A shipment of beach balls with a mean diameter of 28 cm and a standard deviation of 1.3 cm is normally distributed. By how many
standard deviations does a beach ball with a diameter of 31.9 cm differ from the mean?
A.) 1
B.) 1.3
C.) 2
D.) 3
2 answers:
Answer: 1
Step-by-step explanation: I took the test. 3 was wrong.
Answer: D.) 3
Step-by-step explanation:
Given: Mean diameter:
Standard deviation:
The required number of standard deviations is given by :-
Hence, a beach ball with a diameter of 31.9 cm is 3 standard deviations differ from the mean.
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