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Anon25 [30]
3 years ago
7

A student believes that the average grade on the statistics final examination is 87. A sample of 36 final examinations is taken.

The average grade in the sample is 83.96 with a sample standard deviation of 12. Carry out the hypothesis testing that the real mean is less than 87. Use a 0.05 level of significance.
Mathematics
1 answer:
Crazy boy [7]3 years ago
4 0

Answer:

A detailed answer is attached please

Download docx
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Each big square below represents one whole.
lapo4ka [179]

Answer:

119% i think

Step-by-step explanation:

there are two squares

one is completely filled so its 100% shaded

the other has 19 mini squares filled so it's 19%

add those and you get 119%

8 0
3 years ago
Which of the following is the product of the rational expressions shown
Crazy boy [7]

For this case we must find the product of the following expressions:

\frac {3x} {x + 1} * \frac {x} {x-7}

So:

\frac {3x ^ 2} {x ^ 2-7x + x-7} =\\\frac {3x ^ 2} {x ^ 2-6x-7}

So, we have to:

\frac {3x} {x + 1} * \frac {x} {x-7} = \frac {3x ^ 2} {x ^ 2-6x-7}

Answer:

\frac {3x ^ 2} {x ^ 2-6x-7}

Step-by-step explanation:

8 0
4 years ago
Read 2 more answers
park ranger spent $208 to buy 12 trees.Redwood trees cost $24 each and spruce trees cost $16 each. How many of each tree did the
katovenus [111]

Answer:

The park ranger bought 2 redwood trees and 10 spruce trees.

Step-by-step explanation:

24 * 2 = 48

208 - 48 = 160

160 / 16 = 10

7 0
3 years ago
i serve mom 1/12 and my brother 1/6 of the pot how much of the pot is left what operation should I use
Mumz [18]
The operation would be: 1-1/12-1/6=1-3/12=9/12=3/4
Good luck!
4 0
3 years ago
Read 2 more answers
A bookkeeper has a balance of $83.92. If she collects $76.75
kotegsom [21]

Answer:

The bookkeeper already has a balance of 83.92.  She collects 76.75 so that's 83.92+76.75 which equals to 160.67.  Then she pays out 38.58 so that's a deduction to what she already has.  160.67-38.58=122.09.

SO the bookkeeper has $122.09 left.

5 0
4 years ago
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