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2 years ago

The first step in calculating the mean is to ____the numbers add group

2 answers:

4 0

The first step in calculating the mean is to add the numbers. After that you divide by the number of items in the data set. You don’t need to group the numbers to find the mean. Hope this helped!

barxatty [35]2 years ago

4 0

1º - To find a mean you'll have to add the all the data you have together.

2º - After that you'll divide your answer by the number of numbers that where summed to obtain the final answer.

Hope it helped,

Happy homework/ study/ exam!

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2 years ago

Read 2 more answers

g A test was conducted to determine if there is a difference between Canadian and American average heart rates. A group of 36 Ca

melisa1 [442]

Answer:

The test statistic | t | =4.45

Step-by-step explanation:

Step(i):-

Given that the first sample size n₁ = 36

Given that the second sample size n₂ = 34

Mean of the first sample x₁⁻ = 68.5

Mean of the second sample x₂⁻ = 70

Step(ii):-

Test statistic

$t = \frac{x^{-} _{1}-x^{-} _{2} }{\sqrt{S^{2} (\frac{1}{n_{1} }+\frac{1}{n_{2} } } )}$

$t = \frac{68.5-70}{\sqrt{2(\frac{1}{36}+\frac{1}{34} ) } }$

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The test statistic | t | = |-4.45| =4.45

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2 years ago