16. The value of a perfect positive coefficient is ________.
Select one:
a.
Equal to zero.
b.
Equal to 1.
c.
A positive number greater than 0.
d.
A positive number greater than 1
e.
None of the choices
17.When the confidence level is 90%, the Confidence coefficients is +-.
Select one:
a.
2.58
b.
1
c.
1.96
d.
1.645
18. Supposed that the z is the test statistics for hypothesis testing, calculate the value of the z for each of the following. Express your answer in 2 decimal places.
13. µ = 8, σ = 4, n = 100, x̄ = 7.2
Answer: Answer
14. µ = 25, σ = 5, n = 90, x̄ = 23.4
Answer: Answer
15. µ = 77, σ = 6, n = 150, x̄ = 78.2
Answer: Answer
16. µ = 8.5, σ = 4, n = 120, x̄ = 7.2
Answer: Answer
17. µ = 20.8, σ = 4, n = 90, x̄ = 21.2
Answer: Answer
18. µ = 31.2, σ = 3, n = 77, x̄ = 32
Answer: Answer
19. Using the following data, find the lower bound of confidence interval. Your answer must be in 3 decimal places. n=700, p̂ = 0.75, 95% confidence
20. Given the equation 3y = 21x + 9, what is the slope?
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Answer:
Lori recently purchased a square painting with a area of 2700 cm².How much wood does Lori need to make the frame?