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A geologist has collected 10 specimens of basaltic rock and 10 specimens of granite. The geologist instructs a laboratory assistant to randomly 12 of the specimens for analysis.
(a) What is the probability that all specimens of one of the two types of rock are selected for analysis?
(b) What is the probability that the number of granite specimen selected for analysis is within 1 standard deviation of its mean value?
the personnel department of a particular company has observed that 30 of the people the company hires are dismissed
Technical: After developing your regression model, check to make sure the technical assumptions are satisfied. Comment on any points that would concern you based on the diagnostics.
In order that the sample proportion and the population proportion not differ by more than 0.05 with 95% level of confidence, what sample size should be used?
Playbill magazine reported that the mean annual household income of it's readers is $219,155. Assume this estimate of the mean annual household is based on a sample of 91 house-holds and based on past studies,
State if the equation is separable or homogeneous:
a light fixture contains 2 light bulbs. the lifetime xi of each bulb is exponentially distributed with a mean of 200
Design a Huffman source coding scheme that can achieve lossless transmission with lessthan 90 bit/second.
we draw a ball from a bag that contains four red balls and eleven white balls. we replace the ball and draw another
assume that the data has a normal distribution and the number of observations is greater than 50. find the critical z
Calculate the correlation coefficient and determine whether it is statistically significant using a two-tailed test at the .05 level.
Find the margin of error for the values of c,s,and n and construct the confidence interval to find the estimated margin of error. Then find the sample mean.
the average magnesium concentratioin in ground water around metro city is mu65.6 parts per million ppm with a standard
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