Use the critical value approach

Reference no: EM13187279

Is there any difference between the proportion of americans who wish they were rich and the proportion of Canadians who wish they were rich ? A random sample of Americans showed that 550 wish they were rich, while a random sample of 500 Canadians showed that 225 wished they were rich.

a) find a 97.5% confidence interval for the difference between the population proportions who wish they were rich.

b) Test at the 1% level of significance, whether the two population proportions are significantly different. Formulate and test the appropriate hypotheses. Use the critical value approach.

Reference no: EM13187279

Questions Cloud

How to reduce the costs of making transactions : How does the existence of money reduce the costs of making transactions ,relative to a society based entirely on barter. English is becoming the usual language for international transactions, even if the language of neither country is English.How ..

What is the activity of the sample in bq : A Geiger-Muller well detector has a dead time of .25 ms, a geometric efficiency of 93%, and an internal eficiency of 89%. With no sample in the detector, it registers 232 counts in 1 minute.

Explain the proton-proton coupling constants for diethyl : Assume the proton-proton coupling constants for diethyl ether is 10 Hz. Draw the splitting trees for each of the multiplets in the spectrum(there are two, one triplet and one quartet).

How much alpha energy was absorbed : The efficiency of a scintillation detector is 5.1%. It absorbs alpha radiaion, producing 41,100 photons of average wavelength 4800 angstroms. How much alpha energy was absorbed?

Use the critical value approach : Is there any difference between the proportion of americans who wish they were rich and the proportion of Canadians who wish they were rich ? A random sample of Americans showed that 550 wish they were rich, while a random sample of 500 Canadians ..

Explain the economys production possibilities : There are two goods in the economy, anchovies (a fish) and bananas ( FARM product). Draw the economy's production possibilities before and after a natural disaster that lowers the banana harvest but does not affect anchovies.

Formulate and test the appropriate hypotheses : Given that the necessary assumptions are satisfied, can it be concluded, at the 2.5% level of significance, that not all mean times to relieve pain are equal ? Formulate and test the appropriate hypotheses. Use the critical value approach.

What is the measure of each angle : in triangle MNO, angle M is equal to angle N, and angle O is 5 more than three times angle N. what is the measure of each angle?

Find the percentage increase : The price of a gallon of unleaded gas has risen to today. Yesterday's price was . Find the percentage increase. Round your answer to the nearest tenth of a percent.

User Account

All Pages