Answer:
95% confidence interval = ( 28.9485, 40.1515 )
Step-by-step explanation:
sample size( n ) = 52
mean value ( x )= 34.55
std ( б ) = 20.12
H0 : <em>u </em>≤ 30
Ha : u > 30 ( claim )
95% confidence interval for mean SPF level ( df = 51 )
= mean value ±
95% confidence interval = ( 28.9485, 40.1515 )
we cannot reject H0
Answer:
-1+2=y and i dont understand the second one
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
If you divide 48 by 12 you will get 4 and 4 is your answer
4/7= 0.57142857
Rounded to nearest hundredth is
0.57
Answer:
C
Step-by-step explanation:
The circumference of a circle can be found by multiplying the diameter by pi. Therefore, the circumference of the circle is about 9.5 miles, and biking around it 4 times would be about 38 miles. Therefore, the correct answer is choice C. Hope this helps!