A large university is interested in learning about the average time it takes students to drive to campus. The university sampled 51 students and asked each to provide the amount of time they spent traveling to campus. The sample results found that the sample mean was 23.243 minutes and the sample standard deviation was 20.40 minutes. It is desired to determine if the population standard deviation exceeds 20 minutes. Calculate the test statistic for this test of hypothesis.A) x2 = 53.06 B) x2 = 58.11C) x2 = 52.02 D) x2 = 51

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general 10 months ago 9614

A manufacturer of nickel-hydrogen batteries randomly selects 100 nickel plates for test cells, cycles them a specified number of times, and determines that 14 of the plates have blistered.(a) Does this provide compelling evidence for concluding that more than 10% of all plates blister under such circumstances? State and test the appropriate hypotheses using a significance level of .05. In reaching your conclusion, what type of error might you have committed?(b) If it is really the case that 15% of all plates blister under these circumstances and a sample size 100 is used, how likely is it that the null hypothesis of part (a) will not be rejected by the 0.05 test? Answer this question for a sample size of 200.(c) How many plates would have to be tested to have \(\beta(.15)\) = 0.10 for the test of part (a)?

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general 10 months ago 3661

YOU DON'T HAVE TO ANSWER ALL OF THEM SO PLEASE HELP ME ON QUESTION A PLEASEThe fee for taxi cab is $2.50 per passenger and $0.50 for each mile. A group of friends has $22.50 for cab fare.a. Write a linear inequality to represent how many miles, y, the group can travel if there are x people in the group.b. If there are 6 people in the group, what is the furthest they can travel with their budget?c. If the group wants to travel 15 miles, what is the greatest number of passengers that can travel by taxi?

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general 10 months ago 4228

A prince picked a basketful of golden apples in the enchanted orchard. On his way home, he was stopped by a troll who guarded. The troll demanded payment of 1/2 of the apples plus two more. The prince gave him the apples and set off. A little further on, he was stopped by a second troll guard who demanded a payment of 1/2 of the apples the prince now had plus two more. The prince paid and set off again. Just before leaving the orchard, a third troll stopped him demanding 1/2 of his remaining apples plus two more. Sadly, the prince paid him and went home. He had only two golden apples left. How many apples had he picked?

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general 10 months ago 8072