Question: (5 marks) It is known, as a result of testing over many years, that the mean functional lifespan of an established dental operating lamp under normal working condition is 365 hours. A new lamp has recently come to the market, costing about 5% more, and a dental practitioner has tested 10 of them. He...

Question: An Evil Genius is trying to develop an army of flying monkeys. Don’t ask why. She would like the Monkeys to be around 250 lbs. with a wingspan of 8’. Of the 40 Type A monkeys 35 had green hair. The Evil Genius would like at least 75% of her monkeys to have green...

Question: An Evil Genius is trying to develop an army of flying monkeys. Don’t ask why. She would like the Monkeys to be around 250 lbs. with a wingspan of 8’. 33 of the type B monkeys had green hair. Does this give good evidence that a difference exists between the rate of Type A...

Question: An Evil Genius is trying to develop an army of flying monkeys. Don’t ask why. She would like the Monkeys to be around 250 lbs. with a wingspan of 8’. A sample of size 40 of Type B monkeys had a sample mean of 230 lbs. It is known that the standard deviation of...

Question: Of the 40 Type A monkeys 35 had green hair. The Evil Genius would like at least 75% of her monkeys to have green hair. Does this give good evidence that her Monkey population will have the percent of green hair that she likes?

Question: 33 of the type B monkeys had green hair. Does this give good evidence that a difference exists between the rate of Type A and B monkeys as far as green hair is concerned.

Question: A sample of size 40 of Type B monkeys had a sample mean of 230 lbs. It is known that the standard deviation of this type of monkey is 32 lbs. Does this give good that Type B monkeys have weights less than 250 lbs?

Question: Question 1: Your company boss has asked you to research locations for a future company conference. You have been asked to identify which city is cheaper for hotel rooms, Miami or Tampa. The associated data file contains samples of prices for rooms in Miami and Tampa. There is considerable historical data on hotel prices...

Question: A telemarketer is trying two different sales pitches to sell a carpet cleaning service. For Sales Pitch I, he contacted 175 people and 62 of these people bought the cleaning service. For Sales Pitch II, he contacted 154 people and 45 of these people bought the cleaning service. Does this indicate that there is...

Question: A music teacher knows from past records that 60% of students taking summer lessons play the piano. The instructor believes that this proportion may have dropped due to the popularity of wind and brass instruments. A random sample of 80 students yielded 43 piano players. Use \(\alpha \) = .05. (50 pts).