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Suppose that only 25% of all drivers come to a complete stop at an intersection having flashing red lights in all directions when no other cars are visible.
a. What is the probability that, of 20 randomly chosen drivers coming to an intersection, at least 6 will come to a complete stop?
b. What is the probability that 5 cars need to come to the intersection to obtain the first complete stop.
c. What is the probability that at most 12 cars need to come to the intersection to obtain 5 complete stops. (Hint: 7 failures till the 5th success)
the pulse rates for 13 adult women were as follows. construct a 0.95 confidence interval for the mean pulse rate. give
Calculate the correlation coefficient and test for significance and calculate the Pearson product-moment correlation coefficient and test for significance
Bicycle helmet use. Table lists data from a cross-sectional survey of bicycle safety. The explanatory variable is a measure of neighbourhood socioeconomic status (variable_RFM). The response variable is "percent of bicycle riders wearing a helmet"..
Develop a mathematical programming model and solve. Discuss your results [total profits, total costs, etc].
The old equipment? based on the results, does the new equipment appears to be effective in reducing the variation of the weights?
suppose that 14 individuals take a two-day course that is supposed to improve their knowledge of web page design which
If a random sample of 8 adults is selected from the city, find the probability that exactly 3 adults respond that they enjoy using public transportation.
Compare two models. Model #1 has an r-squared of .55 and an adjusted r-squared of .50. Model #2 has an r-squared of .52 and an adjusted r-squared of .51. Given this information, what model should you use?
A study of the time spent shopping in a supermar- ket for a market basket of 20 specific items showed an approximately uniform distribution between 20 minutes and 40 minutes. What is the probability that the shopping time will be:
Mean and standard deviation are 584.6 and 34.28
it is desired to estimate the mean ldl level of healthy males in the state of ohio at the 99 confidence level to within
Construct a 95% confidence interval estimate for the population proportion of airline travelers who think that the airline fee that is most unreasonable is additional charges to redeem point/miles.
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