Answer:
131.2 ;
12.8 ;
(118.4, 144)
Step-by-step explanation:
Given :
X = 131.2, s=55 , and n= 50
Point estimate of the mean :
Since, sample size is large (n > 30) ; the sample mean = population mean according to the center limit theorem :
Margin of Error = Zcritical * s / sqrt(n)
Zcritical at 90% = 1.645
Margin of Error : 1.645 * (55 / sqrt(50))
Margin of Error : 1.645 * 7.7781745
Margin of Error = 12.795097
Margin of Error = 12.8
The confidence interval (C.I) :
C.I = x ± margin of error
C. I = 131.2 ± 12.8
(131.2 - 12.8) ; (131.2 + 12.8)
(118.4, 144)
It’s the square root of 2 (100%)
5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100
Answer:
6840
Step-by-step explanation:
Well we know there's 24 hours in a day so dividing that by 1440 we get 60. Now we know that it consumes 60 watts ever hour. so now we just have to figure out how many hours there are and times that by 60. So there are 96 hours in 4 days plus 28=114. So times that by 60 ( watts) 114×60=6840
So that's your awnser.
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<span><span>9/8</span>=1<span> 1/8</span> miles</span>
To calculate the total distance walked, sum the 2 individual distances walked together.
<span>⇒<span>34</span>+<span>38</span></span>
We require to have common denominators, before adding.
<span><span>34</span>×<span>22</span>=<span>68</span></span>
<span>⇒<span>68</span>+<span>38</span>=<span>98</span>=1<span><span>18</span></span></span>
