Answer:
с. A matched pairs t-interval for a mean difference.
Step-by-step explanation:
With the sample, we will have possession of the sample mean and of the sample standard deviation, which means that the t-distribution will be used.
We want to find the mean number of back problems for each sample, and estimate the difference. Since the groups are similar, with only the positions in which they work being different, we have matched pairs. So the correct answer is given by option c.
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Check the picture below.
Answer:
Hence the stone meet at a height of 20 m above the ground after 4 seconds.
Step-by-step explanation:
Hey mate hope its help you.......
