What is the circumference of a circular swimming pool with a diameter of 6 ½ feet? (use 22 over 7 as pi)
1 answer:
Answer:
10.21 feet.
Step-by-step explanation:
circumference of circle with diameter d is given by
where r is the radius of the circle.
_____________________________
given
diameter = 6 1/2 = 13/2 feet
\thus, circumference of circle is calculated as following
Thus, circumference of given circle is 10.21 feet.
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Answer: Test statistic = -8 and rejected region is (-∞,-1.966) and (1.966, ∞)
Step-by-step explanation:
Since we have given that
X is the length of a rod.
Sample Mean = 2 inches
Standard deviation = 0.5 inches
n = 400
Hypothesis are
Test statistics would be
Degrees of freedom = n-1 =400-1 =39
and
Using the t-distribution table, we get that critical value z = 1.966
Since the two tail test will be applied to this,
So, the acceptance region will be (-1.966, 1.966)
Hence, the rejected region will be (-∞,-1.966) and (1.966, ∞)