<span>The data collected in any poll could be tallied inaccurately to lead others to believe incorrect conclusions. The best ways to ensure accuracy are to revisit the study questions and recount the inquiries that were provided. Other studies may have concluded prematurely and without an adequate amount of questions about the product at hand.</span>
Answer:
29 %
Explanation:
check the table for given condition and divide by total no of students
Answer:
a) We need to find p(x<68.15)
Standardize x to z, we have, z = (68.15-μ)/σ
=(68.15-57)/8.1
=1.38
Reading from standard normal tables,
p(z<1.38) =0.9162.
b) We need to find p(x>54.4)
Standardize x to z, we have, z = (54.4-μ)/σ
=(54.4-57)/8.1
=-0.32
Reading from standard normal tables,
p(z>-0.32) = 0.6255
