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To check the Ace company's claim that the total of their 2,300 accounts receivable was $1,081,000 and that the standard deviation of the individual accounts was $ 210 the external auditor took a sample of 25 accounts which totalled $9,900.
a) If the company's report is correct, what is the probability that the average balance of an account in the sample is $403 or less?
b) If the total of the accounts receivable is only $1,000,000 (but the standard deviation was correct), what is the probability the total of the sample would be less than $9,900
test each of the individual coefficients to see if they are significant. make a plot of the residuals and comment on whether they appear to follow a normal distribution. Plot the residuals versus the fitted values. do they seem to have the same am..
trapezoid has an area of 80.75 sq. in., and its two bases are 7 and 12 inches long. find the height of the trapezoid.
Find the marginal pmfs of X and Y, explore if X and Y are independent and find the conditional pmf of Y given that 3 eggs among the six selected are cracked. What is the probability that X 1?
the aera of a rectangular wall in a classroom is 126 square feet. it lenght is 3 feet shorter than three times its width. find the length of the wall of the classroom.
A full m-ary tree has 81 leaves and height 4. (a) Give upper and lower bounds for m. (b) If the tree is also balanced, what is the value of m?
Relationship between the variables
What is the probability that the mean annual snowfall during 40 randomly picked years will be between 105 inches and 112 inches?
A business journal investigation of the performance and timing of corporate acquisitions discovered that in a random sample of 2,963 firms, 610 announced one or more acquisitions during the year 2000.
Show that == (where == is the equivalence relation defined below) is an equivalence on A, and find a (well-defined) bijection %: A== -> B, where
If Tom Bombadil's house is 24 miles east of Hobbiton and 32 miles south, what is the straight line distance.
The intersection of two open sets is compact iff it is empty. Can the intersection of an infinite collection of open sets be a non-empty compact set?
A bias coin is tossed four times. If probability of head in a single toss is 0.61, find the probability of
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