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We have another nuisance factor that has an effect on the response variable, but the effect is not of interest. It is important that we have some experimental control with regard to the nuisance factor. If levels of nuisance variable cannot be measured / controlled, then the best we can do is to use one-way ANOVA and make sure to randomize the treatments to the experiment units. Why is such a randomization important?
A bank has the following data on the gender and marital status of 200 customers.What is the probability of finding a single female customer? Is marital status independent of gender? Explain using probabilities.
What is the probability that next years annual maximum negative return exceeds all previous negative returns? In other words, what is the probability that next years maximum negative return is a new record?
At the 0.05 level of significance, is there evidence of a significant relationship between the age groups and where people primarily get their news? If so explain the relationship.
A gender selection method is effective in helping couples have baby girls, and among 45 babies, 24 are girls. Create subjective estimates to conclude that the evidence does support the claim or that the evidence does not support the claim. Use the..
Department store accepts three types of credit cards, MasterCard, Visa, and their own store card. Charges are normally distributed. A random sample of 18 credit card purchases included 6 MasterCard
Assume that a simple random sample of a population has been selected from a population that has a normal distribution, Use the formula for X2( chi square distribution) and the chi-square distribution table
A random sample of 200 people was taken. Sixty percent of the people favor President Obama. The 95% confidence interval for the true population of people who favor Obama is?
A. Determine the regression equation. B. Determine the estimated sales if 40 contacts are made.
Using the experiment as a "pilot study", determine how many rats you should have in each group for a non-directional test. (The mean NE in the control group in example 7.9 is 444.2 ng/g and the SD is 69.6 ng/g.)
A partial computer output from a regression analysis as follows. The regression equation is:
What is a point estimate for the population mean µ?
Which of the following preference orderings, if any, could characterize his preferences? Tell me any/all that apply, and explain how you know this.
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