Questions from Business Statistics

Q: The display shows the average drive distance (in yards) for

The display shows the average drive distance (in yards) for 199 professional golfers during a week on the men PGA tour in 2015. 1. Describe this distribution. 2. Approximately what proportion of profe...

Q: Should you generate electricity with your own personal wind turbine? That

Should you generate electricity with your own personal wind turbine? That depends on whether you have enough wind on your site. To produce enough energy, your site should have an annual average wind s...

Q: Write the null and alternative hypotheses you would use to test each

Write the null and alternative hypotheses you would use to test each of the following situations: 1. A governor is concerned about his negatives the percentage of state residents who express disapprov...

Q: Write the null and alternative hypotheses you would use to test each

Write the null and alternative hypotheses you would use to test each situation. 1. In the 1950s, only about 40% of high school graduates went on to college. Has the percentage changed? 2. Twenty perce...

Q: After the political ad campaign described in Exercise 15, part a

After the political ad campaign described in Exercise 15, part a, pollsters check the governor negatives. They test the hypothesis that the ads produced no change against the alternative that the nega...

Q: The seller of a loaded die claims that it will favor the

The seller of a loaded die claims that it will favor the outcome 6. We don’t believe that claim, and roll the die 200 times to test an appropriate hypothesis. Our P-value turns out to be 0.03. Which c...

Q: A company old antacid formula provided relief for 70% of the

A company old antacid formula provided relief for 70% of the people who used it. The company tests a new formula to see if it is better and gets a P-value of 0.27. Is it reasonable to conclude that th...

Q: A survey investigating whether the proportion of today high school seniors who

A survey investigating whether the proportion of today high school seniors who own their own cars is higher than it was a decade ago finds a P-value of 0.017. Is it reasonable to conclude that more hi...

Q: A friend of yours claims that when he tosses a coin he

A friend of yours claims that when he tosses a coin he can control the outcome. You are skeptical and want him to prove it. He tosses the coin, and you call heads; it tails. You try again and lose aga...

Q: Someone hands you a box of a dozen chocolate-covered candies

Someone hands you a box of a dozen chocolate-covered candies, telling you that half are vanilla creams and the other half peanut butter. You pick candies at random and discover the first three you eat...