, with a standard deviation of 4.54. Treati

ng this class as the population, what percent of students study more than 8 hours? (Round z score to two decimal places.)"
Mathematics
1 answer:
Rudik [331]3 years ago
3 0

Answer:

66.28% of students study more than 8 hours

Step-by-step explanation:

The percent of students study more than 8 hour can be calculated as

P(X>8)=?

P(X>8)=P((X-mean)/sd>(8-9.92)/4.54)

The calculated z-score is -0.42.

P(X>8)=P(Z>-0.42)

P(X>8)=P(0<Z<-0.42)+P(0<Z<∞)

P(X>8)=0.1628+0.5=0.6628.

Thus, 66.28% of students study more than 8 hours.

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DanielleElmas [232]

Answer:I think the answer is 6x because

18= 6x3

42= 6x7

30= 6x5

Step-by-step explanation:

18= 6x3

42= 6x7

30= 6x5 And 6x(3x+7x^3+5x^4) it became 18x^2+42x^4+30x^5

4 0
3 years ago
pamela bought two caps at $9 each (c).she also bought two jean shirts that together cost her $70 (j). if she got a discount of $
enot [183]

Answer:

$71

Step-by-step explanation:

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8 0
3 years ago
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algol [13]
(0,3.75)(15,0)
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now we sub
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y = -1/4x + 15/4
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4 0
3 years ago
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Answer:

$399.98

Step-by-step explanation:

Given

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Required

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