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With reference to Example 5, test the null hypothesis σ1 - σ2 = 0 against the alternative hypothesis σ1 - σ2 > 0 at the 0.05 level of significance.
Example
In the comparison of two kinds of paint, a consumer testing service finds that four 1-gallon cans of one brand cover on the average 546 square feet with a standard deviation of 31 square feet, whereas four 1-gallon cans of another brand cover on the average 492 square feet with a standard deviation of 26 square feet. Assuming that the two populations sampled are normal and have equal variances, test the null hypothesis μ1 - μ2 = 0 against the alternative hypothesis μ1 - μ2 > 0 at the 0.05 level of significance.
Is the transportation model the example of decision making under certainty or decision making under uncertainty? Provide the real-world example illustrtating why it is certainty or uncertainty.
The following 4 questions (Q1 to Q4) are based on the following information:You and your friends have decided to go to The Kentucky Derby. There are 12 horses inthe race. How many ways can the horses come in first, second, or third?
a test has a mean of 104 and a standard deviation of 16. we want to be 98 certain that we are within 4 points of the
Compute the probability that the receiver makes an incorrect decision? What happens if the sender only adds two parity bits a4 and a5?
in a survey of drinking beer in young people 400 boys and 500 girls were asked whether they had ever drunk beer 302 of
Unexposed women comprising a contro group. at the 0.01 level of significance, was the incidence of cancer greater in the DES users?
Increasing the confidence-interval level from .95 to .99
Tthe job is normally distributed and has a mean time of 30 minutes with a standard deviation of 8 minutes. How much time should the employer allow employees to finish the job?
q1. a researcher hypothesizes that individuals who listen to classical music will score differently from the general
Compute the probability of receiving three calls in a 5-minute interval of time. Compute the probability of receiving exactly 10 calls in 15 minutes.
a contractor susan meyer has to haul gravel to three building sites. she can purchase as much as 18 tons at a gravel
A farmer has 40m of fencing with which to enclose a rectangular pen.Given that the pen is x m wide - show that it's area is (20x - x^2)m^2 and deduce that the maximum area that he can enclose (Answer given 100m^2).
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