she sold a total of 97 shirts, so mulitiply 97 by the profit, which is 27. that gives you the answer of $1649.
Answer:
d. (0.737, 0.823)
The 90% confidence interval is = (0.737, 0.823)
Step-by-step explanation:
Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.
The confidence interval of a statistical data can be written as.
p+/-z√(p(1-p)/n)
Given that;
Proportion p = 195/250 = 0.78
Number of samples n = 250
Confidence interval = 90%
z value(at 90% confidence) = 1.645
Substituting the values we have;
0.78 +/- 1.645√(0.78(1-0.78)/250)
0.78 +/- 1.645√(0.0006864)
0.78 +/- 1.645(0.026199236630)
0.78 +/- 0.043097744256
0.78 +/- 0.043
(0.737, 0.823)
The 90% confidence interval is = (0.737, 0.823)
The comment on top of me is a virus don’t go on it
Answer:
Step-by-step explanation:
Say we are testing 100 people
we test 100 times
80 of the 100 tests result in 5 people having the disease.
so 5 people of 80 of 100 test have this disease
therefore, 5/80/100
.065
