Q. 14 Distinguish between non-randomised and randomised test.
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A: We have given that the statement on Randomised block design.
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Q: 81 100 88 85 84 100 91 98 80 Test B 93 73 83 98 77 85 85 84 90 (a) Is there significant difference…
A: Test A : 81,100,88,85,84,100,91,98,80 Test B : 93,73,83,98,77,85,85,84,90
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Q: The Rip-off Vending Machine Company operates coffee vending machines in office buildings. The No. of…
A: We have given that Sample size n = 9 Level of significance =?=0.05
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Q: 16) On what situations should the paired samples t test be used rather than the independent samples…
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- Self-reported injuries among left- and right-handed people were compared i n a survey of 1896 college students i n British Columbia, Canada. Of the 18 O left- handed students, 93 reported at least one injury. In the same period, 619 of the 1716 right-handed students repor ted at least one injury. Test to compar e the proportions of injured students, left- versus right-handed; state clearly your null and alternative hypotheses and choice of test size. Treatment 707 740 745 652 649 676 699 696 712 708 749 690 Control 669 650 651 627 656 642 698What are some of the advantages of the One-Way ANOVA compares to the Two-Way ANOVA? Provide an examole of when the Two-Way ANOVA woild he appropriate test to conduct2
- A private and a public university are located in the same city. For the private university, 1042 alumni were surveyed and 655 said that they attended at least one class reunion. For the public university, 804 out of 1317 sampled alumni claimed they have attended at least one class reunion. Is the difference in the sample proportions statistically significant? (Use α=0.05) a) Reject the null hypothesis which states there is no difference in the proportion of alumni that attended at least one class reunion in favor of the alternate which states there is a difference in the proportions. b) Fail to reject the null hypothesis. There is not enough evidence to conclude that there is a difference in the proportions. c) There is not enough information to make a conclusion.If an ANOVA has dfbetween = 3, then k = 3. True or False2
- Identify the nonparametric alternative to the randomized block ANOVA.A researcher wants to use the most powerful test Choose one One way anova or two way chi or Mann WhitneyThe worker on examining his 20 rainfall sample points concluded that it is more than likely to rain on this May 1st. Describe two or three statistical steps he took to arrive at this conclusion.
- A study was done to provide data on sleep deprivation rates of Californians and Oregonians. The percent of California residents who reported insufficient rest or sleep during each of the preceding 30 days is 8.0%, while this percent is 8.8% for Oregon residents. These data are based on simple random samples of 11,545 California and 4,691 Oregon residents. a) Conduct a hypothesis test to determine if these data provide strong evidence the rate of sleep deprivation is different for the two states. Use California as Group A and Oregon as Group B. Round your test statistic to 2 decimal places and your p-value to 4 decimal places. Test statistic: p-value: Conclusion:1. What are the differences between one-way ANOVA and the Kruskal–Wallis test?2. Which test would you use in the real world population studies and why?40. We will take a random sample of 30 vehicles of a certain make and model and measure the fuel efficiency in miles per gallon (mpg) of each of them. We will conduct a hypothesis test at the 10% level of significance to determine whether there is evidence that the true mean fuel efficiency of all cars of this make and model differs from 32 mpg. What is the probability of failing to reject H, if the true mean is in fact 32 mpg? (A) 0.10 (B) 0.95 (C) 0.05 (D) 0.90 (E) 0.20