2 years ago

Jan age is 3 less than the twice triss agethe sum of thier ages is 30

Mathematics

1 answer:

tresset_1 [31]2 years ago

3 0

Jan is 19, Triss is 11.

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A random sampling of a company's monthly operating expenses for n=36 months produced a sample mean of $5474 and a stan-dard devi

lilavasa [31]

Answer with explanation:

Mean of the sample(m) = $ 5474

Standard deviation of the sample (S)=764

Number of observation(n)=36

$Z_{90 \text{Percent}}=Z_{0.09}=0.5359$

$z_{score}=\frac{\Bar x-\mu}{\frac{S}{\sqrt{n}}}\\\\0.5359=\frac{5474- \mu}{\frac{764}{\sqrt{36}}}\\\\0.5359=\frac{5474- \mu}{\frac{764}{6}}\\\\764 \times 0.5359=6 \times (5474- \mu)\\\\409.4276=32844-6 \mu\\\\6 \mu=32844 -409.4276\\\\ 6 \mu=32434.5724\\\\ \mu=\frac{32434.5724}{6}\\\\ \mu=5405.76$

So, Mean Monthly Expenses of Population =$ 5405.76, which is 90% upper confidence bound for the company's mean monthly expenses.

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2 years ago

Can someone please help me ??

kap26 [50]

Answer:

Step-by-step explanation:

4 0

3 years ago

Is anyone good at elimination method? I will give 10 points to the person that answer the question. :)

Licemer1 [7]

To eliminate x, the coefficients of x's in both equations should be opposite numbers. Since the coefficient of x in the second equation is 3, the coefficient in the first equation should be -3. So she should multiply the first equation by -3.

8 0

3 years ago

Read 2 more answers

suppose the mean height for men is 70 inches with a standard deviation of 2 inches. What percentage of men are less than 74 inch

Ratling [72]

Answer:

97.7 %

Step-by-step explanation:

TWO standard deviations above the mean

z - score = 2 corresponds to .9772 97.7 %

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1 year ago

Please help me!! Question is on the image

Flura [38]

Answer:

Step-by-step explanation:

8+8+12+4+4+3+3

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3 years ago