A popular weekly magazine asserts that fewer than 40% of households in the United States have changed their lifestyles because of escalating gas prices. A recent survey of 180 households finds that 67 households have made lifestyle changes due to escalating gas prices.

a. Specify the competing hypotheses to test the magazine’s claim.

b. Calculate the value of the test statistic and the corresponding p -value.

c. At a 10% level of significance, what is the conclusion? P-56