To use Chi-square distribution in goodness of fit test, all observed frequecies

Question

To use Chi-square distribution in goodness of fit test, all observed frequecies have to be at least 5.

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True

False

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Assume a random sample is selected and you were asked to determine whether the data came from a normally distributed population. Your states hypotheses would be:

H0:The population does not have normal distribution.

Ha:The population has a normal distribution.

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True

False

Question 5

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How well do airline companies serve their customers? A study showed the following customer ratings: 3% excellent, 28% good, 45% fair, and 24% poor. In a follow-up study of service by telephone companies, assume that a sample of 400 adults found the following customer ratings: 24 excellent, 124 good, 172 fair, and 80 poor. Is the distribution of the customer ratings for telephone companies different from the distribution of customer ratings for airline companies? State the appropriate null and alternative hypothesis.

Select one:

a. H0: Distribution of customer rating for telephone companies is not different that airline companies. AND Ha: Distribution of customer rating for telephone companies is different that airline companies

b. H0:Distribution of customer rating for telephone companies is different that airline companies. AND Ha:Distribution of customer rating for telephone companies is not different that airline companies

c. H0:Distribution of customer rating for telephone companies is independent of airline companies. AND Ha:Distribution of customer rating for telephone companies is dependent of airline companies

d. H0:Distribution of customer rating for telephone companies is dependent of airline companies. AND Ha:Distribution of customer rating for telephone companies is independent of airline companies

Explanation / Answer

The chi-square goodness of fit test is appropriate when the following conditions are met:

Hence answer is False

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