Answer:x= -1/2
Step-by-step explanation:
Your answer would be 125.4 cause the number is too small to be 130 so yeah hope this helps
<h2>|| <u>Question</u> ||</h2><h3>
</h3>
<h2>|| <u>Answer</u> ||</h2><h3>
</h3>
[ 5 × 12 = 60 ]
<h3>
</h3><h3>
</h3>
[ Refer the attachment ]
Answer:
Step-by-step explanation:
The empirical rule, also referred to as "the three-sigma rule or 68-95-99.7 rule, is a statistical rule which states that for a normal distribution, almost all data falls within three standard deviations (denoted by σ) of the mean (denoted by µ)". The empirical rule shows that 68% falls within the first standard deviation (µ ± σ), 95% within the first two standard deviations (µ ± 2σ), and 99.7% within the first three standard deviations (µ ± 3σ).
And on this case since we are within 3 deviations (because we have 99.7% of the data between 568 and 1066hours), the result obtained using the z score agrees with the empirical rule.
So on this case we can find the standard deviation on this ways:
(1)
(2)
If we subtract conditions (2) and (1) we got:
Answer:
no 4 is not perfect cube and no 2 is perfect cube