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Asset income across individuals has a mean (per year) of $500 with standard deviation $400. In a simple random sample of 30 individuals, what is the probability that the total amount of asset income will exceed $18,000?
Prove that these vectors are affine independent if and only if none of them is a convex combination of the other two.
A data set includes 109 body temperatures of healthy humans for which x- bar =98.2°F and s= 0.62°F. Complete parts a and b below. A. What is the best point estimate of the mean body temperature of all healthy humans?
1. We are testing Ho: p = 0.5 vs Ha: p
Propose a sampling strategy for the supervisor.- How would you modify that strategy if the company makes both wholesale and retail sales, requiring different bookkeeping procedures?
The fill volume of cans produced by a certain machine is normally distributed with mean 12 oz and standard deviation .03 oz. [4] a. What proportion of cans contain less than 12 oz?
the high school dropout rate in the state in the state for the year 2000 was 10.8 one school district who adopted the
a study of cardiovascular risk factors compared heavy smokers light smokers and nonsmokers. both men and women were
The hardness of a piece of ceramic is proportional to the ?ring time. Assume that a rating system has been devised to rate the hardness of a ceramic piece and that this measure of hardness is a random variable that is distributed uniformly between..
A financial institution has decided to open an office in a certain commu- nity if it can be established that the median annual income of families in the community is greater than $90,000. To obtain information, a random sample of 80 families was ..
Explain why a linear model is not appropriate.- Re-express the data to straighten the scatterplot.- Create an appropriate model.
We measure the self esteem scores of a sample of statistics students, reasoning that this course may lower their self esteem relative to that of the typical college student (µ=55 and σ x =11.35) We obtain these scores:
Use this poll result to give 70%, 80%, 90% and 99% confidence intervals for the proportion of all adults who feel this way. What do your results show about the effect of changing the confidence level? (Use Excel)
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