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Ryan
Ryan, Engineer
Category: Calculus and Above
Satisfied Customers: 9016
Experience:  B.S. in Civil Engineering
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I need the answers to the questions below. statistics

Customer Question

I need the answers to the questions below.
statistics questions 4
- A health inspector at a restaurant will enter the kitchen and choose 5 stations to
inspect from a predetermined list of 15 stations present in most restaurant kitchens.
a. How many different sets of 5 stations exist?
b. If all sets are equally likely, what is the probability of each set?_ ·__ _, _
c. If the inspector were instead to randomly select 13 stations .to_ 'i_r~~p.e:c,:t, how many
different sets of 13 stations would exist? · · · · ·
d. If all sets were equally likely, what is the probability of each set?
- The company policy for customer service representatives gives time off for positive
reviews. If, in the first 20 calls a customer service agent handles In a day, 13 or more
elect to take a subsequent survey and rate the service as "excellent," then the company
gives the agent his or her final hour of work that day off, paid. Ellie receives excellent
reviews from about 30% of the calls she handles. Assuming she always receives at
least 20 calls in the first 7 hours of a workday, on what percentage of her 8-hour . .
workdays does Ellie get the final hour off?
- Since careful records have begun being kept in January, Eric's small business has
delivered the following quantities of flowers throughout town.
January February March April May June July August
BSomuaqllu ets 85 34 26 24 43 29 30 19
LBaorugqeu ets 23 64 27 18 33 23 20 13
- Assuming the data is normally distributed, _Eonstruct two separate 90% confidence
intervals, one for the number of deliveries of small bouquets in September and one for
the number of large bouquets in September.
quality control experiment is to be done on a machine that fills tubes with toothpaste.
Its specifications require that it fill tubes with 4. 7oz. A random sample of 40 tubes filled
by the machine is taken and each tube is weighed. The resulting data are below, with
the weight of the tube already having been subtracted from each:. Pertorm a hypothesis
test at the 90% confidence level to determine if the machine· is performing according to
specifications.
4.66 4.61 4.71 4.63 4.70 4.62 4.63 4.61 4.7b 4.56
4.60 4.66 4.68 4.57 4.67 4.72 4.67 4.64 4.66 4.75
4.69 4.64 4.67 4.65 4.69 4.65 4.75 4.53 4.57 4.74
4.68 4.67 4.66 4.68 4.64 4.65 4.64 4.80 4.71 4.69
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Submitted: 1 year ago.
Category: Calculus and Above
Customer: replied 1 year ago.
Assume that the number of sales per day of an app in the Apple iOS App store is normally distributed.a. What two parameters of the distribution would you need to be able to determine the probability of sales on a particular day exceeding 100 units?
b. If the probability of sales exceeding 100 units is 20% and the mean daily sales is 86 units, then what is the standard deviation of the distribution?
Expert:  Ryan replied 1 year ago.

Hi,

Thank you for using the site. Do the problems posted above represent the entire set that you need help with? I'm just checking to be sure that nothing is missing, because sometimes long posts like that get cut off before the end.

Ryan

Customer: replied 1 year ago.
total 5 questions. Thanks for your help!
Expert:  Ryan replied 1 year ago.

Ok, no problem. I'll have the solutions posted for you shortly.

Thanks,

Ryan

Expert:  Ryan replied 1 year ago.

Hi again,

Here are the solutions:

Solutions

Please feel free to ask if you have questions about any of these solutions.

Thanks,

Ryan