Find evidence that the mean life is different

Reference no: EM13124095

The quality-control director at a light bulb factory wants to determine if the mean life of a large shipment of bulbs is equal to 375 hours. The population standard deviation is 100 hours. A random sample of 64 bulbs indicates the mean is 350 hours. At the .05 is there evidence that the mean life is different than 375 hours?

Reference no: EM13124095

Questions Cloud

What is annes annual after-tax rate of return : Anne's marginal income tax rate is 30 percent. She purchases a corporate bond for $10,000 and the maturity, or face value, of the bond is $10,000. If the bond pays 5 percent per year before taxes, what is Anne's annual after-tax rate of return fro..

Maximizing the profits from joint products : Which of the following is not a step needed to maximize the profits from joint products?

The process of writing and editing : Write a narrative essay, 350-500 words, which explains the process of writing and editing a research paper. should include a clearly worded statement of purpose in an appropriate place such as the end of the introduction. Identify key writing and edi..

Calculate berclair’s basic and diluted earnings per share : The options are exercisable as of September 13, 2010, for 32 million common shares at an exercise price of $56 per share. During 2011, the market price of the common shares averaged $70 per share. Calculate Berclair’s basic and diluted earnings pe..

Find evidence that the mean life is different : The population standard deviation is 100 hours. A random sample of 64 bulbs indicates the mean is 350 hours. At the .05 is there evidence that the mean life is different than 375 hours?

Analyze the need for a partnership agreement : Analyze three (3) key factors that must be discussed with the potential partners involved in forming a partnership and the likely implications of these factors on tax obligations. Based on your analysis, suggest when it is most favorable to use a ..

System of linear equations by substitution : Alice's Restaurant has a total of 205 seats. The number of seats in the non-smoking section is 73 more than twice the number of seats in the smoking section. How many seats are in each section? Please show work.

Elucidate how this strategy avoids double taxation : Elucidate how this strategy avoids double taxation, including examples of other shareholder-corporation transactions that could be used for such purpose. Also, discuss the possible pitfalls surrounding corporate payments to shareholders.

Find probability cars will be rented by normal distribution : Find the probability that in a given winter month at least 140 cars will be rented. Use the normal distribution to approximate the binomial distribution.

User Account

All Pages