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A Math
Geometry
Common Core
B.7 Midpoint formula: find the midpoint 2YG
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Questions
answered
A line segment has the endpoints Q(6,5) and R(4, 7). Find the coordinates of its midpoint M.
Write the coordinates as decimals or integers.
M=(
OD
0
Time
elapsed
Submit
0000
14
SmartScore
out of 100
Work it out

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.