Answer: (14.18, 15.08)
Step-by-step explanation:
Given : Sample size : n= 64
Sample mean : 
Standard deviation : 
Significance level : 
Critical value : 
The confidence interval for population mean is given by :-
Hence, the 90% confidence interval for the population mean of waiting times is (14.18, 15.08).
Answer:
15+15=30
Step-by-step explanation:
The answer is A. Y=2x+2
Because the slope is 2 and it crosses the Y axis at 2
Answer:
100% correct
Step-by-step explanation:
Answer:
175.415
Step-by-step explanation:
surface area of square pyramid is given by:
Area= s^2 + 2(s)(l)
where s is the base and l is the slant height
in given problem, slant height l is not given, so by using Pythagoras theorem finding l:
c^2= a^2 + b^2
= 8^2 + 4^2
= 48.49
c = 6.96348
Now putting values of s=8 and l= 6.96 in first formula
Area= 8^2 + 2(8)(6.96)
= 64 + 111.41
= 175.415
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