Question 6 of 6 (1 point) | Attempt 1 of Unlimited |View question in a popup 8.2 Section Exercise 9 (critical value, table) Telephone Calls A researcher knew that before cell phones, a person made on average 2.8 calls per day. He believes that the number of calls made per day today is higher. He selects a random sample of 30 individuals who use a cell phone and asks them to keep track of the number of calls that they made on a certain day. The mean was 2.9. At o = 0101, is there enough evidence to support the researcher's claim? The standard deviation for the population found by a previous study is 0.7. Assume that the vanable is normally distributed. Use the critical value method with tables. Part: 0 / 5 Part 1 of 5 olo State the hypotheses and identify the claim with the correct hypothesis. Ho- (Choose one) H1 (Choose one) This hypothesis test is a (Choose one) V test