The X2 distribution is used for the comparison of two ______.
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The X2 distribution is used for the comparison of two ______.
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- The following is a two-way table showing preferences for an award (A, B, C) by gender for the students sampled in survey. Test whether the data indicate there is some association between gender and preferred award. A B C Total Female 20 76 73 169 Male 11 73 109 193 Total 31 149 182 362 Chi-square statistic=_____________ p-value= _________ Conclusion: (reject or do not reject H0) Does the test indicate an association between gender and preferred award? (yes/no)When the variance _____ the groups is _____ and the variance _____ the groups is _____, we can expect a large F-ratio. a. between; large; within; small b. between; small; within; small c. between; small; within; large d. between; large; within; largeAn analysis of variance produces SSetween 30, SSwithin " 60, and an F-ratio with df 2, 15. For this analysis, what is the F-ratio? O 2.00 O 0.50 O 3.75 O 0.27
- A researcher is interested in the relationship between birth order and personality. A sample of n= 100 people is obtained, all of whom grew up in families as one of three children. Each person is given a personality test, and the researcher also records the person’s birth-order position (1st born, 2nd, or 3rd). The frequencies from this study are shown in the following table. On the basis of these data, can the researcher conclude that there is a significant relation between birth order and personality? Test at the .05 level of significance. Birth Position 1st 2nd 3rd Outgoing 13 31 16 Reserved 17 19 4 The critical value is: Our calculated chi-square is:…Suppose that a certain paper included the accompanying data on the tar level of cigarettes smoked for a sample of male smokers who died of lung cancer. Tar Level Frequency Low 108 Medium 383 High 568 Very high 155 Assume that the sample is representative of male smokers who die of lung cancer. Calculate the value of the ?2 test statistic that could be used to test whether the proportions of male smoker lung cancer deaths are not equal for all of the four tar level categories. The expected values are 303.5 for each of the four cells. (Round your answer to three decimal places.) ?2 =A researcher is interested in the relationship between birth order and personality. A sample of n= 100 people is obtained, all of whom grew up in families as one of three children. Each person is given a personality test, and the researcher also records the person’s birth-order position (1st born, 2nd, or 3rd). The frequencies from this study are shown in the following table. On the basis of these data, can the researcher conclude that there is a significant relation between birth order and personality? Test at the .05 level of significance. Birth Position 1st 2nd 3rd Outgoing 13 31 16 Reserved 17 19 4 The expected frequencies for Outgoing, Birth Position 1st is: The expected frequencies for…
- Each of the boxplots shown summarizes 24 student scores on a recent test in two different classes. The boxplots are drawn using a common numerical scale. Which of the following must be true? 1. The lower 25% of Class B are much more spread out than the lower 25% of Class A 2. More people scored below the lower quartile for Class A than Class B 3. The distribution for Class B is skewed left and has a noticeable outlier as well, while the distribution for Class A is somewhat skewed right 4.Class A had more people between the median and the lower quartile than Class B. 3.The distribution for Class A is somewhat symmetric, while the distribution for Class B is skewed right with a noticeable outlier as wellAll of the following statements are true about independent-samples t tests EXCEPT ______. IS it 1- they can be used when the population variance is unknown OR 2 - they can be used when the sample means are unknownSuppose a box contains 4 balls numbered 1,3,5,7. Two balls are randomly chosen from this box WITH REPLACEMENT.
