Answer:
<h2>18 + 45m</h2>
Step-by-step explanation:
The distributive property: a(b + c) = ab + ac
9(2 + 5m) = (9)(2) + (9)(5m) = 18 + 45m
Answer would be OB: 60 m2
Answer:
Mean= the average of the number set= 18+18+63+63+84=246/5=49.2
Median- the number in the middle of the set= 63
Mode- the number(s) that repeat=1 8, 63
Range- the amount between the highest and lowest numbers= 84-18=66
Step-by-step explanation:
Answer:
a) n = 100
![\bar{x} = 58](https://tex.z-dn.net/?f=%5Cbar%7Bx%7D%20%3D%2058)
s = 8
Confidence interval = 95%
Z at 95% = 1.96
Confidence interval formula :
to ![\bar{x}-z\frac{s}{\sqrt{n}}](https://tex.z-dn.net/?f=%5Cbar%7Bx%7D-z%5Cfrac%7Bs%7D%7B%5Csqrt%7Bn%7D%7D)
Substitute the values :
Confidence interval :
to ![58+1.96 \times \frac{8}{\sqrt{100}}](https://tex.z-dn.net/?f=58%2B1.96%20%5Ctimes%20%5Cfrac%7B8%7D%7B%5Csqrt%7B100%7D%7D)
Confidence interval :
to ![59.568](https://tex.z-dn.net/?f=59.568)
b)n = 200
![\bar{x} = 62](https://tex.z-dn.net/?f=%5Cbar%7Bx%7D%20%3D%2062)
s =11
Confidence interval = 90%
Z at 90% = 1.64
Confidence interval formula :
to ![\bar{x}-z\frac{s}{\sqrt{n}}](https://tex.z-dn.net/?f=%5Cbar%7Bx%7D-z%5Cfrac%7Bs%7D%7B%5Csqrt%7Bn%7D%7D)
Substitute the values :
Confidence interval :
to
Confidence interval :
to ![63.275](https://tex.z-dn.net/?f=63.275)