PLEASE HELP ME OUT WITH THIS ONE!! However, it does not say what the number previously was. BUT PLEASE HELP ME!!!
2 answers:
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Answer:
12). LM = 37.1 units
13). c = 4.6 mi
Step-by-step explanation:
12). LM² = 23² + 20² - 2(23)(20)cos(119)°
LM² = 529 + 400 - 920cos(119)°
LM² = 929 - 920cos(119)°
LM =
=
= 37.08
≈ 37.1 units
13). c² = 5.4² + 3.6² - 2(5.4)(3.6)cos(58)°
c² = 29.16 + 12.96 - 38.88cos(58)°
c² = 42.12 - 38.88cos(58)°
c =
c =
c = 4.6386
c ≈ 4.6 mi
Answer:
95% confidence interval will be narrower.
Step-by-step explanation:
We are given the following in the question:
Sample size, n = 50
95% confidence interval for average alcohol content:
a) 90% confidence interval
- If we calculate a 90% confidence interval, then the confidence interval become narrower because we decreased the confidence percentage.
- This would decrease the margin of error.
- Hence, the confidence interval become narrower.