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Mnenie [13.5K]
3 years ago
15

True or false The opposite of a number is always positive

Mathematics
2 answers:
pychu [463]3 years ago
8 0

Answer:

Be specific about which number you are trying to say. if it's positive or negative.

Step-by-step explanation:

Positive numbers are numbers that are greater than 0. Negative numbers are numbers that are less than 0. The opposite of a positive number is negative, and the opposite of a negative number is positive.

irakobra [83]3 years ago
6 0
False because if the number was positive the opposite of that would be negative
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At the Foremost State Bank the average savings account balance in 2012 was $1900. A random sample of 45 savings account balanes
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Answer:

The calculated  |t| = |-26.517|=26.517 > 2.326 at 0.01 level of significance

Null hypothesis is rejected at 0.01 level of significance

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

Mean of the Population = 1900

Given random sample size 'n' =  45

Mean of the sample x⁻ = 1000

Standard deviation of the sample = 225

<u><em>Null Hypothesis</em></u>:-

There is no difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012.

<u><em>Alternative Hypothesis</em></u> :-

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

<u><em>Step(ii</em></u>):-

Test statistic

        t = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } }

        t = \frac{1000-1900 }{\frac{225}{\sqrt{45} } }

       t = -900 /33.54 = -26.517

      |t| = |-26.517|=26.517

Degrees of freedom

                       γ = n-1 = 45-1 =44

t₍₀.₀₁ , ₄₄₎ = 2.326

The calculated  |t| = |-26.517|=26.517 > 2.326 at 0.01 level of significance

Null hypothesis is rejected at 0.01 level of significance

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

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Step-by-step explanation:

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Step-by-step explanation:

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