3 1/7 x 10 answer plz
2 answers:
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Answer:
b. =8.5+1.96*3/SQRT(45), and =8.5-1.96*3/SQRT(45)
Step-by-step explanation:
Sample size (n) = 45
Sample mean (M) = 8.5 minutes
Variance (V) = 9 minutes
Z-score for a 95% confidence interval (z) = 1.96
A confidence interval is defined by the following expression:
Applying the given data:
Writing in Excel statements, the limits of the interval would be
=8.5+1.96*3/SQRT(45), and =8.5-1.96*3/SQRT(45)
Therefore, the answer is alternative b.
Answer:
<h2>x = 6 cm</h2>Step-by-step explanation:
think we hve to use trigonometry here
sin 30⁰
see the pic
sorry I am from India and we solve this type of sum with this method
