Identify and interpret the p-value for the test

Reference no: EM13974967

1. It has been claimed that flattening ("rolling") the barrel of a graphite baseball bat can stretch the fibers and result in a pitched baseball being returned faster than with a regulation bat. This was a controversial topic dur- ing the 2009 baseball College World Series. Assume that data file XR11013 describes the results of a controlled test measuring the return speeds of balls pitched to a flattened bat and a regulation bat, respectively. Based on these sample results, and using a suitable one-tail test at the 0.05 level, was the mean return speed for the flattened bat significantly greater than for the regulation bat? Identify and interpret the p-value for the test. Source: Andy Gardiner, "NCAA on Guard for ‘Rolled' Bats," USA Today, June 17, 2009, p. 8C.

2. Comparing the number of Facebook "friends" for men and women, observers have speculated about whether the mean number of friends could be the same for each group. Assume that data file XR11014 lists the number of Facebook friends for independent samples of male and female Facebook users. Based on the results of a two-tail test at the 0.05 level, comment on whether the difference between the sample means could have simply occurred by chance. Identify and interpret the p-value for the test.

Reference no: EM13974967

Questions Cloud

What is the opportunity cost of increasing the annual output : What is the opportunity cost of increasing the annual output of corn from 800 to 1000 pounds? What is the opportunity cost of increasing the annual output of corn from 200 to 400 pounds?

Consistent with the findings of the hypothesis test : What is the most accurate statement that could be made about the p-value for this test? Construct and interpret the 90% confidence interval for the difference between the population means. Is the hypothesized difference (0.00) within the interval..

How long will it take for it to travel : If a speed radar captures a car traveling at 175 meters per second how long will it take for it to travel 15 meters

Trade and economic growth : Explain the difference between comparative advantage and absolute advantage. Trade has been ubiquitous throughout history. Why? What role can trade play in the growth of an economy.

Identify and interpret the p-value for the test : Identify and interpret the p-value for the test. Source: Andy Gardiner, "NCAA on Guard for ‘Rolled' Bats," USA Today, June 17, 2009, p. 8C.

What government expenditures should be excluded from gdp : Are all expenditures of a government included in the calculation of GDP for that nation? Why or why not? If not, what government expenditures should be excluded from GDP?

GDP Effect of Fiscal and Monetary Policy : GDP depends partly upon Investment and consumption spending. If the economy is in a persistent recession what can the Congress and Administration do to improve the GDP? What can the Federal Reserve do to improve the economy is Consumption and Investm..

Would the sale of cotton from a cotton mill to the shirt : Would the sale of cotton from a cotton mill to the shirt manufacturer be included in the calculation of GDP? Why or why not?

Recorded on the banks balance sheet : Dave Macy decides to sell his gold jewelry and deposits the cash at his local bank. How would this be recorded on the bank’s balance sheet?

User Account

All Pages