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kow [346]
3 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]3 years ago
5 0

Answer:

15 11

Step-by-step explanation:

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4321342345670<br> +22347968
Ad libitum [116K]

the Answer is

4.3213647e+12

3 0
3 years ago
tyler sells candy and popcorn. Altogether he sold 15 items. He sells candy for $2 and pop corn $4 and eanred $36. How much candy
9966 [12]

Answer:

candy= 11 popcorn=4

Step-by-step explanation:

11x2=22

4x4=16

16+22=36

8 0
3 years ago
a company declared a dividend of $1.50 per share. john has 600 shares in the company. how much will she get?​
Harman [31]

Answer:

$900

Step-by-step explanation:

So if each individual share is $1.50 we can presume that we need to multiply both factors. 1 x 600 is 600 and .50 x 600 is 300. 600 + 300 = 900. John will get $900 in shares profit.

3 0
3 years ago
Solve the equation: 15=2y-5
Arisa [49]

Answer:

2 times 10 - 5 equals 15

Step-by-step explanation:

hope that helps

8 0
3 years ago
Read 2 more answers
a quantity of ethanol is cooled from 47.9° C to 12.3°C and releases 3.12 KJ of heat. what is the mass of the ethanol sample?​
victus00 [196]

Answer:

35.9 grams

Step-by-step explanation:

We use the formula:

q=m*C_p*\Delta T

Where

q is heat released

m is mass

C_p is the constant 2.44

ΔT is change in temperature

We put the info in the formula and solve for m (mass):

q=m*C_p*\Delta T\\-3.12 =  m*2.44(12.3-47.9)\\-3.12*10^3=m*(-86.864)\\m=35.9

The mass of ethanol is 35.9 grams

8 0
4 years ago
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