As part of a study designed to test the safety of automobiles, the National Transportation Safety Board collected and reviewed data about the effects of an automobile crash on test dummies. Cars with dummies in the front seats were crashed into a wall at a speed of 35 miles per hour. We want to know the proportion of dummies in the driver’s seat that would have had head injuries if they had been actual drivers. Head injury data for the dummies in the driver’s seat are listed on the spreadsheet. Use a 0.05 significance level. Find the P-value to test the null hypothesis that the different weight categories have the same mean. Do the sample data suggest that larger cars are safer? Subcompact Compact Midsize Fullsize

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Q: Could two samples have the same range but different means? Explain.

A: Yes, Two samples have the same range but different means.

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Q: Consider the Sample mean, Xn. estimator of population as an

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Q: In mileage consumption testing, automobiles were road-tested for both Metropolitan and Fre-…

A: metropolitan freeway 16 19 17 20 19 18 14 18 18 19 15 17 16 17 16 18 18 19

Q: In a test of the effectiveness of garlic for lowering cholesterol, 49 subjects were treated with raw…

A:

Q: Differentiate the three kinds of quantile; quartiles, decile, and percentile.

A: Quantiles determine that part of the data set which falls under and above a particular limit.

Q: What proportion of the sample reported that they had been cyberbullied?

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Q: Find the third quartile for this data set.

A: Given:

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Q: What is the average IQ of these subjects?

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Q: analyze her data

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A: Introduction: It is required to identify the observational units and the population being studied.

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Q: In psychology, what are two factors that decrease statistical power?

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Q: In almost all research studies, data are obtained from samples. A. True в. False

A: In almost all the research studies ,data are obtained from the samples  True  False

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Q: How is the goal served by computing a measure of variability?

A: We need to find the goal served by computing a measure of variability

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Q: In a class of 31 students, how many would be above the third quartile?

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Q: In the data set below, what is the upper quartile?

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.