Telephone Calls A researcher knew that before cell phones, a person made on average 3.1 calls per day. He believes that the number of calls made per day today is higher. He selects a random sample of 26 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 3.3. At a = 0.10, is there enough evidence to support the researcher's claim? The standard deviation for the population found by a previous study is 0.6. Assume that the variable is normally distributed. Use the critical value method with tables. Part 1 of 5 State the hypotheses and identify the claim with the correct hypothesis. Hμ = 3.1 not claim H₁>3.1 claim This hypothesis test is a one-tailed ▼test. Part: 1/5 Part 2 of 5 ▼ X ▼ Find the critical value(s). Round the answer to two decimal places. If there is more than one critical value, separate them with commas. Critical value(s): + S

Q: (-14) + (–7)

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