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1. Complete the histogram, and determine its mean and standard deviation. Which of the three choices in part 5 appears to be correct?
2. Look at the four histograms that your class has constructed. What can you say about the shape of the histogram as n increases? What can you say about the center of the histogram as n increases? What can you say about the spread of the histogram as n increases?
If the dean wanted a 90% confidence interval of mean annual salary of graduates with width no more than $3,000, how large a sample of graduates would she need?
question a preliminary study of hourly wages paid to unskilled employees in three metropolitan areas was conducted.
The mean SAT score in mathematics is 498. The founders of a nationwide SAT preparation course claim that graduates of the course score higher, on average, than the national mean.
According to the National Association of Homebuilders, the average life expectancies of a dishwasher and a garbage disposal are about the same: 10 years.
If 30% of endangered species are in critical danger and depend on forests for their habitat, what is the probability that an endangered species that depends on forests is in critical danger?
Calculate a 92% confidence interval for the mean density of quartz porphyry, given that 75 samples yield mean of 2.62 grams per cubic centimeter
Equation of the regression line - Evaluate the equation of the regression line and Find y' when x=47 years.
a hospital spokesperson claims that the standard deviation of the waiting times experienced by patients in its minor
Assume that the smiling time of eight-week old babies, in seconds, follows a uniform distribution between 0 and 23 seconds, inclusive. This means that any smiling time from 0 to and including 23 seconds is equally likely.
If i have 8 hookers, and 2 are wearing blue, 2 are wearing red, 3 are wearing purple, and 1 is wearing pink, what is the chance i will consummate with one wearing orange?
two semiconductor factories are being compared to see if there is a difference in the average defect rates of the chips
If I know the T-score for those who made an A on a test is 60, the z-score for those that made a B is .5, the number of students total is 200,
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