1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
GalinKa [24]
2 years ago
9

Pharmex is a chain of drugstores that operate around the country. To see how effective its advertising and other promotional act

ivities are, the company has collected data from 50 randomly selected metropolitan regions. In each region, it has compared its own promotional expenditures and sales to those of the leading competitor in the region over the past year. There are two variables: "Promote" reflects Pharmex’s promotional expenditures as a percentage of those of the leading competitor, and "Sales" reflects Pharmex’s sales as a percentage of those of the leading competitor. A portion of the data appears below. Show all work.
Region Promote Sales Region Promote Sales Region Promot Sales
1 77 85 21 103 112 41 100 94
2 110 103 22 95 96 42 96 81
3 110 102 23 103 93 43 88 92
4 93 109 24 89 97 44 109 108
5 90 85 25 97 92 45 109 103
a. Using Excel, create a scatterplot of the data. What do you observe? What type of relationship, if any, is apparent from the scatterplot?
b. Insert a trendline (click on the scatterplot, then click the Layout tab, and choose Trendline). What type of trendline seems to fit best?
c. Under "More Trendline Options," select "Display Equation on chart" and "Display R-squared value on chart." What do you see? What do these numbers mean?
Mathematics
1 answer:
kakasveta [241]2 years ago
6 0

Answer:

Positive relationship exists

Linear trend line

R² = 0.3522

Step-by-step explanation:

Given the data :

Promote (X) :

77

110

110

93

90

103

95

103

89

97

100

96

88

109

109

Sales (Y) :

85

103

102

109

85

112

96

93

97

92

94

81

92

108

103

A.) From the resulting plot, tbe slope of the graph is positive, hence, we can conclude that there exist a positive relationship between the variables 'promote' and 'sale'.

The linear trend line gives the best fit for the data with a correlation Coefficient, R value of 0.5935

The R² value is 0.3522. R² is the Coefficient of determination which gives the percentage of explained variation. For this data, about 35% of variation in sales is given by the best fit line.

You might be interested in
for a class gardening project 1/3 of mrs gordon's students planted marigolds and 1/2 planted tulips what fraction of the class p
vladimir2022 [97]
Get them to have a common denominator so you can add them
(1/3)×2= 2/6 and (1/2)×3= 3/6
Add them together
(2/6)+ (3/6)= 5/6
So 5/6 of the class planted either marigolds or tulips and 1/6 of the class planted neither
5 0
3 years ago
I really need help it looks simple but i have no clue please helpppp no links :((
Alexus [3.1K]

Answer:

420 in³

Step-by-step explanation:

14 x 10 x 3 = 420

5 0
3 years ago
Read 2 more answers
Can someone help me with this question ASAP
sattari [20]
Let m be the slope:

m=(y₂-y₁)/(x₂-x₁)

solve for c:

1/6=(9-c)/(1-7)

1/6=(9-c)/-6

-1=9-c

-10=-c

c=10
3 0
3 years ago
What is the reciprocal of –4? <br> 4<br><br><br><br><br><br> 1
stepan [7]
-4/1 is the reciprocal
7 0
3 years ago
Read 2 more answers
The set of life spans of an appliance is normally distributed with a mean mc013-1.jpg = 48 months and a standard deviation mc013
elena55 [62]
The life span would be 24 months.

The formula for z-scores is:
z=\frac{X-\mu}{\sigma}

Using the information we're given we have:
-3=\frac{X-48}{8}

Multiply both sides by 8 to cancel it:
-3(8) = ((X-48)/8)*8
-24 = X-48

Add 48 to both sides:
-24+48 = X-48+48
24=X
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which set of ordered pairs could be generated by an exponential function? A)(negative 1, negative one-half), (0, 0), (1, one-hal
    8·2 answers
  • Joachim wants to win the giant monkey at the carnival game. To do so, he'll need to roll two ones with a single toss of a pair o
    8·2 answers
  • Olivia scored 82 points on her first math test of the year.On the second math test she scored 78 points. What is the percent of
    13·1 answer
  • Which of the following is a rational number?<br> 97, 98, 99, 100
    6·1 answer
  • Of the two bottles shown of sunblock shown, which is the better buy? Explain. Sunblock 1: 4 ounce bottle $8.49 Sunblock 2: 5 oun
    9·1 answer
  • Angle a is one ninth as large as its complement angle b
    7·1 answer
  • Help pleas
    12·1 answer
  • [PICTURE ATTACHED] HEELPP!
    9·2 answers
  • Quadrilateral RUST has a vertex at R(2, 4).
    10·1 answer
  • HELP ASAP
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!