What is the Coefficient in 1/4 N + 15
1 answer:
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Answer:
The 90% confidence interval is
Step-by-step explanation:
From the question we are told that
The sample size is n = 64
The sample mean is
The standard deviation is
Given that the confidence interval is 90% then the level of significance is mathematically evaluated as
Next we obtain the critical value of from the normal distribution table , the value is
Generally the margin of error is mathematically represented as
=>
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The 90% confidence interval is mathematically represented as
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Answer:
The probability that a student has a college degree or is not married is 0.8308.
Step-by-step explanation:
The information provided is:
Total number of high school seniors (<em>N</em>) = 650.
Number of seniors with a college degree (<em>n</em> (C)) = 400.
Number of seniors who were married, (<em>n</em> (M)) = 310.
Consider the Venn diagram below.
The probability of an event, say E, is the ratio of the favorable outcomes of <em>E</em> to the total number of outcomes of the experiment.
That is,
Here,
n (E) = favorable outcomes of <em>E</em>
N = total number of outcomes of the experiment.
The probability of the union of two events is:
Compute the probability that a student has a college degree or is not married as follows:
From the Venn diagram:
n (C) = 400
n () = N - n (M) = 650 - 310 = 340
n (C ∩ ) = 200
The value of P (C ∪ ) is:
Thus, the probability that a student has a college degree or is not married is 0.8308.