Answer:no
Step-by-step explanation:
Answer:
fail 0-x. mid values. =X/2
pass x-a. =(x+a)/2. pass no.=250-35-15-23=177
credit a-y. =(a+y)/2
distinction y-100. =(y+100)/2
mean=1/250*(x/2)×23+(x+a)/2*177+(y+a)/2×35+(y+100)/2×15=64
1/500[23x+177x+177a+35a+35y+15y+100*15)=64
200x+212a+50y+1500=32000
variance=[(X/2-64)^2*23+(x+a,/2-64)^2*277+(a+y/2-64)^2*35+(100+y/2-64)^2*15]/250=(8.6)^2
I've made two equations that has to be simplified.
probably a nother data has to be given since we have 3 variables to solve for(X,a,y)
Answer:
This type of sampling method is Simple Random sampling
Step-by-step explanation:
Sampling is used in processing information. Sampling is used to present large population of information into smaller groups known as samples for the purpose of analysis.
In simple random sampling, the elements are selected at random with each element having equal chance or probability of being selected. One way of obtaining a random sample is to give each element in a population a number or name, and then randomly selecting which elements to include
Hello! I see this is your very first question, so welcome to brainly!!
Answer-
Refractive index(R.I) is 4/3
Apparent depth = d/(R.I) = 20/(4/3) = 20 (3/4) = 15cm
Hope this helps! Have a great day,
-AcEdd
