Question
In: Statistics and Probability
Over a three day period a clothing store sold the following number of shirts: 51, 65,...
Over a three day period a clothing store sold the following number of shirts: 51, 65, and 44. Over the same period the clothing store had 3, 6, and 1 sales staff working on the shop floor. Answer the following questions: Enter your final answers in the boxes below. Show ALL working by uploading your handwritten working for this question to Laulima Dropbox within 15 minutes of completing your exam. Correct answers without working shown will not receive full credit. Note that writing Excel functions does NOT qualify as showing working. a) (2) What is the sample standard deviation of number of shirts sold? What is the sample standard deviation of the number of sales staff? b) (3) What is the sample covariance? Why is it hard to interpret? Show all work
Solutions
orchestra answered 2 years agoRelated Solutions
The number of one type of sold product in one store is listed below. 51 55...
The number of one type of sold product in one store is listed
below.
51 55 49 61 53 49 62 54 49 51 48 50 53 51 52 52 52 51 51 48
1.(5) calculate mean, median, mode, lower quartile and upper
quartile.
2.(5) construct a modified box-plot.
The number of computers sold during one day by a small store is a random variable...
The number of computers sold during one day by a small store is
a random variable XX with the following distribution:
P(0)=0.12,P(1)=0.19,P(2)=0.19,P(3)=0.12,P(4)=0.06,P(5)=0.32P(0)=0.12,P(1)=0.19,P(2)=0.19,P(3)=0.12,P(4)=0.06,P(5)=0.32
a. Compute the expected value E(X)E(X). Give your answer two
decimal places.
E(X)=E(X)=
b. Compute the standard deviation σ(X)σ(X). Give your answer two
decimal places.
σ(X)=σ(X)=
1 point) The problem below describes an experiment and defines a
random variable.
(a) Find the distribution of the random variable (and provide it as
a chart).
(b) Calculate the expected value...
The accompanying table gives the number of a popular household item sold by a store over...
The accompanying table gives the number of a popular household
item sold by a store over 30 consecutive days
28
32
46
33
39
40
47
53
56
40
44
21
38
62
57
48
36
22
53
34
24
29
32
38
18
37
46
36
37
45
1. Construct a group frequency distribution of the above data
comprising 6 classes of equal width. Let 15 be the lower limit of
the initial class
2. Use the grouped data...
The number of loaves of bread sold per day by an organic bakery over the past...
The number of loaves of bread sold per day by an organic bakery
over the past five years can be treated as a random variable that
is normally distributed. This distribution has a mean of 77.5 and a
standard deviation of 14.4 loaves. Suppose a random sample of 36
days has been selected. Determine the probability that the average
number of loaves sold in the sample of days exceeds 80 loaves.
First find the standard error of the mean.
Now...
A clothing store is open each day for 12 hours. On average, the store gets 120...
A clothing store is open each day for 12 hours. On average, the
store gets 120 customers per day. Round each answer below to the
nearest hundredth.
a. Find the probability that the store gets 140 or more
customers today.
b. Find the probability that the store gets 15 or more customers
in the first hour of business.
c. Find the probability that the store gets 40 or more customers
in the first three hours of business.
**Please show me...
Ichabod runs a clothing store in London. He recently purchased 1000 dress shirts that had a...
Ichabod runs a clothing store in London. He recently
purchased 1000 dress shirts that had a manufacturer’s list price of
$35. On each shirt there was a trade discount of 10%, 8% and 6%
from the manufacturer. Ichabod’s store has operating expenses that
are 35% of the selling price and rate of markup is 60% on selling
price.
a) He sold 400 shirts at the regular selling price. What was the
total revenue from the first 400 shirts sold?
b)...
A store sells three different clothing designs and has recorded sales of each over five different...
A store sells three different clothing designs and has recorded
sales of each over five different 24-hour periods:
Design
A Design
B Design C
16
33
23
18
31
27
19
37
21
17
29
28
13
34
25
Use the Kruskal-Wallis H test and the
Chi-Square table at the 0.05 level to compare the three
designs.
A store sells three different clothing designs and has recorded sales of each over five different...
A store sells three different clothing designs and has recorded
sales of each over five different 24-hour periods:
Design
A Design
B
Design C
16
33
23
18
31
27
19
37
21
17
29
28
13
34
25
Use the Kruskal-Wallis H test and the Chi-Square table at the
0.05 level to compare the three designs.
Table 1 below shows the number of lawn mowers sold by Mangi Enterprises over a period...
Table 1 below shows the number of lawn mowers sold by Mangi
Enterprises over a period of three years.
Table 1: Sales Data of Lawn Mowers
Jan
Feb
March
April
May
June
July
Aug
Sept
Oct
Nov
Dec
20016
238
220
195
245
345
380
270
220
280
120
110
85
2017
135
145
185
219
240
420
520
410
380
320
290
240
2018
205
230
340
370
395
505
540
500
402
360
310
280
REQUIRED:
Based on...
The quarterly sales data (number of copies sold) for a college textbook over the past three...
The quarterly sales data (number of copies sold) for a college
textbook over the past three years follow:
Year
Quarter
Sales
1
1
1690
2
940
3
2625
4
2500
2
1
1800
2
900
3
2900
4
2360
3
1
1850
2
1100
3
4
2930
2615
a. Construct a time series plot. What type of pattern exists in
the data?
b. Show the four‐quarter and centered moving average values for
this time series.
c. Compute the seasonal and...
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