1.You are conducting a test of independence for the claim that there is an association between the row variable and the column variable. X Y Z A 18 14 15 B 43 37 40 What is the chi-square test-statistic for this data? χ2 = [three decimal accuracy]
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1.You are conducting a test of independence for the claim that there is an association between the row variable and the column variable.
| X | Y | Z | |
|---|---|---|---|
| A | 18 | 14 | 15 |
| B | 43 | 37 | 40 |
What is the chi-square test-statistic for this data?
| χ2 = | |
| [three decimal accuracy] |
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- You are conducting a test of independence for the claim that there is an association between the row variable and the column variable. X Y Z A 46 23 53 B 46 26 40 The expected observations for this table would be X Y Z A B The resulting Pearson residuals are: X Y Z A B What is the chi-square test-statistic for this data?χ2=χ2= Report all answers accurate to three decimal places. CalculatorYou are conducting a test of independence for the claim that there is an association between the row variable and the column variable. X Y Z A 40 30 16 B 32 17 19 The expected observations for this table would be X Y Z A B What is the chi-square test-statistic for this data? (2 decimals)χ2=You are conducting a test of independence for the claim that there is an association between the row variable and the column variable. X Y Z A 46 23 53 B 46 26 40 The expected observations for this table would be X Y Z A B The resulting Pearson residuals are: X Y Z A B What is the chi-square test-statistic for this data?χ2=χ2= Report all answers accurate to three decimal places.
- 5.You are conducting a test of independence for the claim that there is an association between the row variable and the column variable. Red Blue Green Male 35 30 12 Female 50 52 25 What is the chi-square test-statistic and the corresponding p-value for this data? χ2 = [three decimal accuracy] p-value = [three decimal accuracy]You are conducting a test of independence for the claim that there is an association between the row variable and the column variable. X Y Z A 42 49 30 B 27 39 21 The expected observations for this table would be X Y Z A B The resulting Pearson residuals are: X Y Z A B What is the chi-square test-statistic for this data?χ2=Report all answers accurate to three decimal places.a) Find Beta1_hat from the above information.b) Find Beta0_hat from the above information.c) Find the standard error of the residual from the above information.d) Find the R-squared of the mode e) Which of the following parameters are statistically significant?beta0_hatbeta1_hatAll of the aboveNone of the above
- If the value of Cronbach’s alpha is 0.07, it means ___________; a. Research instrument is not reliable b. Research instrument is internally consistent c. Data is reliable d. Data is internally consistentA dietitian wishes to see if a person’s cholesterol level will be changed if the diet is supplemented by a certain mineral. Four subjects were pre-tested, and they took the mineral supplement for a 6-week period. The results are shown in the table. Is there sufficient evidence to conclude that the population mean of cholesterol levels has been changed after six weeks at α=0.2α=0.2? Assume that the differences are from an approximately normally distributed population. Subject Cholestrol Level (mg/dl) Cholestrol Level after 6 Weeks (mg/dl) dd ¯dd¯ (d−¯d)2(d-d¯)2 1 206 217 11 2 219 184 -35 3 202 204 2 4 213 205 -8 Total -30 a) Calculate the mean, the sum of the squared deviation from the mean, and the standard deviation of differences. Do not include the unit for each answer: ¯d=d¯= (do not round) ∑(d−¯d)2=∑(d-d¯)2= (do not round) sd=sd= (rounded to one decimal place) b) Perform the hypothesis test in the following steps: Step 1.…You are conducting a test of independence for the claim that there is an association between the row variable and the column variable. X Y Z A 28 8 47 B 22 12 42 The expected observations for this table would be X Y Z A Correct Correct Correct B Correct Correct Correct The resulting Pearson residuals are: X Y Z A B
- The test statistic of z = 1.42 is obtained when testing the claim that p>0.1. A.identify the phyothesis test as being two-tailed, left-tailed, or right-tailed. B.find the p-value. C. Using a significance level of o=0.05, should we reject H0 or should we fail to reject H0?A fisheries biologist collected a random sample of fish from a lake and conducted a chi-square goodness-of-fit test to see if the distribution of fish changed over time. The table below shows the distribution of fish that were put into the lake when it was originally stocked. Fish Type Trout Bass Perch Sunfish Catfish Percent 25% 25% 20% 15% 15% The biologist found evidence to reject the null hypothesis in favor of the alternative hypothesis. Which of the following represents the alternative hypothesis of the test?1. What does it imply if if more values are concentrated above the mean? (Skewness) And would the value of skewness be less than, greater than, or equal to 0? 2. In case the data is highly skewed, can we still rely on the kurtosis coefficient? Why or why not? 3. Can the z-score be a real measure of dispersion?
