Answer: 1/4
Step-by-step explanation:
2/5 is 0.4 and 1/5 is 0.2 so we add them which gave us...
0.4+0.2=0.6
10 - 0.6 = 4 left over now we change 4 as a fraction which 1/4
Move over the # of decimal places as the negative exponent. 0.0907 is the correct answer!
Hope this helps, and please mark brainliest!
Answer:
B) 24/35
Step-by-step explanation:
Cos(X)= Adjacent/Hypotenuse
Cos(X) = 24/25
Therefore, option B is your answer.
Hope this answers your question!!
A. The point estimate of μ1 − μ2 is calculated using the value of x1 - x2, therefore:
μ1 − μ2 = x1 – x2 =
7.82 – 5.99
μ1 − μ2 = 1.83
B. The formula for
confidence interval is given as:
Confidence interval
= (x1 –x2) ± z σ
where z is a value
taken from the standard distribution tables at 99% confidence interval, z =
2.58
and σ is calculated
using the formula:
σ = sqrt [(σ1^2 /
n1) + (σ2^2 / n2)]
σ = sqrt [(2.35^2 /
18) + (3.17^2 / 15)]
σ = 0.988297
Going back to the
confidence interval:
Confidence interval
= 1.83 ± (2.58) (0.988297)
Confidence interval
= 1.83 ± 2.55
Confidence interval
= -0.72, 4.38
