Answer:
d) 65.9 in < μ < 67.1 in.
Step-by-step explanation:
Given that a 99% confidence interval (in inches) for the mean height of a population is 65.7 < μ < 67.3
Mean = average of 65.7 and 67.3 =
i.e. here margin of error =
For 99% confidence interval critical value is 2.58
Hence std deviation =
For 95% confidence interval critical value is 1.96
Margin of error =
Hence confidence interval =
d) 65.9 in < μ < 67.1 in. is right
Answer:
6 turns into 2, 18 turns into 6, and 12 turns into 4.
Step-by-step explanation:
Which set of side lengths, in inches, will form a triangle? a 3.5, 7.2, and 3.0 b 10.0, 4.6, and 5.3 c 5.5, 4,9, and 10.5 d 3.2,
stealth61 [152]
Answer:
The correct answer is D
Step-by-step explanation:
To form a triangle, the sum of ANY two sides of the triangle must be greater than the length of the third side.
Looking at the first: 3.5+3.0 = 6.5 < 7.2, therefore it can't form a triangle since the sum of a pair of sides is less than the third side.
Looking at the second: 4.6 + 5.3 = 9.9 < 10.0, it's the same as the first.
Looking at the third: 5.5 + 4.9 = 10.4 < 10.5, it's the same as the first and second.
Looking at the last: 3.2 + 5.9 = 9.1 > 4.5, 3.2 + 4
5 = 7.7 > 5.9 and 5.9 + 4.5 = 10.4 > 3.2. Obviously, this fulfils the condition of a triangle. Any two sides is greater than the third, therefore the correct answer is D.
7 divided by10, 11 divided by 16, 13 divided by 19