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The head of the English department wants to determine if the average number of students taking an English course differs depending upon the time of the day that the course is being offered. Is there a significant difference between the mean attendance for the classes given for 0.05 alpha?
Morning 25 26 27 26 27
Afternoon 25 24 18 20 23
Evening 27 26 24 23 25
Assume a sample of 400 American adults were taken. Show the sampling distribution of the proportion of adults who balance their checkbook at least once a month.
Standard deviation of this poll is 4%. What would be standard deviation if sample size were increased from 83 to 190?
a coin is tossed 7 times. let a be the event that the first toss is heads. let b be the event that the fifth toss is
The Greenberg public hearing meeting turned stormy. Citizens from four suburbs were gathered at city hall to try to get the city's federal funds for their own suburbs. The government recently awarded $750,000 to the city for road improvements. The..
Manufacturer of mole and gopher poison has experienced the following monthly demand for an environmentally sound pesticide poison. Using a Average method, what would the forecast have been for July?
three machines i ii and iii manufacture 30 30 and 40 respectively of the total output of certain items. of them 43 and
You choose random sample of 50 cans, and mean amount of paint per 1-gallon can is 0.995 gallon. Is there evidence that mean amount is different from 1.0 gallon (use α=0.01).
The probability is 90% that the sample percentage will be contained within what symmetrical limits of the population percentage?
Body mass index is calculated by dividing a persons weight by the square of his or her height; it is a measure of the extent to which the individual is overweight.
The yield strength of a metal bolt has a mean of 6,050 pounds with a standard deviation of 100 pounds. Twenty samples of three bolts were tested, resulting in the means shown below.
At the .01 significance level, is there a relationship between job pressure and age?
Which measures of central tendency will always have but one (1) value for a set data?
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