Answer: 26.6
Step-by-step explanation:
r = 12 5(12) = 60 | s = 4 8.35(4) = 33.4 | Now subtract both total number = 33.4 - 60 = 26.6
Answer: <u>56.9</u> years to <u>63.1</u> years.
Step-by-step explanation:
Confidence interval for population mean (when population standard deviation is unknown):
, where = sample mean, n= sample size, s= sample standard deviation, = Two tailed t-value for .
Given: n= 24
degree of freedom = n- 1= 23
= 60 years
s= 7.4 years
Two tailed t-critical value for significance level of and degree of freedom 23:
A 95% confidence interval on the true mean age:
Hence, a 95% confidence interval on the true mean age. : <u>56.9</u> years to <u>63.1</u> years.
Answer:
4. 30 inches
5. 76.2 cm
6. 1024 sqaure inches
Step-by-step explanation:
4. √900 = 30 (area of a square = s²)
5. 30*2.54 = 76.2 cm
6. Each side is 2 inches longer ⇒ 30+2 = 32 inches (each side length)
area of a square = s²
32² = 1024 square inches
You know the angle sum of a square is 360 degrees.
So,
360=70+120+86+x
360=276+x
Then you solve for x by isolating it (minus 276 on both sides)
360-276=276-276+x
84=x
The last angle is 84 degrees.
Have a nice day:)