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hoa [83]
2 years ago
12

Daniela recorded the low temperatures during the school day last week and this week. Her results are shown in the table below. L

ow Temperatures during the School Day This Week and Last Week Low Temperatures This Week (mc015-1.jpg) 42 38 45 46 39 Low Temperatures Last Week (mc015-2.jpg) 56 58 52 62 62 Daniela used the steps below to find a relationship between the difference in the mean temperatures and the mean absolute deviations of the data sets. This Week Last Week Step 1 Find the mean. mc015-3.jpg Find the mean. mc015-4.jpg Step 2 Find the mean absolute deviation. mc015-5.jpg Find the mean absolute deviation. mc015-6.jpg Step 3 Find the ratio of the differences of the means compared to the mean absolute deviation. mc015-7.jpg Find the ratio of the differences of the means compared to the mean absolute deviation. mc015-8.jpg Step 4 The difference in the means is about mc015-9.jpg times the mean absolute deviations. In which step did Daniela make the first error
Mathematics
2 answers:
AleksAgata [21]2 years ago
7 0
Daniela made her error on step 3 because it says: <span>
<span>"Find the ratio of the differences of the means compared to the mean absolute deviation.
</span><span>
She didn't find the difference between the today and last week means. She just put the mean as a whole.</span></span>
liberstina [14]2 years ago
7 0
<span> Daniela recorded the low temperatures during the school day last week and this week. Her results are shown in the table below. Low Temperatures during the School Day This Week and Last Week Low Temperatures This Week (mc015-1.jpg) 42 38 45 46 39 Low Temperatures Last Week (mc015-2.jpg) 56 58 52 62 62 Daniela used the steps below to find a relationship between the difference in the mean temperatures and the mean absolute deviations of the data sets. This Week Last Week Step 1 Find the mean. mc015-3.jpg Find the mean. mc015-4.jpg Step 2 Find the mean absolute deviation. mc015-5.jpg Find the mean absolute deviation. mc015-6.jpg Step 3 Find the ratio of the differences of the means compared to the mean absolute deviation. mc015-7.jpg Find the ratio of the differences of the means compared to the mean absolute deviation. mc015-8.jpg Step 4 The difference in the means is about mc015-9.jpg times the mean absolute deviations. In which step did Daniela make the first error? well lets get to it so step 3 was  an error because 58 cant go into 15 so your final answer is step 3 have an amazing day all of you

</span>
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harriet is cultivating a strain of bacteria has doubled by the end of every second hour. how many bacteria will harriet have in
Black_prince [1.1K]

Answer:

n2^3 bacteria, n being the initial population.

Step-by-step explanation:

compound growth equation: P=n2^t

P is total population

n is initial population

t is time

since it doubles every second hour, and there are 6 hours

6hours/2hours= doubles 3 times, thats why t=3.

7 0
2 years ago
Suppose that f is a sine function ... look at the picture
Triss [41]

Answer:

f(3π/4) = -π

A = π

b = 2

Step-by-step explanation:

Given that the function follows the form: f(x) = A sin(bx), then f(0) = 0. Given that the period is π, then at x = π/4 the function reaches a maimum, at x = π/2, f(x) = 0, and at x = 3π/4, f(x) reaches a minimum, which have to be π*(-1) = -π

Given the general equation: f(x) = A sin(bx), its period is calculated as:

period = 2π/b

which is equal to π, then:

2π/b = π

b = 2

Replacing x = π/4 into the equation of the function, we get:

A sin(2(π/4)) = π

A sin(π/2) = π

A = π

8 0
3 years ago
(04.03 MC)
Vlad1618 [11]

Answer:

x = -2 and y = 3

{y = -3 x - 3, y = (3 x)/4 + 9/2} = x = -2 and y = 3

Step-by-step explanation:

Solve the following system:

{6 x + 2 y = -6

3 x - 4 y = -18

Express the system in matrix form:

(6 | 2

3 | -4)(x

y) = (-6

-18)

Solve the system with Cramer's rule:

x = -6 | 2

-18 | -4/6 | 2

3 | -4 and y = 6 | -6

3 | -18/6 | 2

3 | -4

Evaluate the determinant 6 | 2

3 | -4 = -30:

x = -6 | 2

-18 | -4/(-30) and y = 6 | -6

3 | -18/(-30)

Simplify -6 | 2

-18 | -4/(-30):

x = -1/30 -6 | 2

-18 | -4 and y = 6 | -6

3 | -18/(-30)

Simplify 6 | -6

3 | -18/(-30):

x = -(-6 | 2

-18 | -4)/30 and y = -1/30 6 | -6

3 | -18

Evaluate the determinant -6 | 2

-18 | -4 = 60:

x = (-1)/30×60 and y = -(6 | -6

3 | -18)/30

(-1)/30×60 = -2:

x = -2 and y = -(6 | -6

3 | -18)/30

Evaluate the determinant 6 | -6

3 | -18 = -90:

x = -2 and y = (-1)/30×-90

(-1)/30 (-90) = 3:

Answer: x = -2 and y = 3

___________________________________________

Solve the following system:

{y = -3 x - 3

y = (3 x)/4 + 9/2

Express the system in standard form:

{3 x + y = -3

-(3 x)/4 + y = 9/2

Express the system in matrix form:

(3 | 1

-3/4 | 1)(x

y) = (-3

9/2)

Write the system in augmented matrix form and use Gaussian elimination:

(3 | 1 | -3

-3/4 | 1 | 9/2)

Add 1/4 × (row 1) to row 2:

(3 | 1 | -3

0 | 5/4 | 15/4)

Multiply row 2 by 4/5:

(3 | 1 | -3

0 | 1 | 3)

Subtract row 2 from row 1:

(3 | 0 | -6

0 | 1 | 3)

Divide row 1 by 3:

(1 | 0 | -2

0 | 1 | 3)

Collect results:

Answer:  {x = -2 , y = 3

5 0
2 years ago
A nonprofit organization sent mailing labels along with a request for donations to a random sample of 75,000 potential donors on
Law Incorporation [45]

Answer:

Check the explanation

Step-by-step explanation:

The null and alternative hypotheses in symbols and words are as follows:

: p ≤ 0.06 (There has been no change in the contribution rate due to addition of the mailing labels)

: p > 0.06 (The addition of the mailing labels has increased the contribution rate)

Test Statistics

The following information is provided: The sample size is N = 75000, the number of favorable cases is X = 5625, and the sample

The z-statistic is computed as follows:

- P_0 (1 -

Test statistic z = 17.297

P-value

P-value corresponding to z = 17.297 for a two tailed test is obtained using standard normal table.

p-value = 0.0000

90% Confidence Interval Calculation

Kindly check the attached image below.

Conclusion

Since p-value = 0.0000 < α = 0.05, we reject null hypothesis .

At 0.05 significance level, there is enough evidence to conclude that the addition of the mailing labels has increased the contribution rate.

Since the 90% confidence interval (0.073, 0.077) does not contain the hypothesized value 0.06, the result is significant and we reject null hypothesis.

In other words, at 0.10 significance level, there is enough evidence to conclude that the addition of the mailing labels has increased the contribution rate.

4 0
3 years ago
Carrie has 0.83 liters of juice in her pitcher. Sanji's pitcher has 2 times as much juice as Carrie's pitcher. Lee's pitcher has
Scorpion4ik [409]
4.38 liters of juice I think..
5 0
3 years ago
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