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mart [117]
3 years ago
12

A statistics teacher conducted an experiment to test whether the use of a new review booklet will improve her students' semester

grades. The teacher randomly selected 20 students from her class and assigned the new review booklet to 10 of the students. The remaining 10 students did not use any review material.
At the end of the semester, the teacher reviewed the students' semester grades. The semester grades of the students who used the new review booklet were the same as the semester grades of the students who did not.

What can be concluded from the teacher's observations?

A. It can be concluded that the new review booklet does not improve students' semester grades.

B. It can be concluded that the new review booklet reduces students' semester grades.

C. There is not enough information to make any conclusions regarding the new review booklet.

D. It can be concluded that the new review booklet improves students' semester grades.
Mathematics
1 answer:
Gala2k [10]3 years ago
6 0

Answer:

C. There is not enough information to make any conclusions regarding the new review booklet.

Step-by-step explanation:

Given that A statistics teacher conducted an experiment to test whether the use of a new review booklet will improve her students' semester grades.

also given that The teacher randomly selected 20 students from her class and assigned the new review booklet to 10 of the students. The remaining 10 students did not use any review material.

The semester grades did not differ for both groups.

But we cannot conclude the booklet has no effect because,

i) The sample size is very small, only 10.  Hence not reliable

ii) We do not know the previous performance of both the groups. To ensure improvement the grades the students got in the previous exam also should be considered.

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yanalaym [24]
It is important to clearly understand all the important information's already given in the question. Based on those details the answer to the question can be easily determined.
In 17 hours the number of golf balls hit by Bill = 323
Then
In 1 hour the number of golf balls hit by Bill = (323/17) * 1
                                                                     = 19
So
The number of golf balls hit by Bill in 23 hours = 23 * 19
                                                                          = 437
So 437 balls will be hit by Bill in 23 hours. I hope the procedure is clear enough for you to understand. This procedure will help you to solve similar problems in future without requiring any outside help.
5 0
3 years ago
Read 2 more answers
Please help me with this
Vera_Pavlovna [14]

Answer:

226.19

Step-by-step explanation:

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The radius = diameter/2 = 6

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nexus9112 [7]
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3 years ago
Julie is digging a square area in her backyard a for a vegtable garden. If the area is 52 square feet, what is the approximate l
AURORKA [14]

Answer:

<em>The correct option will be:   (b) 7 feet.</em>

Step-by-step explanation:

Suppose, the length of the garden is  x feet.

As the <u>shape of the garden is like a square, then the area of the garden</u> will be: (length)^2 = x^2 feet²

Given that, the <u>area is 52 square feet</u>. So, the equation will be.......

x^2= 52\\ \\ x=\sqrt{52} = 7.211.... \approx 7

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Answer:

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Step-by-step explanation:

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