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Fourty-five percent of households say they would feel secure if they had $50,000 in savings. You randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings. Find the probability that the number that say they would feel secure is (a) exactly five, (b) more than five and (c) at most five.
In 2002, Colorado experienced a drought and many towns on the front range issued either mandatory or voluntary water restrictions on outdoor watering. The data file drought .txt contains data from five front range towns on their June 2001 and June..
What would be the correct null and alternative hypothesis for the following situation: The sample has a mean of 72.3 mph and a standard deviation of 7.4 mph. Use a 0.05 significance level to test the claim that the mean speed of all cars is greate..
A U.S. Travel Data Center survey of 1500 adults found that 42% of respondents stated that they favor historical sites as vacations. Find the 99% confidence interval of the true proportion of adults who favor visiting historical sites as vacations.
The player must pay $4 if she draws a green marble. Find the expected value in the games.
the purpose of this exam is to give you the opportunity to formulate research questions run the analyses and interpret
X(t)is a wide sense stationary process with µX = 0 and Y(t) = X(αt) where α is a nonzero constant. Find RY(τ ) in terms of RX (τ ). Is Y(t) wide sense stationary? If so, find the power spectral density SY ( f ).
Please note that for all problems in this course, the standard cut-off for a test of significance will be p
1. Let a random sample of size 17 from a normal population for which both mean μ and variance σ2 are unknown yield x = 3.12 and s2 = 1.04. Determine a 99% con?dence interval for μ.
a time study is made of a tool crib and it is found that the probability of it taking more than t minutes to fill an
a random sample of n 9 structural elements is tested for compressive strength. we know that the true mean compressive
Among nonsmokers, what percentage were pregnant after the first cycle?- Draw a bar graph that can be used to examine the relationship between smoking and how long it took to get pregnant.
suppose there are 10 drawers each containing two coins. drawers 1 and 2 contain only gold coins while in drawers 34 and
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