In the dataset "RestRating", the 30 randomly selected patrons give the overall dining experience ratings (Outstanding, Very good
, Good, Average, or Poor) at a restaurant on a Saturday evening
2 answers:
Answer:
The dataset image is attached.
The question has three parts:
a) Find the frequency distribution and relative frequency distribution for these data.
b) Construct a percentage bar chart for these data
c) Construct a percentage pie chart for these data
Explanation:
a)
Frequency distribution tell us how often something occurs.
Frequency distribution
Experience Rating Frequency
OutStanding 14
Very Good 10
Good 5
Average 1
Poor 0
This relative frequency distribution table shows how something are distributed.
Relative Frequency Distribution
Experience Rating Frequency Relative Frequency
OutStanding 14 14/30 = 7/15 = 0.467
Very Good 10 10/30 = 1/3 = 0.333
Good 5 5/30 = 1/6 = 0.167
Average 1 1/30 = 0.033
Poor 0 0
Total 30 1.000
b) Chart image is attached
c) Chart image is attached
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Answer:
a) 35%
b) yes it can be improved by moving the tray near the top
Tray should be located ( 1 to 2 meters below surface )
max removal efficiency ≈ 70%
c) The maximum removal will drop as the particle settling velocity = 0.5 m/h
Explanation:
Given data:
flow rate = 8000 m^3/d
Detention time = 1h
depth = 3m
Full length movable horizontal tray : 1m below surface
<u>a) Determine percent removal of particles having a settling velocity of 1m/h</u>
velocity of critical sized particle to be removed = Depth / Detention time
= 3 / 1 = 3m/h
The percent removal of particles having a settling velocity of 1m/h ≈ 35%
<u>b) Determine if the removal efficiency of the clarifier can be improved by moving the tray, the location of the tray and the maximum removal efficiency</u>
The tray should be located near the top of the tray ( i.e. 1 to 2 meters below surface ) because here the removal efficiency above the tray will be 100% but since the tank is quite small hence the
Total Maximum removal efficiency
= percent removal + percent removal
= ( d,v
) .
+ ( d
,v
) .
= 100
hence max removal efficiency ≈ 70%
<u>c) what is the effect of moving the tray would be if the particle settling velocity were equal to 0.5m/h?</u>
The maximum removal will drop as the particle settling velocity = 0.5 m/h
