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The BMW Z8, Ferrari, and Lamborghini have notably low gas mileage among the two-seater cars in the table below). Find the five-number summary (median, the quartiles (first and third quartile), and the high and low extremes) of the city gas mileages. Create a histogram with a class width of 2 (see How to Make a Histogram in Excel on Blackboard) and a boxplot of the data. Are any of these cars suspected low outliers by the Interquartile Range Rule (1.5×IQR rule)? (A point is a suspected outlier if it lies more than 1.5×IQR below the first quartile (Q1) or above the third quartile (Q3).) Recalculate and redraw any plots after checking for outliers, if needed.
Gas mileage (miles per gallon) for year 2002 model two-seater cars.
a sample of 45 observations is selected from a normal population. the sample mean is 49 and the population standard
A scientist wants a confidence interval of 90% and a margin of error of +-2 for a mean of a Normal population with σ =10. What size samples should she take?
If the standard deviation is 20 pounds, and the weight gain is normally distributed, how many hogs should receive the new experimental diet?
in a survey of undergraduate library usage it was found that 76 of seniors 59 of juniors 50 of sophomores and 28 of
A group of young businesswomen wish to open a high fashion boutique in a vacant store, but only if the average income of households in the area is at least $25,00.A random sample of 9 households showed the following results:
Thompson Machine Works purchased several new, highly sophisticated machines. The production department needed some guidance with respect to qualifications needed by an operator. Four variables were listed.
The researcher was interested in how well what he/she manipulated predicts how happy subjects feel at the end of the procedure. Using the data below, calculate the regression constants and present the equation for the regression line.
a large number of people are waiting in line at espresso royale as it often happens at around noon. the barista
Without performing any calculations, will the interval increase, decrease or stay the same? Which of the values in the formula will change?
Let z represent the standard normal variable and suppose a value is randomly selected. Find each of the following probabilities by:
Apply Scheduling Theory in order to optimize a schedule of events and reduce lost productivity
in an analysis investigating the usefulness of pennies the cents portions of 82 randomly selected credit card charges
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