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svp [43]
4 years ago
11

Write all the terma in...

Mathematics
1 answer:
natta225 [31]4 years ago
3 0
Coefficient is any number
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A random sample of 56 lithium batteries has a mean life of 645 hours with a population standard deviation of 31 hours. Compute t
bearhunter [10]

Answer: A. ​(636.9, 653.1)

Step-by-step explanation:

Given : Sample size : n=56

Significance level :\alpha: 1-0.95=0.05

Critical value :z_{0.05}=1.96

Sample mean : \overline{x}=645\text{ hours}

Standard deviation : \sigma= 31\text{ hours}

The 95% confidence interval for population mean is given by :-

\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=645\pm (1.96)\dfrac{31}{\sqrt{56}}\\\\=645\pm8.1\\\\=(636.9, 653.1)

Hence,  95% confidence interval for population mean is (636.9, 653.1).

8 0
3 years ago
A fair die is a cube with number 1 through 6 on
frutty [35]

Answer:

1/6

Step-by-step explanation:

assuming a fair die with 6 sides numbered 1-6,

since there are a total of 6 sides, the total possible numbers landing face up are 1,2,3,4,5,6 (i.e 6 possible outcomes)

we are asked to find the probability when the number 6 lands face up. Realize that there is only one way in which this can happen. hence the number of favorable outcomes is only 1.

Hence the probability of rolling a 6,

= number of favorable outcomes / number of possible outcomes

= 1/6

4 0
4 years ago
What is the name of a quadrilateral that has 4 equal sides but does not always have right angles
gayaneshka [121]
A quadrilateral with all sides equal is a rhombus. 
If its angles are also all equal, then the rhombus
is a square.
5 0
3 years ago
Curtis decided to go on a road trip to Canada. On the first day of his trip, he drove for 13 hours and traveled 884 miles. At wh
liraira [26]

Miles per hour

884 per 13 hours


884/13 = 68 miles per hour

4 0
4 years ago
Read 2 more answers
Please Please Help!<br> y = −3x + 3
fredd [130]

Answer:

(0,3) and (1,0)

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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