The number of sales calls that 10 telemarketers make in one day are listed below
ID: 3357715 • Letter: T
Question
The number of sales calls that 10 telemarketers make in one day are listed below. 210 330 427 283 345 330 255 433 427 330 What is the median number of sales calls made he number of sales calls that 10 telemarketers make in one day are listed below. 210 330 427 283 345 330 255 433 427 330 What is the variance of the number of sales calls made?
In a recent survey, the following data was obtained in response to the question “Do you access the internet at work?” The responses are listed in the table.
Gender Yes No Total
Females 35 25 60
Males 13 27 40
Total 48 52 100
Given that the person does use the internet at work, what is the probability that the randomly selected person is a female?
Explanation / Answer
mean=sum/n=3370/10=337
variance=(sum(x-mean)2)/n =51396/10=5139.6
standard deviation=sqrt(variance)=sqrt(5139.6)=71.69
median divide the population in two equal part, it is the the middle observation when data is arranged in ascending or descending order. here ther are 10 observation so 5th (330) and 6th(330) observation are in middle. so average of these (330+330)/2=330 is median
(second part) answer is 0.7292
P(person use internet at work)=48/100=0.48
P(female)=60/100=0.6
P(female and use internate at work)=35/100=0.35
P(femal | person does use the internet at work)=P(female and use internate at work)/P(person use internet at work)=0.35/0.48=0.7292
s.n. x x-mean (x-mean)2 1 210 -127 16129 2 255 -82 6724 3 283 -54 2916 4 330 -7 49 5 330 -7 49 6 330 -7 49 7 345 8 64 8 427 90 8100 9 427 90 8100 10 433 96 9216 n= 10 10 10 sum= 3370 0 51396