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Question: A volunteer ambulance service handles zero to three service calls on any given day. The probability distribution for the number of service calls is as follows:
X: the number of service calls Probability0 .151 .252 .403 .20
(i) What is the mean number of service calls per day
(ii) What is the variance of the number of service calls?
(iii) What is the standard deviation of the number of service calls?
(iv) Compute the coefficient of variation of the number of service calls.
Qualitative or ethnographic research uses open-ended questions that attempt to nuance the distinctions that quantitative research attempts do to numerically.
Test the hypothesis that there is no difference between the means of retailers (α= .05). Select a multiple comparison test, if necessary, to determine which groups differ in mean sales (α= .05).
1. for the 16 teams in the national league data is shown for the team batting averages as of august 27 2012.
Darnell lives in an area where labor is plentiful and locations for start-ups are relatively cheap. He is also confident that he can find start-up funds for a graphic arts business. As he evaluates the opportunity for his proposed venture, wh..
if a gambler rolls a dice twice to get a sum of 10, he wins $10. and if he gets a sum of three, he wins $20. The cost to play the game is $5. What is the expectation of the game?
The average cost of a renting a compact size car in a major metropolitan area is R51.74 with a standard deviation of 7.48. Assume a normal distribution.
The Weithoff company has a contract to produce 10000 garden hoses for a customer. Weithoff has 4 different machines that can produce this kind of hose.
At.01 level of significance, is proportion of seeds which germinate dependent on seed type?
A craftsperson makes stuffed animals for sale. 85% of the animals she makes are bears while the remaining 15% are rabbits. Suppose she sells 75% of her bears at craft shows but only 50% of her rabbits are sold at craft shows.
Suppose that past data are not available for developing a planning value for p; therefore, you will use p = 0.050 for the planning average.
We will test to determine if there evidence of an improvement on the final examination, at the 1% significance level. What is the alternate hypothesis?
Write out expressions for all sums of squares (in terms of the temperatures yijk m , using the dot-and-bar notation), including the (corrected) total sum of squares and error sum of squares.
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