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
F(x)=1/2×+6 plz helpppppppppp​
FromTheMoon [43]

Answer:

The solution set can be given as:

\{x|x\ \epsilon\ R,x\neq -3\}

Step-by-step explanation:

Given function:

f(x)=\frac{1}{2x+6}

To find the domain of the function in set notation.

Solution:

For the function f(x) to exist the denominator must be ≠ 0

We have the denominator (2x+6) which  cannot be = 0.

Thus, we can find the domain of the function using the above relation.

The function f(x) will not exist when:

2x+6=0

Solving for x

Subtracting both sides by 6.

2x+6-6=0-6

2x=-6

Dividing both sides by 2.

\frac{2x}{2}=\frac{-6}{2}

∴ x=-3

Thus, the function will not exist at x=-3. This means it has all real number solutions except -3.

The solution set can be given as:

\{x|x\ \epsilon\ R,x\neq -3\}

3 0
3 years ago
What is the value of 6<br> 364<br> 484<br> 1.365<br> 1.456
vlabodo [156]

Answer:

I think it is C

Step-by-step explanation:

If I'm wrong try B

4 0
3 years ago
Which is a simplified form of the expression 6(2t – 3) + 3(t + 5)?
faust18 [17]

Answer:

it's option D.

Step-by-step explanation:

see attachment in case u need steps

8 0
3 years ago
Read 2 more answers
Melissa earns 7.25% commission on everything she sells at the electronics store where she works. She also earns a base salary of
Gnoma [55]
.725 multiplied by 4500=362.5
750+3262.5=4012.5
8 0
3 years ago
An electrician charges a rate of $60 per hour plus a fee of $35 per job. Which expression represents the electrician's hourly ra
miskamm [114]

The hourly rate is 60, so multiply 60 by the number of hours (h) and add the fee:

Answer: 60h + 35

5 0
2 years ago
Other questions:
  • Write 2 mixed numbers where the lcd is 12,but the product of the denominators is not 12
    5·1 answer
  • Una makes $64 a week, plus 15 percent of the cost of meals that she serves. Use the
    10·2 answers
  • At a state park, 3 children and 5 adults paid a total of $68 for their entrance fees, whereas 4 children and 2 adults paid
    8·2 answers
  • Help pls I need it now
    15·1 answer
  • The intersecting plane is parallel to the base below. What is the cross section?
    12·2 answers
  • If point P is Four-sevenths of the distance from M to N, what ratio does the point P partition the directed line segment from M
    14·2 answers
  • On Saturday, the Anderson
    11·1 answer
  • Tina conducted a survey to find the favorite weekend activity of the people in her state. She asked 10 of her neighbors what the
    7·2 answers
  • 12 more than janelle's score is 74
    6·2 answers
  • The graph of a quadratic function with vertex (-3,1) is shown in the figure below. Find the range and the domain
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!