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
kow [346]
2 years ago
11

The management of a supermarket wants to find if there is a relationship between the number of times a specific product is promo

ted on the intercom system in the store and the number of units of that product sold. To experiment the management selected a product and promoted it on the intercom system for seven days. The following table gives the number of times this product was promoted each day and the number of units sold.
Number of Promotions per Day Number of Units Sold per Day (hundreds)
15 11
22 22
42 30
30 26
18 17
12 15
38 23
a) With the number of promotions as an independent variable and the number of units sold as the dependent variable determine the least squares regression line. Give the equation of the line.
b) Compute r and r2. Explain their meaning.
c) Predict the number of units of this product sold on a day with 35 promotions.
d) Construct a 98% confidence interval for \beta .
e) Test at the 1% significant level that \beta is \beta \neq 0.
Mathematics
1 answer:
Degger [83]2 years ago
5 0

Answer:

15 11

Step-by-step explanation:

You might be interested in
Assume that adults have iq scores that are normally distributed with a mean of 100100 and a standard deviation of 15. find the t
anastassius [24]
The bell curve attached below shows the normal distribution of the data.

We are looking the value of X such as the area to its left gives the probability of 0.75

We first need the z-score which we can obtain by reading from the z-table (as shown in the second picture below)

The z-score is = 0.7734

Then we use the following formula to work out X
z-score = (X - Mean) ÷ Standard Deviation
0.7734 = (X - 100) ÷ 15
0.7734×15 = X - 100
11.601 = X - 100
X = 11.601 + 100
X = 111.601 ≈ 112 

Hence the third quartile is 112

4 0
2 years ago
What's the single exponent for K^8 x K^9
gregori [183]
K^8 • K^9 = K^(8+9) = K^17
3 0
3 years ago
Given sin B = .88 find angle B in radians. Round your answer to the nearest hundredth.
ELEN [110]

Use the inverse sine function on a calculator.


arcsin (0.88) = 1.08 radians

6 0
3 years ago
Tina has eight packs of paper each of her packs contain 50 sheets. Caz has three packs of paper each of his packs contain 125 sh
Vesna [10]

Answer:

i think the question is incomplete but

Tina at an average contains each package of

50 sheets ÷ 8 pack

6.205 of sheet in each pack

125 sheets ÷ 3 packs

caz contain at average 41.60 sheet average

but where the juan packs of paper that's why question is incomplete

7 0
2 years ago
Kevin is driving a truck filled with mulch. The mulch is packed in a container 20 feet long, 15 feet wide, and 12 feet tall. If
Ainat [17]

Answer:

20160 pounds

Step-by-step explanation:

20 * 15 * 12 = 3600 feet^3 = Volume

3600 feet^3 * 5.6 pounds = 20160 lbs

3 0
2 years ago
Read 2 more answers
Other questions:
  • Find the indicated angle measures. ok last one i promise y’all pls help-
    8·1 answer
  • Use the multiplier method to decrease £56 by 14%
    7·1 answer
  • 3 tickets to the museum cost 12.75 at this rate what is the cost of 1ticket
    11·2 answers
  • the perimeter of a rectangle is twice the sum of its length and its width. The perimeter is 16 meters and its length is 2 meters
    7·2 answers
  • HIGH SCHOOL LEVEL) <br>SUPER EASY I JUST AM DUMB, PLEASE HELP
    8·1 answer
  • Consider rolling dice and getting a total of 8. Find the probability if two dice are rolled. (Enter the value of probability in
    6·1 answer
  • Mrs. Babin put a border around a 5-foot by 6-foot rectangular bulletin board. How
    7·2 answers
  • How r u doing?? 1-10:D? (free pts btw)
    11·1 answer
  • A hose can be used to fill a swimming pool with water at a rate of 4 inches per hour.
    7·1 answer
  • Determine the amplitude of the following graph.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!