BUAL 2650 EXAM 1 HW | QUESTIONS AND ANSWERS | PASSED!!

BUAL 2650 EXAM 1 HW | QUESTIONS AND
ANSWERS | PASSED!!


What percent of the area under the normal curve is within 1 standard
deviation to the left and right? - ANSWERS-68.26



What percent of the area under the normal curve is within 2 standard
deviation to the left and right? - ANSWERS-95.44



What percent of the area under the normal curve is within 3 standard
deviation to the left and right? - ANSWERS-99.73



How do you calculate a z-score? - ANSWERS-(value-mean)/standard
deviation



What is the difference between x and z? - ANSWERS-x is normal
distribution where z is standard normal distribution



What is cumulative probability? - ANSWERS-means less than, the left
side under curve



What must you do to find probability to the right of a Z score? -
ANSWERS-1 - value from Z table

, P (z< 2) - ANSWERS-0.9772



P (z<1.25) - ANSWERS-0.8944



P (z>2.3) - ANSWERS-0.0107



P (-1 < z< 2) - ANSWERS-0.8185

What is quantitative value that represents the outcomes from an
experiment? - ANSWERS-Random Variable



What are the 2 kinds of random variables? - ANSWERS-discrete
(countable) and continuous (decimals)



What is the most common type of continuous probability distribution? -
ANSWERS-normal distribution



What are some other names for a continuous probability distribution? -
ANSWERS-probability curve and probability density function (pdf)



What is the total area under the curve if f(x) always equal to? -
ANSWERS-1 or 100%



What is an area under a continuous probability distribution? -
ANSWERS-a probability