The article "Concrete Pressure on Formwork" (Mag. of Concrete Res., 2009: 407-417) gave the following observations on maximum concrete pressure (kN/m²): 39.1 36.2 41.8 33.2 41.8 37.3 40.2 36.7 36.0 35.2 36.7 38.9 35.8 35.2 40.1 b. Calculate an upper confidence bound with confi- dence level 95% for the population standard devia- tion of maximum pressure.
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- The article "Concrete Pressure on Formwork" (Mag. of Concrete Res., 2009: 407–417) gave the following observations on maximum concrete pressure (kN/m2): 33.2 41.8 37.3 40.2 36.7 39.1 36.2 41.8 36.0 35.2 36.7 38.9 35.8 35.2 40.1 a. Is it plausible that this sample was selected from a normal population distribution? b. Calculate an upper confidence bound with confidence level 95% for the population standard deviation of maximum pressure.only define the parameter and write the null and alternative hypotheses The production line for Glow toothpaste is designed to fill tubes with a mean weight of 6 oz.Periodically, a sample of 35 tubes will be selected in order to check the filling process. Qualityassurance procedures call for the continuation of the filling weight for the population of toothpastetubes is 6 ounces; otherwise the processes will be adjusted. Suppose a sample of 35 toothpaste tubesprovides a sample mean of 6.1 oz and standard deviation of 0.2 oz. State the parameter and both hypotheses to help determine whether the filling process should continue operating or be stopped and corrected.For 50 randomly selected speed dates, attractiveness ratings by males of their female date partnerS (x) are recorded along with the attractiveness ratings by females of their male date partners (y); the ratings range from 1 to 10. The 50 paired ratings yield *= 6.3, y = 6.1. r= - 0.283, P.value = 0.046, and g = 8.39 - 0.369x. Find the best predicted value of y (attractiveness rating by female of male) for a date in which the attractiveness rating by the male of the female is x= 4. Use a 0.01 significance level. see score The best predicted value of g when x= 4 is 7. (Round to one decimal place as needed.)
- find the minimum for the upper quartileThe data set provided below was derived from an article in the Journal of the American Medical Association entitled "A Critical Appraisal of 98.6 Degrees F, the Upper Limit of the Normal Body Temperature, and Other Legacies of Carl Reinhold August Wunderlich" (Mackowiak, Wasserman, and Levine 1992) by Allen Shoemaker. He recreated the original data set from a histogram and published the article "What's Normal? -- Temperature, Gender, and Heart Rate", Journal of Statistics Education v.4, n.2 (1996). Data Table Temp 96.2 96.7 96.9 97 97.1 97.1 97 97.2 97.3 97.4 97.4 97.4 97.5 97.5 97.4 97.6 97.6 97.6 97.8 97.8 97.8 97.8 97.8 98 98 98 98 98 98 98 98 98.2 98.1 98.3 98.2 98.3 98.2 98.4 98.3 98.5 98.5 98.4 98.4 98.6 98.4 98.7 98.7 98.6 98.6 98.6 98.6 98.8 98.7 98.8 98.9 98.9 98.9 99 99 99.1 99.1 99.1 99.3 99.3 99.5 96.4 96.7 96.8 97.3 97.1 97.3…The volume of milk in a 1 liter bottle follows a normal distribution with a mean of 1.01 liter and a standard deviation of 0.01 liter. Find the probability that a random bottle contains a volume between 0.99 liter and 1.02 liter. The lifetime of a certain model of washing machine follows a Weibull distribu- tion with scale parameter 15 years and shape parameter 3. The manufacturer wants to set the length of the guarantee on this model to make sure that at most 5% of the machines break down within the guaranteed period. What is the maximal number of whole years' guarantee he should offer?
- Past research has indicated that the average age of death row inmates is 41 years old. researcher would like to determine if the average age has changed. She randomly selects 50 death row inma s and ds their average age to be 37 years old. The hypothesis the statistician wants to test is: a. Ho: µ=37 vs_ Ha: µ ± 41. b. Ho: µ=41 vs Ha: µ< 41. Ho: u = 41 vs. H: u 41 d. Ho: µ=37 vs_Ha: µ< 41. C. 2. If a player at a casino is playing roulette and betting on red, there is a 18 / 38 or 0.474 chance that he will win on any spin of the roulette wheel. If we take a random sample of 300 players betting on red, then p is the proportion of times that the player wins. What is the mean of the sampling distribution of p? t' a. b. What is the standard deviation (os) of the sampling distribution of p? c. If repeated samples of 300 players are taken, what would be the range of the sample proportion of players victories according to the 95 part of the 68-95-99.7 rule" pts) 3. The z statistic for a…Assume that μ1 and μ2 are the averages of maximum speeds of new high-tech electric scooter types. Use the t test at significance level 0.01 to test H0: μ1 - μ2 = -16) versus Ha: μ1 - μ2 < -16 for the following data: n1 = 6, ?̅1=117.8, s1=5.06, n2 = 6, ?̅2= 128.2, and s2=5.28. (where n, ?̅, 12 and s denote the sample size, sample mean and sample standard deviation respectively.)Assume that μ1 and μ2 are the averages of maximum speeds of new high-tech electric scooter types. Use the t test at significance level 0.01 to test H0: μ1 - μ2 = -16) versus Ha: μ1 - μ2 < -16 for the following data: n1 = 6, ?̅1=117.8, s1=5.06, n2 = 6, ?̅2= 128.2, and s2=5.28. (where n, ?̅, 12 and s denote the sample size, sample mean and sample standard deviation respectively.) note: please do not use excel formula
- The table available below shows the costs per mile (in cents) for a sample of automobiles. At α=0.01, can you conclude that at least one mean cost per mile is different from the others? Let μSS, μMS, μLS, μSUV and μMV represent the mean costs per mile for small sedans, medium sedans, large sedans, SUV 4WDs, and minivans respectively. What are the hypotheses for this test?Which of the following Excel functions will find the critical value of za/2 with the confidence level of 95%? NORM.INV(1-0.025, 0, 1) 1- NORM.INV(0.025, 0, 1) 1-NORM.INV(0.05, 0, 1) T.INV(0.05,0,1) O NORM.INV(0.05, 0, 1)For 50 randomly selected speed dates, attractiveness ratings by males of their female date partners (x) are recorded along with the attractiveness ratings by females of their male date partners (y); the ratings range from 1 to 10. The 50 paired ratings yield *= 6.4. y = 6.0, r= - 0.279, P-value = 0.050, and g = 8.27 - 0.357x. Find the best predicted value of y (attractiveness rating by female of male) for a date in which the attractiveness rating by the male of the female is x=7. Use a 0.10 significance level. The best predicted value of y when x = 7 is (Round to one decimal place as needed.)