Your answerProblem 4In a controlled laboratory experiment, scientists at the Caraga stateUniversity discovered that 228 of a certain strain of rats subjectedto a 28% coffee bean diet and then force-fed a powerful cancer-causingchemical later developed cancerous tumors. Would we have reason tobelieve that the proportion of rats developing tumors when subjectedto this diet has increased if the experiment were repeated and 21 of48 rats developed tumors? Use a 0.1 level of significance.Your answer

The scientists of Caraga State university discovered that 22% of a certain strain of rats subjected…

Answered: Problem 4 In a controlled laboratory…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In a population-based cohort study, an entire community was interviewed regarding smoking habits and then followed for one year. Upon ascertainment of all lung cancer deaths, the investigator obtained the following data: Number of Individuals Lung Cancer Deaths Smokers 24,500 15 Nonsmokers 10,500 2 Calculate the risk difference per 100,000 per year. Round to the tenth decima
Acne is a common skin disease that affects most adolescents and can continue into adulthood. A study compared the effectiveness of three acne treatments and a placebo, all in gel form, applied twice daily for 12 weeks. The study's 517 teenage volunteers were randomly assigned to one of the four treatments. Success was assessed as clear or almost clear skin at the end of the 12 week period. The results of the study can be seen in the table below. Using the appropriate statistical test, determine if there is significant evidence that the four treatments perform differently. If so, how do they compare.
QUESTION 23 It was found that in a study of air-bag effectiveness 900 crashes of midsize cars equipped with air bags, 70 of the crashes resulted in hospitalization of the drivers. We want to test the claim that the air-bag hospitalization rate is more that the 6.8% rate for crashes of midsize cars equipped with automatic safetly belts. At 0.05 significance level we conclude that Othere is sufficient evidence to support the claim that for crashes of midsize cars, the air-bag hospitalization rate exeeds the 6.8% rate for automatic safetly belts. there is no sufficient evidence to support the claim that for crashes of midsize cars, the air-bag hospitalization rate exceeds the 6.8% rate for automatic safetly belts. Othere is sufficient evidence to support the claim that for crashes of midsize cars, the air-bag hospitalization rate is at least 6.8% rate for automatic safetly belts. there is no sufficient evidence to support the claim that for crashes of midsize cars, the air-bag…
A two-way ANOVA experiment with interaction was conducted. Factor A had three levels (columns), factor B had five levels (rows), and six observations were obtained for each combination. Assume normality in the underlying populations. The results include the following sum of squares terms: SST=1542 SSA= 1042 SSB = 358 SSAB = 39 a. Construct an ANOVA table. (Round "MS" to 4 decimal places and "F" to 3 decimal places.) ANOVA Source of Variation Rows Columns Interaction Error Total SS 0 df Answer is not complete. 0 MS F p- value 0.000 0.000 0.002
QUESTION 13 "Compared to an independent-measures design, a repeated-measures study is more likely to find a statistically significant effect because it reduces the contribution of variance due to O time-related factors. O order effects. the effect of the treatment. O individual differences.
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Question 2 There is a claim that drink driving has been very common in high ways. The Highway Police randomly caught 300 drivers for breath alcohol test and found that 14% of drivers have breath alcohol over the legal limit. At 4% level of significance, use the p-value approach to test the hypothesis that the percentage of drivers who are drink driving is more than 10%.
Dr. Maddan's eye drops are supposed to cause significant reduction is eye redness. The following table shows the results of a recent study where a random sample of individuals took part in a placebo controlled study. No Reduction in Redness Reduction in Redness Total Eye Drops 120 220 340 No Eye Drops Total 120 140 260 240 360 600 With 5% level of significance, determine if eye redness reduction is dependent upon taking the eye drops. Provide, a. the Chi-square statistic. b. the critical value or the p-value. c. Your decision on whether or not to reject Ho.
6
Plz answer both questions 01) 3. In a larger-scale replication study, 60 subjects were randomly assigned to one of 3 treatment conditions (0 ml., 5 ml., or 10 ml. of melatonin). After treatment, the total sum of squares was found to be 6504.75. In addition, 32% of the variance between the groups' measured depression could be accounted for by the different dosages of melatonin they had been administered. Does this study show significant differences between the groups' mean depression scores (α ≤ .025) 4. Forty eight subjects were randomly assigned to one of 4 treatment conditions in a study of different methods of coping with statistics exam anxiety. After the experiment, 12 subjects remained in group 1, 8 in group 2, 10 in group 3, and 10 in group 4. The mean anxiety score of group 1 was found to be 5.5 points higher than the mean of group 2, 3.5 points higher than the mean of group 3, 5.3 points higher than the mean of group 4, and 3.3 points higher than the grand mean.…

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