Learning Task 2.1: One-tailed or Two-tailed Test This is 5-item multiple choice involving one-tailed and two-tailed test. Directions: (1) Read the questions carefully. (2) Identify whether the given hypothesis is one- tailed or two-tailed. (3) Choose ONE if it is one-tailed and TWO if it is two-tailed test. (4) Review your answers before submitting. (5) Try up to 3 attempts only. A used car dealer says that the mean price car in the Philippines is at least P350,000. Select one: O ONE O TWO According to the survey, the average cost of visiting doctors is P500. Select one: O TWO O ONE PAG-ASA reported that the mean annual rainfall in the Philippines is at most 4,064mm. Select one: O ONE O TWO The mean age of students in a university in the previous years was 27 years old. An instructor thinks the mean age for students is older than 27. She randomly surveys 56 students and finds that the sample mean is 29 with a standard deviation of 2. Select one: O ONE O TWO The mean work week for engineers in a new company is believed to be about 40 hours. A newly hired engineer hopes that it is shorter. She asks 10 engineering friends for the lengths of their mean work weeks. Based on the results, should she count on the mean work week to be shorter than 40 hours? Select one: O TWO O ONELearning Task 2.2: Which Is Which? This is 5-item multiple choice involving t-test and z-test. Directions: (1) Read the questions carefully. (2) Identify the appropriate test statistic (t-test or ztest) to be used in each problem. (3) Choose the item that corresponds to your answer. (4) Review your answers before submitting. (5) Try up to 3 attempts only. A sample of n = 25 is selected from a normal population, 5 = 66 and a = 12. Select one: 0 Heat 0 z-test Based on the report of the school nurse. the average height of Grade 11 students has increased. Five years ago. the average height oi Grade 11 students was 170cm with standard deviation of 38cm. She took a random sample of 150 students and derived the average height of 165cm. Select one: 0 ztest O t-test It was known that the number of tickets purchased by students at the ticket window for the volleyball match of two popular universities followed a distribution that has mean of 500 and standard deviation of 8.9. Suppose that a few hours before the start of one of these matches, there are 100 eager students standing in line to purchase tickets. If there are 250 tickets remaining, what is the probability that all 100 students will be able to purchase the tickets they want? Select one: 0 ziest O t-test Knowing from a previous study that the average of athletes is 80, an athletic adviser asked how his soccer players are academically doing as compared to other student athletes After an initiative to help improve the average of student athletes. the adviser randomly selected 15 soccer players and found 85 as the average with standard deviation of 1.25. Select one: 0 t-test O z-test The CEO of a battery manufacturing company claimed that their batteries would last an average of 260 hours under normal use. A researcher randomly selected 20 batteries from the production line and tested them. The tested batteries had a mean life span of 250 hours with a standard deviation of 40 hours. Do we have enough evidence to suggest that the claim of an average of 280 hours is false? Select one: 0 t-test 0 Has