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Marizza181 [45]
3 years ago
14

Researchers are conducting a study in an attempt to establish a linear relationship between the number of online music video vie

ws and the number of guitar sales. A computer output for regression is shown and is based on a sample of seven observations. Predictor Coeff St. Dev t Ratio p-Value Constant 7.85671094 1.316226455 5.969118 0.001889 Music Video Views 0.094781123 0.027926367 3.393965 0.019378 What represents the 99% confidence interval for the slope of the regression line?
a. 0.0948 ± 3.499(1.3162)

b. 0.0948 ± 4.032(1.3162)

c. 0.0948 ± 3.707(0.0279)

d. 0.0948 ± 4.032(0.0279)
Mathematics
1 answer:
Charra [1.4K]3 years ago
3 0

Answer:

d. 0.0948 ± 4.032(0.0279)

Step-by-step explanation:

A 99% confidence interval for the coefficient of promotional expenditures is, First, compute the t critical value then find confidence interval.

The t critical value for the 99% confidence interval is,  

The sample size is small and two-tailed test. Look in the column headed es = 0.01 and the row headed in the t distribution table by using degree of freedom is here

for (n-2=5) degree of freedom and 99% confidence ; critical t =4.032

therefore 99% confidence interval for the slope =estimated slope -/+ t*Std error

= 0.094781123 -/+ 4.032* 0.027926367 = -0.017822 to 0.207384

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Six men completed a task in 24 hrs and 48 min. How long, in hours and minutes, would it take four men to complete the same task?
igor_vitrenko [27]

Answer:

It would take 4 men 37 hrs and 12 mins to complete the same task.

step-by-step explanation:

Let X be the time the four men would use to complete the task.

From the question, 6 men completed a task in 24 hrs and 48 mins

But

24 \: hrs \: 48 \: mins = 24(60mins) + 48 \: mins=1488 \: mins

Using ratio and proportion

6 \: men:1488 \: mins

4  men:x\:mins

if more, less divides and if less, more divides.

4 men required more time to complete the task

Hence:

x =  \frac{6}{4} \times 1488 \: mins

x = 2232 \: mins

x = 37 hrs 12 mins

5 0
3 years ago
4 x eight tenths multiply write the product as a mixed number.
mina [271]
4 times 8 tenths
1/10=1 tenth
8/10=8 tenths

4 times 8/10
4/1 times 8/10
(4 times 8)/(1 times 10)
32/10
16/5
5/5+5/5+5/5+1/5
1+1+1+1/5
3+1/5
3 and 1/5
5 0
3 years ago
Read 2 more answers
In the magic square shown, the sums of the numbers in each row, column and diagonal are the same. What are the values of x, y, z
garri49 [273]
v=23, w=19, x=22, y=26, z=20;; to find the answer, set the expressions equal to each other, since the sum of the numbers should be the same.

Use v+w+24=v+43 and solve for w, which would result in w=19.

You can also use x+z+24=z+46 to find x– or x=22.

Plug in the values for x and w, and find y using 25+22+19=y+40 or 66=y+40 and results in y=26.

After plugging in the y value, you can easily find v and z.

v+18+25=66– since 66 is the sum of a full row, and the sums of the numbers in each row, column, and diagonal are the same, so therefore, v+43 should also equal 66. This results in v=23, and, using the same value for the sum of z+21+25, or z+46=66, we find that z=20.

The final answer is v=23, w=19, x=22, y=26, z=20.

Sorry it took so long;; I hope this helps :)
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4 years ago
Kaitlin runs each lap in 7 minutes. She will run more than 8 laps today. What are the possible numbers of minutes she will run t
ivolga24 [154]

Answer:

if she runs more than 8 laps and each lap is 7 minutes she will run more than 56 minutes

she will run 56 minutes t

6 0
3 years ago
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zloy xaker [14]

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Now, you have to find two numbers whose sum would be 33/10.

Try to fix the denominator, and change numerator...like

it would be 13/10 + 20/10 or 15/10 + 18/10.Ok..

You can do your 6th ques. in same manner.

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8 0
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