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We draw a random sample of size 36 from a population with the standard deviation 3.5. If the sample mean is 27, what is a 95% confidence interval for the population mean?
For each of the following quantitative variables, explain whether the variable is continuous or not. Number of classes a student misses in a week.
He can award a bonus to 20 percent of the representatives. What is the cutoff point between those who earn a bonus and those who do not?
A data sample is sorted into a 3 × 2 contingency table based on two factors, one of which has three levels and the other of which has two levels.
If someone of your gender is randomly selected what is the probability that the selected person would be shorter than you are?
If the weekly average expenditure of all households is $53,000 but an expert argues that the weekly expenditure is more than $53,000, test his claim at a 5% level of significance and interpret your results.
For this set of numbers: 40 40 45 43 48 45 40 40 40 40 40 40 40 48 43 40 43 40 40 45 what is the mean, standard deviation.
in a poll taken in march of 2007 gallup asked 1006 national adults whether they were baseball fans. 36 said they
Discuss potential threats to internal validity posed and Describe two ways to deal with the threats
Draw a tree diagram representing this experiment. Use this tree diagram to find the probabilities below.
I conduct an experiment doing fixed-level testing with ε = .05; I know that for a given set of alternatives my power will be .85. True or False ?
a light bulb company is studying defects in their lightbulbs 4 of the bulbs have defects in the glass but not the coil
An alcohol awareness task force at Big-Ten university sampled 20 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying
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