A train moves at a constant speed. The train travels 13
1 answer:
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Using the z-distribution, the test statistic is:
c) -2.63.
<h3>What are the hypothesis tested?</h3>At the null hypothesis we test if the means are equal, equivalent to a subtraction of 0, hence:
At the alternative hypothesis, we test if they are different, hence:
For each sample, they are given as follows:
.
.
For the distribution of differences, it is given by:
.
The test statistic is given by:
In which is the value tested at the null hypothesis.
Hence:
z = -2.63.
More can be learned about the z-distribution at brainly.com/question/13873630
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The explicit formula of the sequence is given by a_n = -4n(n-1).
We have to find the first five terms of the sequence.
The first term:
The second term:
The third sum:
The fourth term:
The fifth term:
Thus, option D is correct.