actually, the problem I was given was this: The mean age of seven people is 49 years. The ages of five of these seven people are 63, 39, 44, 51, and 38. If the 6th and 7th people in the group have the same age, find the age of the 6th and 7th members of the group. I think I got the answer to this problem which is 58.
(63 + 39 + 44 + 51 + 38 + x + x) divided by 7 = 49 235 + 2x = 343 combine like terms and multiply both sides by 7 2x = 108 subtract 235 from both sides x = 54 divide both sides by 2
Set up the first equation as shown in this video. However, because you have 2 missing frequencies you will need 2 equations to solve it. Your second equation can be adding up all the frequencies. That should end up with something like x + y + 10 = 20. Then you can solve those simultaneous equations using elimination, substitution or graphing. If you would like, feel free to email me the question at nywelton@yahoo.com and I can show you the steps.
John Blogs In general you can't solve a problem with two missing numbers. Maybe you missed a part of the question that gave you one or the other. If you want to reply with the question or message me the question I will help you with it.
@@JWelton I got the same question, A list of 5 observations is given, but only for 4 of them their deviations from the mean were recorded: -1,2,3,2 Calculate the variance of the five observations.
+Lern Jergi Is it few enough numbers that you can write them out? Just make sure that there are an equal number of numbers on either side of the median.
A list of 5 observations is given, but only for 4 of them their deviations from the mean were recorded: -1,2,3,2 Calculate the variance of the five observations
Better than my real maths teacher - Thanks! :)
What if you are missing one value but are not given the meand
For the exercise I got my answer as 9 is that correct?
can you do a video for the median?
Where can I find the link that shows me the answer?
How do you get 8 though if you dividing 134 +6x by 15 +x that's not clear to me
+Joey Friedman I was given the 8 in the original question. So I knew that if you divide the total amount by the number of numbers you should get 8.
can this formula apply to finding Two missing frequencies?
No. With two missing frequencies you need another piece of information. Feel free to type the problem and I'll take a look at it.
actually, the problem I was given was this:
The mean age of seven people is 49 years. The ages of five of these seven people are 63, 39, 44, 51, and 38. If the 6th and 7th people in the group have the same age, find the age of the 6th and 7th members of the group.
I think I got the answer to this problem which is 58.
Would you by any chance know how to calculate initial velocity in calculus?
(63 + 39 + 44 + 51 + 38 + x + x) divided by 7 = 49
235 + 2x = 343 combine like terms and multiply both sides by 7
2x = 108 subtract 235 from both sides
x = 54 divide both sides by 2
Take the derivative of the location/place formula and find the value of 0
you’re a life saver
How did you get the mean of 8?
hey thnx for the video. Can u help me with a sum with TWO missing frequncies?
Set up the first equation as shown in this video. However, because you have 2 missing frequencies you will need 2 equations to solve it. Your second equation can be adding up all the frequencies. That should end up with something like x + y + 10 = 20. Then you can solve those simultaneous equations using elimination, substitution or graphing. If you would like, feel free to email me the question at nywelton@yahoo.com and I can show you the steps.
Rahul Nambiar kmk
where is the link
do you do the same thing with cumulative frequency tables? you just use the mid interval??
Yes. Taking the final cumulative number and dividing by 4 will get you the quartiles.
@@JWelton can u pls tell me were is the link
What do you do if you are not given the mean, and there is a missing frequency in the table
John Blogs In general you can't solve a problem with two missing numbers. Maybe you missed a part of the question that gave you one or the other. If you want to reply with the question or message me the question I will help you with it.
@@JWelton mean is not given in question so what we do
@@JWelton I got the same question,
A list of 5 observations is given, but only for 4 of them their deviations from the mean were recorded: -1,2,3,2 Calculate the variance of the five observations.
Bro but mean value not mention in the question bro then how can we do ....
Is it 9
I thank you very much indeed!
thank you, bro, that formula brilliant
what if you're given a median instead of a mean?
+Lern Jergi Is it few enough numbers that you can write them out? Just make sure that there are an equal number of numbers on either side of the median.
J Welton nevermind, sorry, it was for a test but I understand how to do it now. Thank you anyway. Very helpful video
What is the answer
200th like but how do you do it without mean?
Thank youuu😂😂💖
A list of 5 observations is given, but only for 4 of them their deviations from the mean were recorded: -1,2,3,2 Calculate the variance of the five observations
Thanks really help full
Love you video but the marker sound gives me chills
thanks, vedio is really good
v nice
Thx
X= 36
answer= -9
148
x and × looks alike