A popular weekly magazine asserts that fewer than 40% of households in the United States have changed their lifestyles because of environmental concerns. A recent survey of 180 households finds that 67 households have made lifestyle changes due to environmental concerns. a. Specify the competing hypothesis to test the magazine’s claim. b. Calculate the value of the test statistic and the p-value. c. At the 5% level of significance, what is the conclusion to the test?