Answer:
CI =(0.333, 0.480)
Step-by-step explanation:
The formula for calculating the confidence interval is expressed as shown;
CI = p±Z * √p(1-p)/n±0.5/n
Z is the z-score at 90% confidence
p is the sample proportion
n is the sample size
Given n = 144, p = 0.4 and z-score at 90% CI = 1.645 (from z table)
Substituting this values;
CI = p ± 1.645*√0.4(1-0.4)/144 ±0.5/n
CI = 0.4 ± 1.645*√0.4(0.6)/144 ± 0.5/144
CI = 0.4 ±1.645 * √0.24/144 ± 0.00347
CI = 0.4 ±1.645 * 0.04087± 0.00347
CI = 0.4±0.06723±0.00347
CI =(0.333, 0.480)
Step-by-step explanation:
0.962962963 is the answer pls brainliesttt
Answer:
82 is the answer to the question
Answer:Ok, we have:
d(t) = 3*t^2 + 5*t - 2.
The first interval is:
(2, 3)
and remember that, for an interval (a,b), the difference quotient is:
D = (f(b) - f(a))/(b -a)
Then in this first interval we have:
So the average rate of change in (2,3) is 20.
now, in (2, 2.5) we have:
So here the rate of change is 9.25
And in the interval (2, 2.1) we have:
So in this interval the rate of change is 1.73
Step-by-step explanation: hope this helps luvv
Answer: x < 2
Step-by-step explanation:
Let's solve your inequality step-by-step.
6.2x+1<21−3.8x
Step 1: Simplify both sides of the inequality.
6.2x+1<−3.8x+21
Step 2: Add 3.8x to both sides.
6.2x+1+3.8x<−3.8x+21+3.8x
10x+1<21
Step 3: Subtract 1 from both sides.
10x+1−1<21−1
10x<20
Step 4: Divide both sides by 10.
10x/10 <20x/10
x < 2
