Recent content by werson9339

Homework Statement when the balance point is achieved , there're no current passing thru , so Galvanometer should show 0 . Am i right... so there's no current passing thru the 20 ohm resistor . so my working is ( 8.1/120 )(40) = 2.7 V ... correct me if I'm wrong...Homework EquationsThe Attempt...

Homework Statement This involve testing population proportion. (either small or big sample) this question is done by my lecturer by using binomial , i am wondering could it be done using normal distribution? because the np is 20(0.45) = 9 which is greater than 5 ...

anyone can answer please? thanks in advance!

Homework Statement Person A claims that the porportion of household installed with solar heater is 0.15. A random sample of 250 household iataken. Assuming the claim of person A is true, finding the probability that tge sample proportion is within 0.05 of the population proportion. Homework...

Homework Statement A bag contains a large number of coins comprises of 1 cent and 5 cents coins in the ration of 1:3 find the man and variance of the values of coins.. i have attached the sample ans here. i don't understand why the value of '2' is used?? why not '5' ...for me '5' represent 5...