I Disaster Airlines Determined That the Mean Number of Passengers

question 135

Multiple Choice

i. Disaster Airlines determined that the mean number of passengers per flight is 152 with a standard
Deviation of ten passengers. Practically all flights have between 142 and 162 passengers.
ii. The total area under the normal curve is less than 1.
iii. The mean of a normal probability distribution is 500 and the standard deviation is 10.
About 68 percent of the observations lie between 480 and 520.

• A) (i), (ii), and (iii) are all correct statements.
• B) (i) is a correct statement but not (ii) or (iii).
• C) (i) and (iii) are correct statements but not (ii).
• D) (i) and (ii) are correct statements but not (iii).
• E) (i), (ii), and (iii) are all false statements.

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Definitions:

Medications

Substances used to treat or prevent disease or relieve pain, prescribed or over-the-counter.

Psychological Disorders

Conditions characterized by abnormal thoughts, feelings, and behaviors that may cause distress or impair function in life.

Psychotherapy

A therapeutic treatment involving psychological techniques, used to treat mental health problems and emotional challenges.

Depression

A common and serious medical illness that negatively affects how you feel, the way you think, and how you act, offering a persistent feeling of sadness and loss of interest.