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Elan Coil [88]
3 years ago
6

Suppose we want to study the average weight of children in the US. We collect a random sample of 345 first graders in three diff

erent US states. Which of the following hypothesis tests is best suited to determine whether there is a difference in the average student weight among the three states? (HINT: How many states?)
a. Two-sample t-test
b. F-Test
c. Paired t-test
d. Z-test
Mathematics
1 answer:
natta225 [31]3 years ago
3 0

Answer:

F test

Step-by-step explanation:

Given that we want to study the average weight of children in the US. We collect a random sample of 345 first graders in three different US states

Since there are three samples representing three populations to check whether they have same average weight we have to use F test.

Two sample t test is wrong because here there are three samples.

Paired t test is done for the same item subject to two different tratments

Z test is done for comparing of a mean with population mean or proportion if the population standard deviation is known.

Hence here since the number of groups are more than two, only F test is best suited to determine whether there is a difference in the average student weight among the three states

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3 years ago
Which list shows the numbers in order from least value to greatest value
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The answer is H

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Oh and by the way if you don’t know how to turn a fraction into a decimal you simply divide the top number by the bottom number for example 1/2 you take 1 and divide it by 2 which gives you .5 or 12/13 = .923076 hope this makes sense and that this helped
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2.24 Exit poll: Edison Research gathered exit poll results from several sources for the Wisconsin recall election of Scott Walke
iVinArrow [24]

Answer:

0.4929 = 49.29% probability that he voted in favor of Scott Walker

Step-by-step explanation:

Bayes Theorem:

Two events, A and B.

P(B|A) = \frac{P(B)*P(A|B)}{P(A)}

In which P(B|A) is the probability of B happening when A has happened and P(A|B) is the probability of A happening when B has happened.

In this question:

Event A: Having a college degree.

Event B: Voting for Scott Walker.

They found that 57% of the respondents voted in favor of Scott Walker.

This means that P(B) = 0.57

Additionally, they estimated that of those who did vote in favor for Scott Walker, 33% had a college degree

This means that P(A|B) = 0.33

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3 years ago
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ratelena [41]
With the equation:
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D ) 0.15 * 200 = 30
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Answer:
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Answer:

Step-by-step explanation:

3 out of 18 chance

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