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It is estimated that 3.6% of the general population will live past their 90th birthday. In a graduating class of 733 high school seniors, find the following probabilities. (Round your answers to four decimal places.)
a) 15 or more people will live beyond their 90th birthday
b) 30 or more people will live beyond their 90th birthday
c) between 25 and 35 people will live beyond their 90th birthday
d) more than 40 people will live beyond their 90th birthday
S.D. of the sampling was 8 minutes. Shall we reject the null hypothesis of the mean >/= 28 in favor of the alternate hypothesis, mean
The five year surival rate for Caucasians for all forms increased from 37% in 1960 to 58% now. Express this change in two ways (1) as an absolute difference in terms of percentage points and (2) as a relative difference in terms of percent.
(a) Give a 95% confidence interval for the mean ARSMA score of Mexicans. (b) What assumptions does your condence interval require?
The Evergreen Fertilizer Company produces fertilizer. The company's fixed monthly cost is $25,000, and its variable cost per pound of fertilizer is $0.15.
Based on the earnings below, is there sufficient evidence to conclude, at the 99% level of confidence, that one of these divisions is more profitable than the others? Calculate the mean square for factor, and the mean square for error.
Independent random samples were taken from normal distributions of the yearly production of ships built by the International Ship Building Company under (1) a fixed-position layout and (2) a project layout.
Interpret the y-intercept of the line.
A critique is a review and commentary on a particular article or piece of research. It is not necessarily critical in the negative sense, although you may need to comment negatively on some aspects; both positive and negative aspects should be treate..
Suppose adults have basically distributed IQ scores with a mean of 100 and an SD of 15. Find P65, the 65th percentile. Use the Z table.
These 64 students will spend a combined total of more tahn $715.21? What is the probability that these 64 students will spend a combined total between $703.59 and $728.45?
Construct an appropriate control chart and comment on the process.
An economist is interested in studying the spending habits of consumers in a particular region. The population variance is known to be $1,000,000. A random sample of 50 individuals resulted in an average expense of $15,000. What is the width of th..
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