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You have graduated from college and have been working hard to get established in your field. You eventually land a perfect job where you make tons of money. You decide to step up from the 1992 Chevrolet Cavalier that you have been nurturing for a number of years into a more "comfortable" car (a.k.a. more expensive). You decide to give your nephew who just got his drivers license the Cavalier; however, it needs a little work. You do some research and find out that the mean amount of time it takes a mechanic to rebuild a Cavalier transmission is 8.4 hours and a standard deviation of 1.8 hours. Judy warned you in her statistics class that you would never be the same after taking that class. You find yourself thinking...If 40 mechanics are randomly selected, what is the probability that their mean rebuild time exceeds 8.1 hours?
a. 0.8531
b. 0.7285
c. 0.8457
d. 0.9146
Determine the first and third quartiles for Federal Savings Bank. Develop a box plot. Are there any outliers? Do the amounts follow a symmetric distribution or are they skewed? Justify your answer.
suppose that a category of world class runners are known to run a marathon 26 miles in an average of 145 minutes with a
a study of residents of a region showed 20 were smokers. the probability of death due to lung cancer given that a
a^2 + b^2=c^2 + d^2 where a,b,c,d are real numbers(describe equivalence cl). For a pair of fractions a/b and c/d define a/b ~ c/d if ab=cd(same here)
Calculate and interpret the effect size for this test and calculate and interpret any post-hoc test if necessary - Conduct all 6 steps of an independent-samples t test. Be sure to label all six steps
As sample size increases, the standard error of M _______________ .
State one referenced hypothesis including the three variables (FA as an IV, age as the covariate and RS as the DV)
In a nationwide study directed by UMUC Teaching Hospital, 780 persons with stable heart disease were treated. Half of the subjects were treated with drugs and half underwent bypass surgery.
let x be a random variable that represents the ph of arterial plasma. for healthy adults the mean of the x distribution
according to some research males have better spatial skills than do females and according to other research females
Possible combinations (1,4), (1,5), (1,6), (2,4), (2,5), (2,6), (3,4), (3,5), and (3,6) for a total of 9 possible combinations.
Construct a 95 percent confidence interval for the population proportion of positive drug tests. May you assume that this is a normal distribution? Explain why.
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