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3 years ago

At 6 am the the temperature was -5. In the afternoon, the temperature was 10. What was the change of temperature during the day?

Mathematics

2 answers:

elena-s [515]3 years ago

7 0

15. Go from -5 to 10

lapo4ka [179]3 years ago

3 0

15°C just count to ten from -5

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Answer: a. n= 1068

b. n= 164

Step-by-step explanation:

The formula to find the sample size :

$n=p(1-p)(\dfrac{z^{*}}{E})^2$

, where p=prior population proportion , z* = critical z-value and E = Margin of error.

Here , let p=proportion of computers that use a new operating system.

Given : Confidence level = 95%

i.e. z* = 1.96 [by z-table]

Margin of error : E = 3% =0.03

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Then, $n=(0.5)(1-0.5)(\dfrac{1.96}{0.03})^2=1067.11111\approx1068$

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