# Question: A researcher wishes to see if the average length of

A researcher wishes to see if the average length of the major rivers in the United States is the same as the average length of the major rivers in Europe. The data (in miles) of a sample of rivers are shown. At a = 0.01, is there enough evidence to reject the claim? Assume σ1= 450 and σ2 = 474.

a. State the hypotheses and identify the claim.

b. Find the critical value(s).

c. Compute the test value.

d. Make the decision.

e. Summarize the results.

a. State the hypotheses and identify the claim.

b. Find the critical value(s).

c. Compute the test value.

d. Make the decision.

e. Summarize the results.

## Answer to relevant Questions

California and New York lead the list of average teachers’ salaries. The California yearly average is $64,421 while teachers in New York make an average annual salary of $62,332. Random samples of 45 teachers from each ...Find the 95% confidence interval for the difference of the means in Exercise 8 of this section. a. State the hypotheses and identify the claim. b. Find the critical value(s). c. Compute the test value. d. Make the ...A random sample of enrollments from medical schools that specialize in research and from those that are noted for primary care is listed. Find the 90% confidence interval for the difference in the means. a. State the ...Upright vacuum cleaners have either a hard body type or a soft body type. Shown are the weights in pounds of a sample of each type. At a 0.05, can it be concluded that the means of the weights are different? a. State the ...A composition teacher wishes to see whether a new grammar program will reduce the number of grammatical errors her students make when writing a two-page essay. The data are shown here. At α = 0.025, can it be concluded that ...Post your question