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Problem Set1. Suppose the age distribution in Sydney is as follows:
Under 18 22%18 -25 18%26-50 36%51-65 10%over 65 14%Total 100%
A researcher is conducting proportionate stratified random sampling with a sample size of 250. Approximately how many people should be sampled from each stratum?
Assume that each light bulb works independently of other light bulbs. Determine the probability that all 10 of light bulbs work?
What is the probability that it will crash at least two times in a given semester? What is the probability that it will not crash at all in a given semester?
Results were analyzed using one -way ANOVA and included SSTR =7 , 102 and SSE = 10 ,511. Are all 8 tapes equally appealing on average? Determine p value?
Write all the possible samples of size 2 and calculate the average or median of each one.
What are three lessons learned relative ANOVA and Nonparametric tests? What concepts and analytic tools will you be able to use in your workplace ?
What is the effect of child care on the security of attachment which develops between infant and caregiver. You suspect that infants in child care will be insecurely attached at 11 months after being in a child care from 2 months of age,
how many chocolate chip cookies will he need to sample to estimate the mean to within 2, what is a 99% confidence interval for the average number of chips per cookie?
A box contains four tickets, one marked with a star and the other three blank. One draw is made from this box at random.
Be sure to include information about how you would use the concept of probabilities to apply to profiles for hiring more satisfied individuals.
Management at the Kansas City Corporate office for tax prepration wants to accomplish a business objective by conduting a study of the waiting time in its tax offices in different states.
Construct a 96 percent confidence interval for the mean weight of all firefighters six months after the exercise rooms were installed.
The average age of the students in the sample was 23 with a standard deviation of 3.5: a) Formulate the hypotheses for this problem.
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