2. A poll was taken this year asking college students if they considered themselves overweight. A similar poll was taken 5 years ago. Five years ago, a sample of 270 students showed that 120 considered themselves overweight. This year a poll of 300 students showed that 140 considered themselves overweight. At a 5% level of significance, test to see if there is any difference in the proportion of college students who consider themselves overweight between the two polls. What is your conclusion?

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Q: Find the t-value and p-value

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Q: A factory for the production of light bulbs took a random sample of 200 units and found that 18 of…

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Q: The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.35…

A:

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A: Given that Sample sizes n1=24 , n2=24 S1=47.15  s2=75.46

Q: The digital marketing specialist would like to test the claim that the percent of customers who use…

A: Formula : Test statistic

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A: Null Hypothesis: H0: There is no difference in the mean blood glucose values at 30 minutes compared…

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A: Given that  Sample sizes n1=12 , n2=17 Sample means x1=454.81 , x2=387.23

Q: research group conducted an extensive survey of 3113 wage and salaried workers on issues ranging…

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A: It is given that, a simple random sample of 28 observations was taken from a large population with…

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A: It is given that p hat is 0.7368 (= 70/95).

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A:

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A:

Q: Assume you did an experiment with 3 groups and 16 subjects per group. The sample variances in the…

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A:

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Q: A political scientist claims that 38% of first-year college students characterize themselves as…

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A:

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.