The following data represent the number of hours that a rechargeable hedge trimmer operates before a recharge is required: 1.5, 2.2 0.9, 1.3, 2.0, 1.6, 1.8, 1.5, 2.0, 1.2, and 1.7. Use the sign test to test the hypothesis at the 0.05 level of significance that this particular trimmer operates with a median of 1.8 hours before requiring a recharge.
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The following data represent the number of hours that a rechargeable hedge trimmer operates before a recharge is
required: 1.5, 2.2 0.9, 1.3, 2.0, 1.6, 1.8, 1.5, 2.0, 1.2, and 1.7. Use the sign test to test the hypothesis at the 0.05 level of
significance that this particular trimmer operates with a
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- According to the Pew research center 65% of US adults believe that the government should play a larger role in addressing climate change. A random sample (SRS) of 80 US adults found that 56 US adults believe that the government should play a larger role in addressing climate change. Does this indicate that population proportion of US adults who believe that the government should play a larger role in addressing climate change is MORE THAN 65%? Given: a= 0.05 level 1. List your oH and aH: (symbols and words) 2. State and Check the conditions for the test: 3. Use the information in question: Identify the hypotheses being tested: Find your SE and test statistic by hand: 4. Use the information in question: State your conclusion given 05.0 level, in a complete sentence, in the context of the problem. 5. Use the information in question. Find the 95% confidence interval by hand using: Given z*=1.96The shape of the mean-variance frontier that results from the combination of a riskless and arisky asset is…..:a. Is U-shaped, tilted 90 degrees clockwise.b. Is a straight line passing from the mean-variance points of the two assets.c. Is a hyperbola.d. Consists of two straight lines, each connecting one of the two assets to a risk-freeportfolioThe following partial ANOVA table is taken from an article in which the abilities of three different groups to identify a perceptual incongruity were assessed and compared. Al individuals in the experiment had been hospitalized to undergo psychiatric treatment. There were 35 individuals in the depressive group, 32 individuals in the functional "other" group, and 31 individuals in the brain-damaged group. Complete the ANOVA table and carry out the Ftest at level a- 01. (Give answers to 2 decimal places and the p-value to 3 decimal places.) Sum of Mean Square Source df Squares P-value Groups 76.61 Error Total 1127.02 Conclusion Reject the null hypothesis, there are significant differences between the means O Reject the null hypothesis, there are not significant differences between the means. O Fail to reject the null hypothesis, there are not significant differences between the means O Fail to reject the null hypothesis, there are significant differences between the means
- Based on the data of air pollution in Los Angeles in 2019, the Environmental Protection Agency (EPA) decided to publish a new stricter regulation effective in January 2020 to reduce hydrocarbon pollution. EPA wants to evaluate whether the new regulation makes significant differences in reducing pollution. EPA collects data of monthly hydrocarbon pollution level as follows: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2019 7.3 6.0 5.4 5.9 3.9 5.7 6.9 7.6 6.3 5.8 5.1 5.9 2020 5.3 6.1 5.6 5.7 3.7 4.7 6.1 7.2 6.4 5.7 4.9 5.8The Youth Risk Behavior Survey (a study of public high school students) showed that 45 of 675 girls and 103 of 621 boys had been in a physical fight on school property one or more times during the past 12 months Using 5% significance, perform an appropriate test of hypothesis that the proportion of girlsinvolved in a physical fight on school property is less than the proportion of boys involved in a physical fight on school property.Step 1: H0: ________________ Ha: ____________________ Significance level α =0.05Step 2: Check necessary data conditions and compute an appropriate test statistic:Step 3: Compute corresponding p-valueRefer to Exercise 8.S.6. Analyze these data using a Wilcoxon signed-rank test.
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- You also conducted a review of the research literature and found that similar studies examining the relationship between alcohol consumption and liver cancer found the following: Smithson et al. RR 3.3 (95% CI:1.95-5.20) Ribera et al. RR 2.1 (95% CI:1.17-3.33) Gonzalez et al. RR 2.75 (95% CI 2.26-3.45) Which one of Hill’s criteria does this illustrate? Explain.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.naness). 22.23. In a population of 1,000 students, the number of married students is 400 Out of 300 students wlo failed, 120 belonged to the married group. Using Yule's coefficient of association. find out the (Delhi Univ B.A (Econ Hons ). 1995| extent of ussociation between the attributes marriage and failure.
