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A researcher wants to compare how college graduates and college drop-outs feel about the legalization of marijuana. She asks whether they strongly support, moderately support, or don't support legalization. How should she present her data graphically?
histogram
bar graph
ogive
stem and leaf diagram
frequency polygon
The proportion of drivers who use seat belts depends on things like age, gender, ethnicity, and local law. As part of a broader study, investigators observed a random sample of 117 female Hispanic drivers in Boston; 68 of these drivers were wearin..
Known population of 1000 students to construct a 95% confidence interval for teh average SAT score. What correction factor should be used to compute the standard error?
What total size sample would be necessary if we wanted to estimate the true proportion to within ±0.08 using 90% confidence?
a high school decides to add a new course that prepares randomly selected seniors to take a certain standardized test
question 1a food research laboratory conducts a series of taste tests to compare two sauce recipes a and b. customers
Each vehicle had the gallon of gas added to the empty tank and then driven until empty. Number of miles travelled for all twelve readings are below. Use data to compute the mean and median mileages.
at a large department store the average number of years of employment for a cashier is 5.7 with a standard deviation
A membership drive in a metropolitan area resulted in 500 new members. What is the probability that 175 or more of the new members are significantly overweight?
At most, only 30 newspaper ads are possible. For every 106.7 radio ad, there must be at least two 103.1 Radio ads. Formulate the LP model to determine the number of ads in each outlet and maximize the effective audience contact.
An instructor in a Statistics course teaches in two classes: Class A and Class B. Class A has 16 students while class B has 25 students. On the same examination, although there was no significant difference in the mean grades, class A had a standa..
The new independent variable improves the predictive power of the regression model.
The researcher computes the sum of squares for groups as SSG = 40030 and the sum of squares for error as SSE = 414780. The numerical value of the ANOVA F statistic is
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