# Question: To complete the poll reported in Exercise 9 Pew Research

To complete the poll reported in Exercise 9, Pew Research surveyed respondents by telephone, drawing a random sample of landlines and another random sample of cell phones. For those numbers that were valid, they report the following:

Are the results they find independent of the telephone type?

a) Under the usual null hypothesis, what are the expected values?

b) Compute the x2 statistic.

c) How many degrees of freedom does it have?

d) What do you conclude?

Are the results they find independent of the telephone type?

a) Under the usual null hypothesis, what are the expected values?

b) Compute the x2 statistic.

c) How many degrees of freedom does it have?

d) What do you conclude?

## Relevant Questions

For each of the following situations, state whether you’d use a chi-square goodness-of-fit test, chisquare test of homogeneity, chi-square test of independence, or some other statistical test. a) A brokerage firm wants to ...At a major credit card bank, the percentages of people who historically apply for the Silver, Gold, and Platinum cards are 60%, 30%, and 10%, respectively. In a recent sample of customers responding to a promotion, of 200 ...In March and April of 2011, the Pew Research Center asked 2142 U.S. adults and 1055 college presidents whether they would “rate the job the higher education system is doing in providing value for the money spent by ...In early 2012, the proportion of mortgages that were “under water”—a negative equity position in which the homeowner owes more than the value of the home—was highest in Nevada and Arizona ...In some situations where the expected counts are too small, as in Exercise 38, we can complete an analysis anyway. We can often proceed after combining cells in some way that makes sense and also produces a table in which ...Post your question