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adoni [48]
3 years ago
5

Twenty randomly selected statistics students were given 15 multiple-choice questions and 15 open-ended questions, all on the sam

e material. The professor was interested in determining if students scored higher on the multiple-choice questions. This experiment is an example of ______.
Mathematics
1 answer:
nadya68 [22]3 years ago
8 0

Answer:

A paired T- Test

Step-by-step explanation:

In a paired sample t-test, every entity is measured two times(twice), resulting in pairs of observations. It is used to determine whether the mean difference between two sets of observations is zero or not.

An example would be to measure performance of patients before and after the medicine and analyze difference using sample paired t test.

<u><em /></u>

<em>Here, in the given statement, each student is provided with 15 multiple choice questions and 15 open ended questions on same material. It can also be inferred as each student given two sets of same material and their performance was being observed. Hence, it is a paired t-test.</em>

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Which triangle is a 30°-60°-90° triangle?
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5 0
3 years ago
Please help with this math problem ASAP! It is due tonight! Will give brainliest! :)
frosja888 [35]

Answer:

sin(x) = \frac{7}{25}

x = 16.26°

Step-by-step explanation:

First use Pythagorean theorem to find the length of the hypotenuse. Use a^2 + b^2 = c^2. Since we know a and b we can plug in to find c. When we plug in we get: (7)^2 + (24)^2 = c^2. When we solve this out we get 25 = c.

Now that we know the value of c, we also know sin(x) = \frac{opposite}{hypotenuse}. Using this we see that sin(x) = \frac{7}{25}.

To get the exact degree value of x, take the inverse sin of \frac{7}{25}:

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8 0
3 years ago
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Step-by-step explanation:

8 0
2 years ago
a fast food restaurant can produce a hamburger for $2.50. if the restaurant's daily sales are increasing at the rate of 30 hambu
anyanavicka [17]

Answer:

The daily cost of hamburger is increasing by $75

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