Chapter 11: Q. 53 (page 658)
Which test do you use to decide whether an observed distribution is the same as an expected distribution?
The goodness-fit-test .
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The mean and the median of the chi-square distribution are the same if .
A company packages apples by weight. One of the weight grades is Class apples. Class apples have a mean weight of , and there is a maximum allowed weight tolerance of above or below the mean for apples in the same consumer package. A batch of apples is selected to be included in a Classapple package. Given the following apple weights of the batch, does the fruit comply with the Class grade weight tolerance requirements. Conduct an appropriate hypothesis test.
(a) at the significance level
(b) at the significance level Weights in selected apple batch (in grams): ; ; ; ;; ; ; ; 157 ; 171; 152; 161 ; 141; 166; 172;
State the null and alternative hypotheses?
Determine the appropriate test to be used in the next three exercises.
An economist is deriving a model to predict outcomes on the stock market. He creates a list of expected points on the stock market index for the next two weeks. At the close of each day's trading, he records the actual points on the index. He wants to see how well his model matched what actually happened.
Is this a right-tailed, left-tailed, or two-tailed test?
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