bryan519688
15.12.2020 •
Mathematics
ducational Television In a random sample of people, said that they watched educational television. Find the confidence interval of the true proportion of people who watched educational television. Round the answers to at least three decimal places.
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Ответ:
Complete Question
Educational Television In a random sample of 200 people, 159 said that they watched educational television. Find the 90% confidence interval of the true proportion of people who watched educational television. Round the answers to at least three decimal places.
The 90% confidence interval is
Step-by-step explanation:
From the question we are told that
The sample size is n = 200
The number of people that watched the educational television is
Generally the sample proportion is mathematically represented as
=>
From the question we are told the confidence level is 90% , hence the level of significance is
=>
Generally from the normal distribution table the critical value of is
Generally the margin of error is mathematically represented as
=>
=>
Generally 95% confidence interval is mathematically represented as
=>
=>
Ответ:
x^2 − 5x − 2 = 0.
a = 1
b = -5
c = -2
x = (5 +- sqrt(25 +8)) / 2
x1 = 5.3723
x2 = -0.37228
Step-by-step explanation: