In a mid-size company, the distribution of the number of phone
calls answered each day by each of the 12 receptionists is
bell-shaped and has a mean of 53 and a standard deviation of 11.
Using the empirical rule (as presented in the book), what is the
approximate percentage of daily phone calls numbering between 31
and 75?
Can you explain this for me too please
Solution :
Given that ,
mean = = 53
standard deviation = = 11
P(31 < x < 75) = P[(31 - 53)/ 11) < (x - ) / < (75 - 53) / 11) ]
= P(-2 < z < 2)
= P(z < 2) - P(z < -2)
= 0.9772 - 0.0228
= 0.9544
percentage = 95.44%
In a mid-size company, the distribution of the number of phone calls answered each day by...
In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 56 and a standard deviation of 9. Using the empirical rule, what is the approximate percentage of daily phone calls numbering between 47 and 65?
in a mid-size company the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell shaped and has a mean of 39 and a standars deviation of 10. using the epirical rule what is the approximate percentage of daily phone calls numbering between 19 and 59?
In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 43 and a standard deviation of 7. Using the empirical (68-95-99.7) rule, what is the approximate percentage of daily phone calls numbering between 29 and 57. Enter your answer as a percent, but do not enter the percent symbol. do not enter in decimal form( for example, enter 93.8 for 93.8% not...
In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 47 and a standard deviation of 8. Using the empirical rule (as presented in the book), what is the approximate percentage of daily phone calls numbering between 23 and 71?Please explain the answer broken down in detail
The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 45 and a standard deviation of 5. Using the empirical rule (as presented in the book), what is the approximate percentage of lightbulb replacement requests numbering between 35 and 45?
The physical plant at the main campus of a large state university recieves daily requests to replace fluorescent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 49 and a standard deviation of 9. Using the empirical rule, what is the approximate percentage of lightbulb replacement requests numbering between 49 and 76? Do not enter the percent symbol. ans = % 2) The number of potholes in any given 1 mile stretch of...
The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a bell-shaped distribution. This distribution has a mean of 64 and a standard deviation of 6. Using the empirical rule (as presented in the book), what is the approximate percentage of 1-mile long roadways with potholes numbering between 52 and 82?
The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a bell-shaped distribution. This distribution has a mean of 35 and a standard deviation of 11. Using the empirical rule (as presented in the book), what is the approximate percentage of 1-mile long roadways with potholes numbering between 13 and 68?
The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 54 and a standard deviation of 3. Using the empirical rule (as presented in the book), what is the approximate percentage of light bulb replacement requests numbering between 54 and 57? Do not enter the percent symbol. ans = %
2 Calculator Check Answer Question 17 The physical plant at the main campus of a large state university recieves daily requests to replace fluorescent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 63 and a standard deviation of 3. Using the empirical rule (as presented in the book), what is the approximate percentage of lightbulb replacement requests numbering between 63 and 69? Do not enter the percent symbol. ans = % Calculator...