b). What is the minimum calculated value necessary to reach the .01 alpha level with 3 degrees of freedom in a Chi-Square cross-tabulation?
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b). What is the minimum calculated value necessary to reach the .01 alpha level with 3 degrees of freedom in a Chi-Square cross-tabulation?
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- 1.56 Longleaf pine trees. The Wade Tract in Thomas County, Georgia, is an old-growth forest of longleaf pine trees (Pinus palustris) that has survived in a relatively undisturbed state since before the settlement of the area by Europeans. A study collected data on 584 of these trees. One of the variables measured was the diameter at breast height (DBH). This is the diameter of the tree at 4.5 feet, and the units are centimeters (cm). Only trees with DBH greater than 1.5 cm were sampled. Here are the diameters of a random sample of 40 of these trees: PINES 27 10.5 13.3 26.0 18.3 52.2 9.2 26.1 17.6 40.5 31.8 47.2 11.4 2.7 69.3 44.4 16.9 35.7 5.4 44.2 2.2 4.3 7.8 38.1 2.2 11.4 51.5 4.9 39.7 32.6 51.8 43.6 2.3 44.6 31.5 40.3 22.3 43.3 37.5 29.1 27.9 (a) Find the five-number summary for these data. (b) Make a boxplot. (c) Make a histogram. (d) Write a short summary of the major features of this distribution. Do you prefer the boxplot or the histogram for these data?Fill the chi square for Cross 1 and Cross 2 from the following data in the attached image: Cross 1: Phenotypes Ratio Observed Expected (O-E)2/E Totals X2 = Cross 2: Phenotypes Ratio Observed Expected (O-E)2/E Totals X2 =A researcher found that the two groups (n=25 in each group) they tested were significantly different from each other with a t-value of 2.91, which has a corresponding p-value of p=.06. Report the findings in APA number format.
- 10.53 A study was conducted at Virginia Tech to de- termine if the "strength" of a wound from surgical inci- sion is affected by the temperature of the knife. Eight dogs were used in the experiment. "Hot" and "cold" incisions were made on the abdomen of each dog, and the strength was measured. The resulting data appear below. Strength 5120 Dog Knife Hot Cold 1 1 8200 Hot Cold 10, 000 8600 2 2 10, 000 9200 3 Hot 3 Cold Hot 10, 000 6200 4 4 ColdWith 12 degrees of freedom, the values of x/2 = x0.025 and x- a/2 = x0,975 can be found from a chi- square table. Area in Upper Tail Degrees of Freedom 0.995 0.99 0.975 0.95 0.90 0.10 0.05 0.025 0.01 0.05 12 3.074 3.571 4.404 5.226 6.304 18.549 21.026 23.337 26.217 28.300 ,2 = x0.025, move along the row for 12 degrees of freedom until reaching the column To find the value of xa/2 for an upper tail area of 0.025. Find x0.025, rounding the result to three decimal places. x0.025 Use this same process to find x0.975, rounding the result to three decimal places. x0.975 Submit Skip (you cannot come back)1) An insurance investigator has observed the people with some astrological signs tend to be safer drivers the people with other signs. Using insurance records, the investigator classified 200 people according to their astrological signs and whether or not they were involved in a car accident during the previous 12 months. The data are as follows: Libra Leo Gemini Accident 7 4 19 No Accident 73 46 1 Do the data indicate a significant relationship between sign and accidents? Compute a Chi-Square Test at the .05 level of significance.
- Give a brief analysis on the following Chi square for cross 1 (Wild type female × white eyes vestigial wings male) (1st image) and the chi square 2 (White eyes vestigial female × wild type Male)(2nd image). The chi-square value for cross1 is 7.259 and for cross 2 is 59.301.A researcher calculates a chi-square of 3.244 from a 2x4 chi-square test for independence. Which of the following should be used to determine the effect size? Select one: a. Cohen's d b. Phi-coefficient c. Cohen's w d. Cramer's V