Answer:
The 95% confidence interval based on this sample is =
[6.41, 7.79]
Step-by-step explanation:
The formula for Confidence Interval =
Mean ± z × standard deviation/√n
Sample mean = 7.1 hours
Standard deviation = 5 hours
n = 200 students
z = 95% confidence interval z score
= 1.96
C.I = 7.1 ± 1.96 × 5/√200
C.I = 7.1 ± 0.693
Hence, Confidence Interval
= 7.1 - 0.693
= 6.407
Approximately = 6.41
= 7.1 + 0.693
= 7.793
Approximately = 7.79
Therefore, the 95% confidence interval based on this sample is
[6.41, 7.79]
You would divide 10.45 by .55 and you would get 19 so 19 is your answer hope this helps
Answer:
48 kg
Step-by-step explanation:
She can make 24 kg of dough in 3 hours
Multiply each by 2
She can make 24*2 kg of dough in 3*2 hours
She can make 48 kg of dough in 6 hours