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The lenght of time, X, to complete a standard achievement test is approximately normally distributed with a mean of 58 minutes and a stabdard deviation of 9.5 minutes. If professor yosca wants to time the exam so that it will be completed by 92% of students, how long of an exam period must be scheduled?
an electronic device dissipating 30 w has a mass of 20 gm density u03c1 2700 kgm3 a specific heat of 850 jkgk and a
for each of the following variables determine whether the variable is categorical or numerical. if the variable is
Over many years of administering tests to my statistics students I have found that the overall average of the scores on the first exam that I give each semester is 76.
assume that a sample is used to estimate a population proportion p. find the margin of error e that corresponds to the
There are three nursing positions to be filled at Lilly Hospital. Position one is the day nursing supervisor; position two is the night nursing supervisor; and position three is the nursing coordinator position.
a sample survey at a super market showed that 204 of 300 shoppers regularly use coupons. use the large- sample
The random variable x is the number of houses sold by a realtor in a single month at the Sendsom's Real Estate office. Its probability distribution is as follows.
If you did not know anything about standard deviation of population from which sample was taken, find out the 95% confidence interval for mean test score.
suppose that we are testing h0 micromicro0 vs. h1 microgtmicro0 with a sample size of n15. calculate bounds on the
Bakery is a random variable X that has an exponential distribution with mean equal to 4 tons. The cost of the flour is proportional to Y=3X+1.
Is this a one or two tailed test? (b) What is the decision rule? (c) What is the value of the test statistic? (d) What is your decision regarding H0? (e) What is the p-value? Please show me your calculations. Interpret the results.
a report from the u.s. department of justice gave the following percent increases in federal prison populations in 20
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