Which of the following number lines represents the solution to x - 5 ≥ -2?
2 answers:
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Answer:
B. 359
Step-by-step explanation:
Given that:
The margin of error (e) must be within 0.3 unit, The standard deviation (σ) = 2.9 and the the confidence level = 95% = 0.95
α = 1 =0.95 = 0.05
The z score of 0.025 corresponds to the z score of 0.0475 (0.5 - 0.025) which can be gotten from the normal probability table.
Therefore:
The formula for the margin of error is given by:
Therefore the smallest sample size (n) is 359