Answer:
Step-by-step explanation:
Answer:
(0.392 ; 0.508)
Step-by-step explanation:
Given that :
p = 45% = 0.45
α = 1 - 90% = 0.1
Zα/2 = Z0.01/2 = Z0.05 = 1.645 (from Z standard table).
Using the relation :
p ± Z0.05*sqrt((p(1-p))/n)
p ± 1.645 * sqrt(0.45(0.55)/200)
p ± 1.645 * sqrt(0.0012375)
p ± 1.645 *0.0351781
0.45 - (1.645 * 0.0351781) = 0.3921320255
0.45 + (1.645 * 0.0351781) = 0.5078679745
(0.392 ; 0.508)
B
Do 450 x 2/5 (0.4 in decimal form)
The picture is upside down my dude, delete the question, re-upload it and ill help you out.
Answer:
64
Step-by-step explanation:
Looking at the number 63.62, you see that 6 comes immediately after the decimal point.
Now if the number after the decimal point is more than 5 we round up by adding one to the number just before the decimal point which is 3 in this case.
Assuming the number after the decimal point was less than 5 we would round down adding nothing to the number just before the decimal point.
