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A Newspaper store checks out an average of u = 320 papers per day, with a standard deviation of ó=75 newspapers. Consider a sample of 30 days of operation, with x being the sample mean number of newspapers checked out per day.
1. laboratory experiment shows that the life of the average butterfly is normally distributed with a mean of 18.8 days
a rapid test for the presence in the blood of antibodies to hiv the virus that causes aids gives a positive result with
Thirty percent of the time, a sale at Food Shoppe is paid using a store-issued credit card. A sample of 18 Food Shoppe sales is obtained. Let X represent the number of sales paid for using the store-issued credit card.
Johnson is employed by the General Services Administration, and everyone knows that the GSA is the most inefficient branch of the government.
Calories in each hamburger measured. Can the reporter conclude, at α = 0.05, that the hamburgers from the two chains have a different number of Calories?
according to a survey 90 of senior executives at major u.s corporations felt that the federal budget will not be
At a board meeting of 20 businessmen, all of whom wear ties, what is the probability that:
The log is being towed by two tractors A and B. Determine the magnitudes of the two towing forces FA and FB if it is required that the resultant force have a magnitude FR = 10 kN and be directed along the x axisθ=15°
State the direction of the alternative hypothesis for the test. Type gt (greater than), ge (greater than or equal to), lt (less than), le (less than or equal to) or ne (not equal to) as appropriate in the box.
suppose x has a continuous uniform distribution over the interval -1 1.a determine the mean variance and standard
A repair shop believes that people travel more than 3500 miles between oil changes. A random sample of 8 cars getting an oil change has a mean distance of 3375 miles since having an oil change with a standard deviation of 225 miles. At alpha = 0.0..
The dependent variable was the number of positive adjectives in the paragraph (words such as good, exciting, cheerful). Based on these data, write a conclusion about primacy and recency.
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