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
Answer: Elizabeth jogged 5 miles on the first day.
Step-by-step explanation:
16-6= 10
10/2 = 5
7x+9 equal 10 because it is equal to 5,
Answer:
Our required integers will be 9,11,19.
Step-by-step explanation:
Let three integers all less than 25 be x,y,z
Since we have given that
Range = 10
Mean = 13
These three integers will be
Since their range is 10 i.e.
And Mean = 13
