Perform test using the critical value or p-value approach

Reference no: EM13120681

"Y" size batteries produced by YYZ Corporation have had a life expectancy of 87 hours. A quality control expert wants to test whether the life expectancy of these batteries has changed from its past value of 87 hours. A sample of 36 batteries showed an average life of 88.5 hours and a standard deviation s = 8 hours.

a) Formulate the hypotheses for this problem.
b) Compute the test statistic.
c) Using = 0.05, perform the test using either the critical value approach or the p-value approach. What is your conclusion?

Reference no: EM13120681

Questions Cloud

Trust fund sold investments in securities : A private-purpose trust fund sold investments in securities having a carrying value of $23,000 for $26,000, resulting in a $3,000 gain on the change in value. If there are no trust provisions to the contrary, the gain is generally??

Find oint probability : Question about Joint probability· Calculate probabilities and joint probabilities on the events of driving to work everyday for 10 days. Identify the meaning of independent and dependent of this event

Illustrate what is the minimum time necessary for crossing : The hunter uses a small powerboat that moves at a maximum speed of 14 km/h with respect to the water. Illustrate what is the minimum time necessary for crossing?

How many ammonium ions are present : When 0.062 moles of ammonium sulfate ((NH4)2SO4) are dissolved in enough water to make 200 milliliters of solution, how many ammonium ions are present.

Perform test using the critical value or p-value approach : Compute the test statistic. Using = 0.05, perform the test using either the critical value approach or the p-value approach. What is your conclusion?

Illustrate what is general direction of airplane velocity : Illustrate what is the general direction of the airplane's velocity? east of south, north of west,north of east, or west of south?

Explain sampling without replacement : Important information about Probability : Sampling without Replacement A bag cotains 10 nickels, 5 dimes, and 3 quarters. If you draw 3 coins at random from the bag, without replacement

Pay cash dividends : Tracy co. owns 4,000 of the 10,000 outstanding shares of penn corp. common stock. during 2010, penn earns 120,000 and pays cash dividends of 40,000. if the beginning balance in the investment account was 240,000 the balance at december 31, 2010 sh..

Compute the p/e ratios for both years : After Tiger released its 2010 financial statements, the company's stock was trading at $17. After the release of its 2009 financial statements, the company's stock price was $12 per share.

User Account

All Pages