In a random sample of 250 students, 150 were in favor of longer hours at the school library. At 98% level of confidence, what is
1 answer:
0.072 is the margin of error.
<h3>What is standard error?</h3>The standard error (SE) of a statistic is the standard deviation of its sampling distribution or an estimate of that standard deviation.
According to the question,
In a random sample of 250 students,
p= 0.98 (or 98%) were in favor of longer hours at the school library.
The standard error of p(the sample proportion) is (approximately)
The standard error of p =
p = 0.98
1 - p = 1 - 0.98 = 0.02
Here,
n = 250
The standard error of p =
The standard error of p ≈ 0.072
Therefore,
The margin of error is 0.072.
Learn more about is standard error here:
#SPJ1
You might be interested in
Answer:
Step-by-step explanation:
Aromatic amine is generally less nucleophilic than aliphatic amine because of the aromatic delocalisation of the lone pair. Ketones are also less reactive compared to aldehyde and Reaction between aromatic amine and aromatic ketone is possible leading to the formation of Schiff's base in aqeous ethanoic solution.
We want to multiply the monomial by the monomial
.
Remember that to multiply monomials we need to use the laws of exponents; in this case, the law for multiplying powers with the same base. The rule says that, when you multiply powers of the same base, you just need to add the exponents: ,
. Also, is worth pointing out that the exponent of a variable with no exponent is 1:
.
Remember that we also need to multiply their coefficients , which are the numbers that multiply the variables; again, variables with no numbers have a coefficient of 1, so . Multiply coefficients is easy, you just need to multiply them as you usually do with everyday numbers.
Let's apply all of that to our multiplication:
We can conclude that 2x times x squared is 2x cubed.