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madhu.mukherjee.946
 one year ago
calculate the arithmetic mean:
age group: 1415 1617 1820 2124 2529 3034 3539
no.of wage earners: 60 140 150 110 110 100 90
madhu.mukherjee.946
 one year ago
calculate the arithmetic mean: age group: 1415 1617 1820 2124 2529 3034 3539 no.of wage earners: 60 140 150 110 110 100 90

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madhu.mukherjee.946
 one year ago
Best ResponseYou've already chosen the best response.0its difficult to calculate the mid value here coz the common difference is changing

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2hmm don't we hve to add all the numbers and divide by the number of numbers

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2tag ganeshie8 or freckles

madhu.mukherjee.946
 one year ago
Best ResponseYou've already chosen the best response.0@ganeshie8 @freckles

freckles
 one year ago
Best ResponseYou've already chosen the best response.3just add the numbers and divide by the number of numbers

madhu.mukherjee.946
 one year ago
Best ResponseYou've already chosen the best response.0no in group frequency we don't solve it like that way

freckles
 one year ago
Best ResponseYou've already chosen the best response.3oh I see the mid value is just the sum of endpoints and that result divided by 2

freckles
 one year ago
Best ResponseYou've already chosen the best response.3for example: \[\frac{14+15}{2}=\frac{29}{2}=14.5\]

freckles
 one year ago
Best ResponseYou've already chosen the best response.3so x_1=14.5 and f_1=60 x_1*f_1=14.5*60

freckles
 one year ago
Best ResponseYou've already chosen the best response.3\[\text{ mean }=\frac{x_1 f_1 +x_2 f_2 +x_3 f_3+x_4f_4+x_5f_5+x_6f_6+x_7f_7}{f_1+f_2+f_3+f_4+f_5+f_6+f_7} \\ \]

freckles
 one year ago
Best ResponseYou've already chosen the best response.3at least that is my definition of midpoint http://www.yale.edu/ynhti/curriculum/units/1986/5/86.05.03.x.html here they pick the midpoint of 99 to 100 as 98 which is odd because that is not the midpoint of 99 to 100

freckles
 one year ago
Best ResponseYou've already chosen the best response.3https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0CCYQFjABahUKEwi65aKCc7HAhXGe5IKHe0GCyQ&url=http%3A%2F%2Fwww.ncert.nic.in%2Fncerts%2Fl%2Fjemh114.pdf&ei=Gv3hVbrwCsb3yQTtjaygAg&usg=AFQjCNHJrODzYQJjv0n7Hewgqz1FdTeu8g&sig2=y8vTO034h9vpbuUPodRU_Q page 269 contains classes with unequal width

madhu.mukherjee.946
 one year ago
Best ResponseYou've already chosen the best response.0thank you so much

freckles
 one year ago
Best ResponseYou've already chosen the best response.3@madhu.mukherjee.946 still trying to figure out how to pick h dw:1440874552930:dw so I think I will choose a to be that thingy there because it looks like they are picking a to be one of the "middle numbers" and we only have one middle here since we have an odd amount of data entries do you ever seen this method? And do you know how to pick h?

freckles
 one year ago
Best ResponseYou've already chosen the best response.3dw:1440874856438:dw

freckles
 one year ago
Best ResponseYou've already chosen the best response.3the next column involves the h value and I'm still trying to find out how they picked in the last example or two

freckles
 one year ago
Best ResponseYou've already chosen the best response.3I guess we can just see what happens if we pick h to be 2

freckles
 one year ago
Best ResponseYou've already chosen the best response.3dw:1440875337918:dw