The melting points of two alloys are being compared. thirty-five specimens of alloy 1 were melted. the average melting temperature was 517.0◦f and the standard deviation was 2.4◦f. forty-seven specimens of alloy 2 were melted. the average melting temperaturewas510.1◦2.1◦f. find a 99% confidence interval for the difference between the melting points.

i think the answer is seven, for if i'm being useless °ω°

step-by-step explanation:

yes, gavin is right.

step-by-step explanation:

gavin is correct. 

this problem is about converting 9% per year to how many percent per quarter. the rate is still the same. it only differed in the time period. so, through dimensional analysis,

9% per year  × (1 year / 4 quarters) = 2.25% per quarter

if he was asked to convert 9% per year to how many percent per quarter  compounded quarterly, then you will not simply divide by four. this is because compounding is not linear.

hope this , have a good day. c;

is there supposed to be a picture here?