Answer:
0.27 = 27%
0.127 = 12.7
Step-by-step explanation:
pretend the little circle at the top of a percent sign, is a ball, and to turn the percent into a decimal, the ball at the top, rolls 2 digits over to the left
25 % of a circle is the same as 25/100 and that equals 1/4 when simplified.
So to shade 1/4 of a circle, divide the circle into 4 equal pieces (by dividing the circle in half, then half the two halves). Then, you just need to shade in 1 of the 4 parts.
120 + 30 = 150
66/11 = 6
26-3x8 = 184
17-4x4 = 52
150/6 = 25
184 + 52 = 236
Answer:
(130.08, 139.92)
Step-by-step explanation:
Given that:
Mean (m) = 135
Standard deviation (σ) = 30
Sample size (n) = 100
α = 90%
The confidence interval value is obtained using the relation:
Mean ± Zcritical * (standard deviation / sqrt(n))
Zcritical at 90% = 1.64
standard deviation / sqrt(n) = 30 / sqrt(100)
= 30 / 10 = 3
Hence,
135 ± 1.64 * (3)
Lower limit : 135 - (1.64 * 3) = 130.08
Upper limit : 135 + (1.64 * 3) = 139.92
Hence,
Confidence interval = (130.08, 139.92)
