and label all units. public poo 15% 47, 1412 50. 17, 165.221. 2435 14 181. 50,20
ID: 3070817 • Letter: A
Question
and label all units. public poo 15% 47, 1412 50. 17, 165.221. 2435 14 181. 50,20, 97 147,161, 20, 95, 10,158. 73, a. Find the standard deviation using your calculator I. The data below consists of the number of minutes that a sample of families spent in a b. Find Q, using your calculator. Find Po using formulas. Find the z-score corresponding to a family that spent 2 hours at the pool. Jse the range rule of thumb to identify significantly low and high numbers of minutes spe ool. (You may use your calculator to find 3 and s.)Explanation / Answer
Ans:
a)Use excle function STDEV
standard deviation=44.35
b)Q1=122
c)P30 means 30th percentile i.e. 30*0.3=9th position approximately
P30=(125+136)/2=130.5
d)Mean=148.87
2 hrs means 120 minutes
z=(120-148.87)/44.35
z=-0.65
e)when some data value falls beyond 2 standard deviations of the means,we say it is outlier
lower limit=148.87-2*44.35=60.17
upper limit=148.87+2*44.35=237.56
So,there are 2 outliers i.e. 50 and 245
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