Please help me to do this maths/statistics question using this data sheet.

[4keven4]

Yaluwane mei 3 questions wala anthima uththaraya ganna udawwak karanna puluwanda?
please menne mekay data sheet eke..
eke screenshot ekak

Menna mewwa thamay questions tika...
please help..

1. Make the best possible estimate (to the nearest whole number) of the number of females of the entire population older than 24.
   
2. Two persons are selected at random, one from Ocean Reef and one from Heathridge. What is the probability that both are between 5 and 54 years old?
   
3. One person from each of the four suburbs is selected at random. Find the probability that all four persons are male.
   
4. Consider all households in Joondalup and Ocean Reef. Make the best possible estimate of their median weekly household income rounded to the nearest dollar. (Do not include a $ sign in your answer, just the number.)

 

[4keven4]

ayyoooo bump...
maths karapu kattiya
help ekak denna

 

[Tom Riddle]

1. Make the best possible estimate (to the nearest whole number) of the number of females of the entire population older than 24.

Assuming that the distribution of males and females who are older than 24 is the same as the distribution of the whole population

(55400 + 10858 + 10260) * 62678/124456 = 38536



2. Two persons are selected at random, one from Ocean Reef and one from Heathridge. What is the probability that both are between 5 and 54 years old?

Total number of people in Ocean Reef = 16180
Number of people between 5 and 54 in Ocean Reef = 832 + 2690 + 2686 + 6964 = 13172
Prob that the person selected from Ocean Reef is between 5 and 54 years old = 13172/16180

Similarly, Prob that the one from Heathridge is between 5 and 54 years old = 34902/41292

Prob that BOTH are between 5 and 54 years old = (13172/16180) * (34902/41292) = 0.0678



3. One person from each of the four suburbs is selected at random. Find the probability that all four persons are male.

Prob that the person picked from Joondalup is male = 25014/50520 = 0.495
Prob that the person picked from Ocean Reef is male = 8118/16180 = 0.502
Prob that the person picked from Heathridge is male = 20160 /41292 = 0.488
Prob that the person picked from Beldon is male = 8036/16464 = 0.488

Prob that all 4 are male = 0.495*0.502*0.488*0.488 = 0.059



4. Consider all households in Joondalup and Ocean Reef. Make the best possible estimate of their median weekly household income rounded to the nearest dollar. (Do not include a $ sign in your answer, just the number.)

Not too sure about this, my wild guess is (1160+1598)/2

 

[migaramk]

බම්ප්

 

[suranga84]

බම්ප් මම ගණිතයට දුර්වලයි

 

[Rovin]

bumpz

 

[ModelSriLanka]

oya peththa danne ne ban



Bump

 

[JAASBandara]

බම්ප්

 

[4keven4]

thanks yaluwane bumps walata hari..
godak sthuthi..
tom riddle ayyatath thank u...
iwaray test eka

 

[Rockey_ssr]

iwarada ela ela

 

[eghty]

Tom Riddle Has already done it , but Kevin wot the heck u doin with statistics ???

 

[4keven4]

Tom Riddle Has already done it , but Kevin wot the heck u doin with statistics ???

ow...
we have some statistics to learn bro...
its some proficiency test machan....

 

[twisted]

holy..I don't think I've more brain cells left to fry.

 

[4keven4]

holy..I don't think I've more brain cells left to fry.

lol...
some brain crunchin stuff are good for ur health as well i guess...

 

[dan1231]

if the excel file links there that'd be easy bro