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3 years ago

For each of the following studies, say whether you would use a t test for dependent means or a t test for independent means.

Mathematics

1 answer:

Shtirlitz [24]3 years ago

5 0

Answer:

1. T test for independent means

2. T test for dependent means

3. T test for dependent means

Step-by-step explanation:

In number 1, the two groups are unrelated. The first group has 25 subjects and they're all unemployed. The second group has 24 subjects and their employment status is not stated and might not be the same all through. Also, the first group is receiving a new type of job skills program while the second group is taking the standard job skills program.

- The groups in the experiment are unrelated

- The tests in the research are unrelated

- The purpose of the research is unreasonable - the researcher seeks to measure how well all 49 subjects perform on 'a' job skills test! No comparison between the scores or mean scores of the two groups.

In number 2, the researcher uses the same subjects and also measures the same variable but twice. This is a good example of a study where the t test for dependent means can be taken. Same applies in case 3.

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4 years ago

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Step-by-step explanation:

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3 years ago

a survey was taken of children between the ages 7 and 12. let A be the event that the person rides the bus to school, and let B

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Answer:

The statement is true about whether A and B are independent eventa is fourth option:

A and B are not independent events because P(A/B)=0.375 and P(A)=0.25

Step-by-step explanation:

Let A be the event that the person rides the bus to school, then:

P(A)=75/300

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Let B be the event that the person has 3 or more siblings, then:

P(B)=24/300

P(B)=0.25

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Like P(A/B)=0.375 is different to P(A)=0.25 the events are not independent

Answer. Fourth option:

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