Apply the 68-95-99.7 rule to answer the question. 4) The amount of Jen's monthly phone bill is normally distributed with a mean of $57 and a standard deviation of $9. What percentage of her phone bills are less than $48?
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7 rule states that in a normal distribution, 68% of the data falls within one standard deviation of the mean, 95% falls within two standard deviations, and 99.7% falls within three standard deviations. Show more…
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Solve the problem. The amount of Jen's monthly phone bill is normally distributed with a mean of $78 and a standard deviation of $12. Within what range are 68% of her phone bills? Between $66 and $90 Between $54 and 102 Between $78 and $90 Between $54 and $78
Sri K.
the mean amount of Jens monthly phone bill is $65 and the standard deviation is $8 a) if we assume nothing about the shape of the distribution, approximately what percent of her phone bills are between $41 and $89? What is the rule you are using to answer? b)if we assume that the monthly phone bill is normally distributed, approximately what percent of her phone bills are between $49 and $81? What is the rule you are using to answer? c) is a bill of 92 unusual? carefully explain your answer
Madhur L.
Use the empirical rule to solve the problem. The amount of Jen's monthly phone bill is normally distributed with a mean of $66 and a standard deviation of $8. Fill in the blanks. 68.26% of her phone bills are between $___ and $___. Group of answer choices
Qudsiya A.
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