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Every month for the last three years, a company has recorded the number of new customers for that month. The data have been summarised and grouped as follows:
What is the arithmetic mean of the number of new customers per month?
Suggested Answer: D
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13 comments · newest first
IN
Inocencia
12 months ago
Totally agree with 6.38, makes sense!
LA
Lavelle
12 months ago
Wait, how did they get 8.50? That seems way off.
EM
Emmanuel
1 year ago
I think it should be 6.38!
LO
Lorrie
1 year ago
So, the mean is 6.25, right?
CH
Chandra
1 year ago
The total number of new customers is 225.
LA
Larae
1 year ago
I feel like the answer might be around 6.38, but I’m not completely confident. I hope I remember the right formula for calculating the mean!
LU
Lucille
1 year ago
I practiced a question like this where we had to find the mean from grouped data. I think it involves using the midpoints, but I can't recall the exact steps.
AN
Annabelle
1 year ago
I think the arithmetic mean is found by dividing the total number of customers by the number of months, right? But I’m a bit confused about how to handle the grouped data.
CO
Cortney
1 year ago
I remember we calculated the mean in a similar question, but I’m not sure if I should sum the frequencies first or just the midpoints.
CH
Chantay
1 year ago
Hmm, this seems like a tricky one. I'll need to think through the different options carefully.
FL
Flo
1 year ago
I've got a good feeling about this one. The details are pretty comprehensive, so I think if I can break it down and tackle each part systematically, I should be able to work through this successfully.
SA
Sarina
1 year ago
I think the departmental secretary might not be exempt since they do a lot of clerical tasks, but I'm not completely clear on the specifics about administrative roles.
AR
Arlean
1 year ago
This seems straightforward enough. I'll review the options and choose the one that best matches the requirements of mirroring the disks and adding the flash devices as cache.