Markus O'Hara
Jan 27, 2025
Me ! 1. the average cost per ounce for glass cleaner is 7.7 cents with a standard deviation of 2.5 cents. what is the z-score of glass
The average cost per ounce for glass cleaner is 7.7 cents, with a standard deviation of 2.5 cents. What is the z-score for glass cleaner with a cost of 10.1 cents per ounce?
a. 0.96
b. 1.31
c. 1.94
d. 4.04
e. none of the above
A candy bar takes an average of 3.4 hours to move through an assembly line, with a standard deviation of 0.5 hours. What is the probability that the candy bar will take between 3 and 4 hours to move through the line?
a. 0.2119
b. 0.2295
c. 0.6731
d. 0.3270
e. 0.8849
The average noise level in a diner is 30 decibels, with a standard deviation of an unspecified value. What is the maximum noise level that is exceeded 1% of the time?
a. 16.04
b. 30.00
c. 36.00
d. 43.96
e. 48.00
The mean income per household in a certain state is $29,500, with a standard deviation of $5,750. What are the income values that encompass the middle 95% of households, assuming the incomes are normally distributed?
a. $23,750 and $35,250
b. $18,000 and $41,000
c. $29,500 and $41,000
d. $12,250 and $46,750
e. $12,325 and $81,550
6 Answers
Feb 13, 2025
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