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saw5 [17]
3 years ago
11

What is the mean of 74, 68, 87, 92, 96, 47, 26, 87

Mathematics
2 answers:
Tasya [4]3 years ago
8 0
By adding 74,68,87,92,96,47,26,87 which gives you 577 and divide by 8 equals 72.1 hope that helps

torisob [31]3 years ago
6 0
Adding all the values gives us 577. Divide that by 8, which is the number of values there are. The mean is 72.125, round that and we get 72.
Hope I helped!
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Or equivalently:

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Step-by-step explanation:

Previous concepts

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".  

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The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".

Solution to the problem

For this case we want to test if life expectancy in country 1 is more than 10 years lower than in country 2, (alternatibe hypothesis), so then the system of hypothesis are:

Null hypothesis: \mu_1 \leq \mu_2 -10

Alternative hypothesis:\mu_1 > \mu_2 -10

Or equivalently:

Null hypothesis: \mu_1 - \mu_2 \leq 10

Alternative hypothesis:\mu_1 - \mu_2 >10

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