janeou17xn
10.06.2021 •
Mathematics
What is the integer x
so that x/9
lies between 71/7
and 113/11 ?
Solved
Show answers
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Ответ:
(A) 89 (B) 91 (C) 92 (D) 95 4.If |x−2| = p, where x < 2, then x+1 equals (A) −2 (B) 3− p (C) |2p−2| (D) 2p−2 5.A
Step-by-step explanation:
Ответ:
The 98% confidence interval for the true population proportion of all New York students who favor year round school is (0.3083, 0.4383).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of 
, we have the following confidence interval of proportions.
In which
z is the z-score that has a p-value of
.
A survey of 300 students from a New York State School District reveals that 112 favor year round school with two week vacations every ten weeks.
This means that
98% confidence level
So
, z is the value of Z that has a p-value of 
, so 
.
The lower limit of this interval is:
The upper limit of this interval is:
The 98% confidence interval for the true population proportion of all New York students who favor year round school is (0.3083, 0.4383).