Dragon boat racing is a competitive water sport that involves 20 paddlers propelling boat across various race distances. a study on elite dragon boat paddlers summarized an extensive statistical analysis of data obtained from a sample of 11 paddlers. it reported that a 95% confidence interval for true average force (n) during a simulated 200-m race (60.2, 70.6. assume the paddling force is normally distributed.

(a) briefly describe what needs to be done in order to assume "the force is normally distributed"
(b) obtain a 95% prediction interval for the force of a single randomly selected dragon boat paddler undergoing the simulated race.
(c) calculate an interval that includes at least 99% of the paddling forces in the popula- tion distribution using a confidence level of 95 %.

the correct answer is semicircle

step-by-step explanation:

the answer is semicircle because the shorter arc joining two points on the circumference of a circle is known as the minor arc, the larger arc is called the major arc, and a semicircle is a half circle, formed by cutting a whole circle along a diameter line.

hope i .

step-by-step explanation:

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x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

(3x-8) or (3x+8)

step-by-step explanation: