Answer:
(0.0706, 0.1294)
Step-by-step explanation:
Confidence interval of a proportion is:
CI = p ± CV × SE
where p is the proportion,
CV is the critical value (z score or t score),
and SE is the standard error.
The sample is large enough to estimate as normal. For 95% confidence level, CV = z = 1.96.
Standard error for a proportion is:
SE = √(pq/n)
SE = √(0.1 × 0.9 / 400)
SE = 0.015
The confidence interval is:
CI = 0.1 ± (1.96)(0.015)
CI = (0.0706, 0.1294)
Round as needed.
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To solve the leg of a right triangles given the two other side, use the pythagorean theorem. which state that
C^2 = a^2 + b^2
where C is the hypotenuse of the right triangle
a and b are the legs of the right triangle
since the unknown is the other leg
b^2 = C^2 - a^2
b^2 = 18^2 - 14^2
b^2 = 128
b = 11.3 cm
Answer:
x = 20
Step-by-step explanation:
x/2 - 3 = 7
+3 =10
2 × 10 = 20
Answer:
7/7
Step-by-step explanation:
The fraction 7/7 is considered to be improper by most mathematicians. The definition of a proper fraction is that the numerator is less than the
