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Company are interested in how a new spaghetti sauce made from green tomatoes (and green in color) will compare to their traditional red spaghetti sauce. They are worried that the green color will adversely affect the tastiness scores. They randomly assign subjects to either the green or red sauce condition. Participants indicate the tastiness of the sauce on a 10-point scale. Tastiness scores tend to be skewed. The scores follow.
Red Sauce Green Sauce
7 4
6 5
9 6
10 8
6 7
7 6
8 9
a. What statistical test should be used to analyze these data?
b. Identify H0 and Ha for this study.
c. Conduct the appropriate analysis.
d. Should H0 be rejected? What should the researcher conclude?
In chi-square goodness-of-fit test when there is close agreement between observed frequency and expected frequency, chi-square test value will be small.
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Test the hypothesis. Will you reject or not reject the null hypothesis at α = 0.05
Using a critical value, test hypothesis at the 1% level of significance.
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What can we say about the probability distribution of x? Is it approximately normal? What are the mean and standard deviation?
Find the critical value and test statistic value follows normal distribution.
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