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For each characteristic, explain whether the random variable is continuous or discrete.
a. The number of left-handed individuals in a sample of 100 people.
b. Time taken to complete an exam for students in a class.
c. Vehicle speeds at a highway location.
d. The number of accidents reported last year at a highway location.
calculate the sample size needed given these factorsanova fixed effects omnibus one-waysmall effect sizealpha .05beta
(a) Find a 99% confidence interval for the average car insurance premium and interpret your result. (b) What is the margin of error when using $780 to estimate the population average car insurance premium with 99% confidence? [Hint: (U-L)/2 ]
a biologist wishes to estimate the effect of an antibiotic on the growth of a particular bacterium by examining the
in basketball a players free throws percentage ft is expressed as a number between 0 and 1 which represents the
let x be normally distributed random variable with mean u and variance s2 4.84. determine the the size of the sample
the ebit of a firm is 300 the tax rate is 35 the depreciation is 20 capital expenditures are 60 and the increase in net
To investigate he selects a sample of eight weeks and determines the number of new cars sold and the number of sales people on duty for that week. a) What are the dependent and independent variables?
Twelve cases of leukemia are reported in people living in a particular census tract over a 5-year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cancer-incidence rates?
Average of this group is 229. Population standard deviation for both groups is 6. At α = 0.01, is there difference in cholesterol levels between two groups?
If we select a crew member at random, what is the probability the crew member earns:
Give an example of a good decision that you made in the face of some uncertainty. Was the outcome lucky or unlucky? Can you give an example of a poorly made decision whose outcome was lucky?
Suppose a bookie will give you $6 for every $1 you risk if you pick the winner in 3 ballgames. For every $1 bet, you either lose $1 or gain $6. What is the bookies expected earnings per dollar wagered?
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