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Many people believe that the average number of Facebook friends is 135. The population standard deviation is 36.1. A random sample of 30 high school students in a particular county revealed that the average number of Facebook friends was 146. At a=0.01, is there sufficient evidence to conclude that the mean number of friends is greater than 1357 Part 1 of 5 State the hypotheses and Identify the calm with the correct hypothesis. Ho: = 135 not claim H:> 135 claim This hypotheses test is a one-talled V test. Part: 1/5 Part 2 of 5 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): 1 OD
Soft Drink Consumption A researcher claims that the average yearly consumption of soft drinks per person is 52 gallons. In a sample of 54 randomly selected people, the mean of the yearly consumption was 53.9 gallons. The standard deviation of the population is 3.5 gallons. On the basis of the P-value, is the researcher's claim valid at a=0.107 Part: 0/5 Part 1 of 5 State the hypotheses and identify the claim. HO: H, (Choose one) (Choose one) The hypothesis test is a (Choose one) 7 test.
Copy Machine Use A store manager hypothesizes that the average number of pages a person copies on the store's copy machine is less than 40. A sample of 42 customers' orders is selected. At a=0.05, is there enough evidence to support the clal using the P-value method? Assume o = 30.9. 61 24 113 9 72 36 80 17 3 2 70 37 9 17 21 5 51 85 3 2 1 58 122 2 82 21 42 9 49 2 15 1 43 27 6 61 36 5 3 4 2 Send data to Excel Part: 0/5 Part 1 of 5 State the hypotheses and Identify the claim. Ho: H: (Choose one) (Choose one) The hypothesis test is a (Choose one) test.
Sick Days in Bed A researcher wishes to see if the average number of sick days a worker takes per year is greater than 5. A random sample of 28 workers at a large department store had a mean of 5.6. The standard deviation of the population is 1.2. Is there enough evidence to support the researcher's claim at a-0.017 Assume that the variable is normally distributed. Use the P-value method with tables. Part: 0/5 Part 1 of 5 State the hypotheses and identify the claim. H: (Choose one) H: (Choose one) This hypothesis test is a (Choose one) v test.
Telephone Calls A researcher knew that before cell phones, a person made on average 2.5 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 2.7. At a=0.1, is there enough evidence to support the researcher's claim? The standard deviation for the population found by a previous study is 0.9. Assume that the variable is normally distributed. Use the P-value method with tables. Part: 0/5 Part 1 of 5 State the hypotheses and identify the claim. + H: H: (Choose one) (Choose one) The hypothesis test is a (Choose one) V test.