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300 bus drivers were surveyed at random and 110 of bus drivers run traffic lights on occasion. At significance level of .05, is there sufficient evidence to accept bus driver's claim?
The variance of times required to go from Point A to Point B was 150 minutes. At significance level of .05, is there sufficient information to reject train conductor's claim?
If balloon is rising vertically at a rate of 10 ft/sec, find the rate of change of distance between balloon and motorcycle ten seconds later?
35% of the orchestra students are in 8th grade. How many more orchestra students are in 7th grade than in 8th grade?
Three-fourths of balcony seats were filled. There were 27 people in balcony. How many people were seated in theater last night?
A random sample of 300 heads of households indicated that 171 owned some kind of stock. At what level of significance would you conclude that this was significant difference?
Find probability that mean tuition and fees of sample is greater than $20,000? Find probability that mean tuition and fees of sample is less than $18,000?
If man is chosen at random, find probability that his weight is greater than 180 pounds? If 100 men are randomly chosen, find probability that their mean weight is greater than 180 pounds?
Determine probability that selected person is male. Are events selected person is female and selected person has no opinion independent events? Describe.
Roll the die and record count of spots on up face: P(1) = 0, P(2) = 1/6, P(3) = 1/3, P(4) = 1/3, P(5) = 1/6, P(6) = 0.
Does data listed above comprise valid probability distribution? Describe. Find probability that randomly selected request is for one of three B's?
A1 limousine service presents service to and from Newark airport to Princeton New Jersey. Using 0.05 significance level, is there difference in variation in driving times for two routes?
Suppose answer to above question is YES. Indicate how many hypothesis tests are you going to perform? Calculate test statistic for the above hypothesis.
Ted invests $7300 in savings account which compounds interest monthly at APR of 4.5%. Who will have higher balance after 5 years? how much more will he have?
Given following piecewise function: If f continous on its domain? If not, state where f is discontinuous. Determine range.
How much can Nelson's short-term debt (notes payble) increase without pushing current ratio below 2.0? Find firm's quick ratio after Nelson has raised maximum amount of short-term funds?
Assume also that 0 p < q 1. True or false?: P(X k) P(Y k), for any k. If true, give a proof. If not true, give counterexample.
Let Z be number of times John wins. If, instead, John wanted to maximize E[Z], should he make different choice? Why or why not?
Assume that each bit is received correctly with probabaility 0.999, independently of other bits. Find probability that a 7-bit character is received in error, but error is not detected by parity check
If 100 samples of size 50 were collected from around Maine during that time, what would you expect average of sampling distribution to be?
UPS Next day air costs $42.81 for 1 pound package. This reflects increase of 4.9%. Find the cost to ship the package before the air increase?
The height is 2 greater than length and width. Find the dimensions of box if volume is 96 cubic inches and surface area is 112 inches?
On march 15, jangles sent an $8,000 partial payment. What must jangles receive? What is jangles' outstanding balance?
Express the fraction as decimal number correct to 3 decimal places. What is the decimal value from b) expressed as a percent? How does the value compare with your estimate in a)?
Brands W, X, Y, and Z that are sold at only sporting goods store in town. Find probability you buy football made by son's brand of choice and hence save Christmas?