True or false: a. All normal distributions are symmetrical b. All normal distributions have a mean of 1.0 c. All normal distributions have a standard deviation of 1.0 d. The total area under the curve of all normal distributions is equal to 1

necessaryh 2020-12-01 Answered
True or false:
a. All normal distributions are symmetrical
b. All normal distributions have a mean of 1.0
c. All normal distributions have a standard deviation of 1.0
d. The total area under the curve of all normal distributions is equal to 1
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Expert Answer

liannemdh
Answered 2020-12-02 Author has 106 answers
Step 1
a) True, all normal distributions are symmetrical, bell shaped curve.
Step 2
b) False: Not all normal distributions have mean as 1. Means vary depending on the type of data.
Step 3
c) False: Not all normal distributions have standard deviations as 1. Standard deviation, or for that matter, variance vary depending on the type of data.
Step 4
d) True: Total area under the curve of all normal distribution is 1.
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