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marioshadowman12
10.03.2021 •
Mathematics
Can someone help please
Consider the triangle below. One of the side lengths is unknown.
Find the length of the unknown side in this triangle, rounding your answer to two decimal places (if necessary).
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Ответ:
The other side would be 15 meters.
Ответ:
b = 13.27
Step-by-step explanation:
b^2 + 7^2 = 15^2
b^2 + 49 = 225
b^2 = 176
b = sqrt(176)
b = sqrt(16 * 11)
b = 4sqrt(11)
b = 13.27
Ответ:
If we compare the p value and the significance level given for example
we see that
so we can conclude that we reject the null hypothesis, and the true mean is significantly lower than 135 so the claim not makes sense
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 determine if the true mena is at least 135, the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
We know the population deviation, so for this case is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:
z-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:
Calculate the P-value
Since is a one-side lower test the p value would be:
Conclusion
If we compare the p value and the significance level given for example
we see that
so we can conclude that we reject the null hypothesis, and the true mean is significantly lower than 135 so the claim not makes sense