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Answer with explanation:</u></h2>
Formula to find the confidence interval for population mean :-
, where = sample mean.
t*= critical z-value
n= sample size.
s= sample standard deviation.
By considering the given question , we have
n= 50
Degree of freedom : df = 49 [ df=n-1]
Significance level :
Using students's t-distribution table, the critical t-value for 95% confidence =
Then, 95% confidence interval for the population mean will be :
Hence, a 95% confidence interval for the population mean = (24.24, 27.76)
Since 28 is not contained in the above confidence interval , it means it is not reasonable that the population mean is 28 weeks.
Answer:
298-275 = 23 cm thus D) is the answer
Step-by-step explanation:
First Box:
length l = 9.5 cm
width w = 5 cm
height h = 7 cm
diagonal d = 12.8160056 cm
total surface area S_tot = 298 cm2
lateral surface area S_lat = 203 cm2
top surface area S_top = 47.5 cm²
bottom surface area S_bot = 47.5 cm²
volume V = 332.5 cm³
Second Box:
length l = 7.5 cm
width w = 5 cm
height h = 8 cm
diagonal d = 12.0519708 cm
total surface area S_tot = 275 cm²
lateral surface area S_lat = 200 cm²
top surface area S_top = 37.5 cm²
bottom surface area S_bot = 37.5 cm²
volume V = 300 cm³
Answer:
3+√5
Step-by-step explanation:
mark me as brainliest ❤️
Answer:
13 : 4
Step-by-step explanation:
13 : 4
he has 13 cows and he has 4 bales of hay so 13:4
you can't simplfy it so its still 13 : 4
Answer:
<em>12+16= 28m</em>
<em>28m</em> <em>is the combined height of the trees</em> .
Hope this helps !