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grandymaker [24]
3 years ago
14

Helppppp plzzzzzzz steppsss iff posiblleeee, will mark brailest!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
dem82 [27]3 years ago
6 0

Answer:

54

Step-by-step explanation:

126+x=180

x=180-126=54

x=54

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3 years ago
Use the given data to find the 95% confidence interval estimate of the population mean μ. Assume that the population has a norma
loris [4]

Answer: For 95% Confidence Interval:

Upper Limit = 110.2

Lower Limit = 97.8

95% Confidence Interval = [97.8, 110.2]

Step-by-step explanation:

Given that,

Mean(M) = 104

Standard Deviation(SD) = 10

Sample Size(n) = 10

Formula for calculating 95% Confidence Interval are as follows:

Standard error(SE) =\frac{SD}{\sqrt{n} }

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⇒ M ± Z_{0.95} × SE

= 104 ± (1.96)(3.164)

= 104 ± 6.20

∴ Upper Limit = 104 + 6.20 = 110.2

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So,

95% Confidence Interval = [97.8, 110.2]

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3 years ago
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3 years ago
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Caroline's coffee shop sells a refill mug for $8.95. Each refill cost $1.50. Last month Sean spent $26.95 on a mug and refills.
Talja [164]
Alright! First you'd have to subtract the flat fee of the mug which is $8.95, then you'd have to divide by the rate which is $1.50. Your equation would be:
 (26.95 - 8.95) ÷ 1.50 = r 

Then you solve using your head.. lol.
(26.95 - 8.95) = 18.
(18 ÷ 1.50) = 12.
R = 12.

Hope this helps :).
3 0
4 years ago
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