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Based on data from Neilsen Media Research survey 44% of 5108 randomly selected households had their televisions sets tuned to the Superbowl on game day. Identify the sample, the population, and explain if the sample is likely to be representative of the population.
A random sample of 11 health maintenance organizations (HMOs) was selected. For each HMO, the co-payment (in dollars) for a doctor's office visit was recorded. The results are as follows:
A major study examined the relationship between cause of death (heart attack, cancer, stroke, accident, etc.) and age. A good way to graphically represent the relationship is with
When investigating the distribution of a data set, which is more effective: a frequency distribution or a histogram? Why?
The scores of the GRE exam are transformed so they have a mean of 500 and standard deviation of 100. The scores are known to be normally distributed. What is the percentage of students that score below 750?
Which of the following is true about a 95% confidence interval of the mean of a given sample:
Statisticians use terms like trial, outcome and success in a particular way in reference to probability. What do each of these three terms mean in this context?
Based on the empirical data determine the following probabilities:
Bingo Hamburger Co has a chain of 12 stores in a large city. Sales figures and profits for the stores are given in the following table. Obtain a regression line for the data & predict profit for a store assuming sales of $10 million.
To guarantee that cans of soda are properly filled, some cans are sampled and the amounts measured. The overall average for the samples is 12 ounces.
A study of 20 worldwide financial institutions showed the correlation between their assets and pretax profit to be .86. At the .05 significance level
The following table gives the approximate age distribution in the United States from the 2000 census.
Many people attend work and produce little or nothing of value that is why they are terminated.
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