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jojoangelique13
28.10.2020 •
Mathematics
PLEASE BENCH MARK Given that f(x)==x2+3x – 1 and h = f(-6), what is the value of -3h?
= 4x2+3*
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Ответ:
shush man
Step-by-step explanation:
Ответ:
Null hypothesis:
Alternative hypothesis:
Since is a left-sided test the p value would be:
If we compare the p value and the significance level given
we see that
so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the mean is significantly less than 4.00 at 5% of significance.
Step-by-step explanation:
Data given and notation
z would represent the statistic (variable of interest)
State the null and alternative hypotheses.
We need to conduct a hypothesis in order to check if the mean is less than 4.00 :
Null hypothesis:
Alternative hypothesis:
Since we don't know the population deviation, is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:
t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".
Calculate the statistic
We can replace in formula (1) the info given like this:
P-value
First we need to calculate the degrees of freedom given by:
Since is a left-sided test the p value would be:
Conclusion
If we compare the p value and the significance level given
we see that
so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the mean is significantly less than 4.00 at 5% of significance.