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To test the effect of a physical fitness course on one's physical ability, the number of sit-ups that a person could do in 1 minute, both before and after the course, was recorded. Ten randomly selected participants scored as shown in the following table. Can you conclude that a significant amount of improvement took place? Use ? = 0.01 and assume normality.
(a) Find t. (Give your answer correct to two decimal places.)
In 36 randomly selected seawater samples, the mean sodium chloride concentration was 23 cubic centimeters per cubic meter and the standard deviation was 6.7 cubic centimeters per cubic meter (cc/cm).
the distance between major cracks in a highway follows an exponential distribution with a mean of 5 miles.a what is the
Explain why comparing children whose parents chose a Montessori school with children of other parents would not show whether Montessori schools perform better than other programs?
Determine a random number generator and make simulated data for not more than 25 participants (test subjects) in study using ranges of values for variables you established above.
Without using formulas, explain the meaning of (a) expected value of a random variable; (b) actuarial fairness; and (c) variance of a random variable.
If the manufacturer stocks 100 components, what is the probability that the 100 orders can be filled without reordering components?
In the regression analysis involving 25 observations following estimated regresion equation was developed. hat(Y) = 10 - 18x1+3x2+14x3 also follwoing standard errors. Test stastic for testing significance of model is?
If the standard deviation of the population is 9 hours, determine whether there has been a significant increase in battery life expectancy.
Can Mr. Rutter conclude that the mean weight of the bags is less than 50 pounds? Use the 0.1 significance level. In a brief report, tell why Mr. Rutter can use the z distribution as the test statistic.
Using a 0.01 level of significance, test the claim that the tutoring has an effect on the math scores.
the executives of electronic products company epc have to decide which of two products to introduce a or b. each has
Selecting a European Distribution Center Site for American International Automotive Industries
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