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The following frequency table summarizes the distances in miles of 100 patients from a regional hospital.
Distance Frequency
0-2 30
2-4 35
4-6 20
6-8 10
8-10 5
Calculate the sample variance and standard deviation for this data (since it is a case of grouped data- use group or class midpoints in the formula in place of X values, and first calculate the sample mean).
The amount of time spent per week in studying STA 392 is of interest. A random sample of 15 students are recorded: (in hours)
Which of these potential polling places would most likely result in a reasonable approximation to the desired proportion? Why...?
A representative of a reputable financial services company has approached you as manager of a four-person group of anesthesiologists with an opportunity.
Determine the posterior predictive probability P(y > .5/ y1,.... , y120) (the probability of a dangerous mercury level) and also the extreme value P(y > 3.0/y1, . . . , y120).
a. Include a screen shot of your parent population and your two distributions of sample means here. b. How are your two distributions of sample means similar? How are they different?
The illnesses occurred over a four-day period, and county health officials began an immediate investigation.
Assuming a normal distribution and a standard deviation of 400,000 packages per day, on what proportion of the days was the volume between 3,000,000 and 3,200,000 packages?
Oligopoly is a market structure that can foster either competition or cooperation behavior and generally is correlated to higher profit rates.
suppose that the moment generating function of a randon variable x is given bymxt22-t3what is the value of the
What critical values should replace 1.645 and 2.326 in order to apply a Bonferroni correction to this multiple testing situation? What would the result of the Bonferroni correction be in terms of stars?
The spreadsheet estimates the cost of producing 10,000 to 200,000 chips per year, as seen in the table. Develop a regression model to predict Costs based on the Level of production.
In order to discover if higher SAT score, had an effect on a person's future earnings. Are these good variables and what type of statistical methods would I use to evaluate the hypotheses? Would I use a multiple regression?
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