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Five black and five white marbles are in a box. without looking, three marbles are taken from the box without replacement. what is the probability that all three are black?
How variable is the number of service calls with which Sam's department must deal?
If 30% of the athletes have been disqualified in previous terms, what is the probability that a randomly selected athlete will be disqualified during the next grading period?
Suppose that 30% of the population has black hair. In a randomly-selected group of six people, how probable is it that
Suppose we wish to estimate the true population of HSB students who own cars. We randomly sample 100 HSB students and find 20 students own a car.
Give an example representing a discrete probability distribution and a continuous probability distribution. Explain why your choice is discrete and continuous.
Which of the given properties doesn't apply to theoretical normal distribution?
Final scores averaged 66 for the treatment group; the SD was 21. For the control group, the figures were 59 and 20. What do you conclude?
A representative of the environmental protection agency (EPA) wants to select samples from 10 landfills. The director has 15 landfills from which she can collect samples.How many different samples are possible?
Construct the 90% and 99% confidence interval for population mean. Which interval is wider? If convenient, utilize technology to construct confidence intervals.
Whole Foods needs at least 1,000 units of beets. The Ames supplier can supply at least 400 units and the Zearing supplier can supply no more than 900 units. Develop constraints for these conditions.
Calculate and interpret the appropriate statistical test to determine the relationship between the following two variables. Use the five-step model of hypothesis testing to draw conclusions at the .05 level of significance
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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