The average life span of Galapagos tortoises is

The average life span of Galapagos tortoises is 111 years, with a standard deviation of 29. 5 years. You have done research on the average life spans of a random sample of 48 tortoises. 1) How likely is it that the average life span of a random sample of 48 tortoises is more than 120 years? A). 017 B). 355 C). 002 D). 380 2) How likely is it that the average life span of a random sample of 60 tortoises is less than 100 years? A). 017 B). 355 C) . 002 D). 380 3) How likely is it that one randomly selected tortoise has a life span of more than 120 years? A). 017 B). 355 C). 002 D). 380

The average life span of Galapagos tortoises is 111 years, with a standard deviation of 29. 5 years. You have done research on the average life spans of a random sample of 48 tortoises. 1) How likely is it that the average life span of a random sample of 48 tortoises is more than 120 years? A). 017 B). 355 C). 002 D). 380 NEWS FLASH!!! STAT-Test-1 works for this, too!! Use 29. 5 for σ, 111 for the mean, 48 for n and designate a right tail test. The answer is your p-value, or. 017 (still A).

The average life span of Galapagos tortoises is 111 years, with a standard deviation of 29. 5 years. You have done research on the average life spans of a random sample of 48 tortoises. 2) How likely is it that the average life span of a random sample of 60 tortoises is less than 100 years? A). 017 B). 355 C) . 002 D). 38 Using STAT-Test-1, use 29. 5 for σ, 111 for the mean, 60 for n and designate a left tail test. The answer is your p-value, or. 002 (still C).

1) An online tutoring service claims that their program improves clients’ scores on the state licensing test for becoming a real estate agent. The state licensing board is suspicious of this claim and decides to test it. They randomly select 17 people who took and failed the test and have them take the program and then retake the licensing test. The scores, both before and after the program, are listed below. Can you support the tutoring service’s claim that they improve clients’ scores? Use 0. 03 for α. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Before 75 66 72 62 75 75 65 56 74 44 69 52 68 71 72 70 60 After 79 78 64 59 82 77 74 66 71 66 77 69 60 65 72 72 66 2) The same tutoring service claims that the pass rate on the test is higher for its clients than it is for the rest of the people who take the test. A random sample of 225 clients showed that 178 passed the test. A random sample of 12000 people who took the test showed that 9587 pass the test. At α = 0. 05, can you support the tutoring service’s claim?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Before 75 66 72 62 75 75 65 56 74 44 69 52 68 71 72 70 60 After 79 78 64 59 82 77 74 66 71 66 77 69 60 65 72 72 66

1) An online tutoring service claims that their program improves clients’ scores on the state licensing test for becoming a real estate agent. The state licensing board is suspicious of this claim and decides to test it. They randomly select 17 people who took and failed the test and have them take the program and then retake the licensing test. The scores, both before and after the program, are listed below. Can you support the tutoring service’s claim that they improve clients’ scores? Use 0. 03 for α. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Before 75 66 72 62 75 75 65 56 74 44 69 52 68 71 72 70 60 After 79 78 64 59 82 77 74 66 71 66 77 69 60 65 72 72 66 Since we are talking about the differences in scores of DEPENDENT samples, we need to put these lists of numbers into L 1 and L 2 in the STAT-Edit menu. Once that has been done, highlight L 3 and type “L 1 -L 2” to put the difference of each pair into L 3. Lastly, run STAT-Test-2, use Data, designate L 3, and left-tail test. Our p-value is. 0299.

1) An online tutoring service claims that their program improves clients’ scores on the state licensing test for becoming a real estate agent. The state licensing board is suspicious of this claim and decides to test it. They randomly select 17 people who took and failed the test and have them take the program and then retake the licensing test. The scores, both before and after the program, are listed below. Can you support the tutoring service’s claim that they improve clients’ scores? Use 0. 03 for α. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Before 75 66 72 62 75 75 65 56 74 44 69 52 68 71 72 70 60 After 79 78 64 59 82 77 74 66 71 66 77 69 60 65 72 72 66 Since p < α, (just barely!!) we reject the null. This means that we support the claim, which was the alternate. At the 3% level of significance, there is enough evidence to support the tutoring service’s claim that their program improves clients’ scores on the state real estate licensing test.

Assignments: Classwork: Pages 475 -477 #3 -16 Homework: Pages 477 -478 #18 -24 Evens Just run the test to find p and make your decision.