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The probability of having a particular genetic disorder is 0.004. If 25 patients are tested for this disorder, what is the probability that 2 of them have this disorder?
An automobile manufacturer claims the variance in the fuel consumption for its vehicles is less than the variance of similar type vehicles from another competitor.
This second sample had an average response of 132 with a sample variance of 16. What is the pooled standard deviation for this problem?
In Gallup polls taken at different times, subjects were asked if they owned a gun, and the number of yes responses was recorded for each time period. Is this discrete or continuous? why?
In 1851 there were 25,466 nurses in Great Britain. Find the probability that a British nurse selected at random in 1851 would be 60 years or older. (My guess is The sum of the percent of nurses 60 years are older are added equaling 36% or 1967.76/2..
Suppose a firm evaluates the productivity of the three shifts of workers who work in their factory. Each shift's performance is measured based on the amount of output that is produced during the shift - day, evening, or swing shift.
In order to estimate the proportion of families who prefer female baby-sitters to male baby-sitters with an error of at most 8 percentage points and with at least 95 percent confidence, how large a sample should be taken?
If profit earned in the manufacture and sale of X units of a product is P dollars where: P = 10X - 0.001X2
Find the probability that a randomly selected bolt can be used (either immediately or after being cut). Find the probability that fewer than 15 out of 20 bolts can be used.
An article in Annals of Mathematical Statistics reports the following data on the number of borers in each of 120 groups of borers. Does the Poisson pmf provide a plausible model for the distribution of the number of borers in a group?
Gallons and standard deviation 12 gallons. On a randomly selected day, the probability that the store sells at least 154 gallons is?
Home mortgage interest rates for 30-year fixed rate loans vary throughout the country. During the summer 2000, data available from various parts of the country suggested that the standard deviation of the interest rates
Of the adults in Jefferson County, 10 percent have had CPR training. For a randomly selected group of students from this county, how large will the group have to be in order for the probability that have as a minimum one group member has had CPR t..
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