Simplify the expression -3×24+7
1 answer:
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Answer:
B. z Subscript alpha divided by 2 zα/2 = 1.96.
Step-by-step explanation:
We are given that we want to construct a confidence interval. For this, the summary statistics for randomly selected weights of newborn girls:
n = 236, = 30.3 hg, s = 7.2 hg. The confidence level is 95%.
As we can clearly see here that the population standard deviation is unknown and the sample size is also very large.
It has been stated that when the population standard deviation is unknown, we should use t-distribution but since the sample size is very large so we can use z distribution also as it is stated that at very large samples; the t-distribution corresponds to the z-distribution.
Here, = level of significance = 1 - 0.95 = 0.05 or 5%
= 0.025 or 2.5%
So, the value of in the z table is given as 1.96 with a 2.5% level of significance.
Step-by-step explanation:
Hey there!!
Just simply work with it.
We know that we have to use one point formula to find the equation of a st.line passing through point and slope is given.
So, just do accordingly.
The point is (2,-6) and slope is -1.
Where, "m" is a slope.
Put all values.
Simplify them to get answer.
Therefore the equation is y= -x-4 OR can be written as x+y+4=0.
<em><u>Hope it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>