3 years ago

Fill in the space -1•6=(_)•(-1) Commutative or associative

Mathematics

1 answer:

iren [92.7K]3 years ago

6 0

Answer:

Step-by-step explanation:

I am pretty sure this is your correct answer because you just switch the order

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Answer:

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(29.4261 ,36.9739)

Step-by-step explanation:

Step :- (i)

Given sample size 'n' =15

sample of the mean x⁻ = 33.2

The standard deviation of the sample 'S' = 8.3

95% of confidence intervals

$(x^{-} - t_{\alpha } \frac{S}{\sqrt{n} } ,x^{-} + t_{\alpha }\frac{S}{\sqrt{n} } )$

Step:-(ii)

The degrees of freedom γ=n-1 = 15-1=14

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now substitute all possible values, we get

$(33.2 - 1.761\frac{8.3}{\sqrt{15} } ,33.2+ 1.761\frac{8}{\sqrt{15} } )$

After calculation , we get

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(29.4261 ,36.9739)

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the 95% confidence interval of the true mean.

(29.4261 ,36.9739)

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