Solve using the quadratic formula: 2x^2=8x-7. There are four parts to this question labeled A-D.
1 answer:
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Answer:
The P-value is 0.0234.
Step-by-step explanation:
We are given that a statistics practitioner calculated the mean and the standard deviation from a sample of 400. They are x = 98 and s = 20.
Let = <u><em>population mean</em></u>.
So, Null Hypothesis, :
= 100 {means that the population mean is equal to 100}
Alternate Hypothesis, :
> 100 {means that the population mean is more than 100}
The test statistics that will be used here is <u>One-sample t-test statistics</u> because we don't know about population standard deviation;
T.S. = ~
where, = sample mean = 98
s = sample standard deviation = 20
n = sample size = 400
So, <u><em>the test statistics</em></u> = ~
= -2
The value of t-test statistics is -2.
Now, the P-value of the test statistics is given by;
P( < -2) = 0.0234 {using the t-table}