Questions from Statistical Techniques

Q: A recent Gallup study (http://www.gallup.com

A recent Gallup study (http://www.gallup.com/poll/175286/hour-workweek-actually-longerseven-hours.aspx) found the typical American works an average of 46.7 hour per week. The study did not report the...

Q: According to sales information in the first quarter of 2016, 2

According to sales information in the first quarter of 2016, 2.7% of new vehicles sold in the United States were hybrids. This is down from 3.3% for the same period a year earlier. An analyst’s review...

Q: We want to estimate the population mean within 5, with a

We want to estimate the population mean within 5, with a 99% level of confidence. The population standard deviation is estimated to be 15. How large a sample is required?

Q: An investor purchased 100 shares of Fifth Third Bank stock and 100

An investor purchased 100 shares of Fifth Third Bank stock and 100 shares of Santee Electric Cooperative stock. The probability the bank stock will appreciate over a year is .70. The probability the e...

Q: A carbon monoxide detector in the Wheelock household activates once every 200

A carbon monoxide detector in the Wheelock household activates once every 200 days on average. Assume this activation follows the exponential distribution. What is the probability that: a. There will...

Q: Two boxes of men’s Old Navy shirts were received from the factory

Two boxes of men’s Old Navy shirts were received from the factory. Box 1 contained 25 mesh polo shirts and 15 Super-T shirts. Box 2 contained 30 mesh polo shirts and 10 Super-T shirts. One of the boxe...

Q: A sample of 2,000 licensed drivers revealed the following number

A sample of 2,000 licensed drivers revealed the following number of speeding violations. Number of Violations _______ Number of Drivers 0 …………………………………………………………….. 1,910 1 ………………………………….…………………………….....

Q: The estimate of the population proportion should be within plus or minus

The estimate of the population proportion should be within plus or minus .10, with a 99% level of confidence. The best estimate of the population proportion is .45. How large a sample is required?

Q: For the daily lottery game in Illinois, participants select three numbers

For the daily lottery game in Illinois, participants select three numbers between 0 and 9. A number cannot be selected more than once, so a winning ticket could be, say, 307 but not 337. Purchasing on...

Q: A processor of carrots cuts the green top off each carrot,

A processor of carrots cuts the green top off each carrot, washes the carrots, and inserts six to a package. Twenty packages are inserted in a box for shipment. Each box of carrots should weigh 20.4 p...