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bekas [8.4K]
2 years ago
12

What is the value of a in this function's equation? A. -1 B. 1 C. 2 D. -2

Mathematics
1 answer:
Pavlova-9 [17]2 years ago
7 0
B is the correct answer !!!!
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Crop researchers plant 15 plots with a new variety of corn. The yields in bushels per acre are: 138.0 139.1 113.0 132.5 140.7 10
son4ous [18]
There is a relationship between confidence interval and standard deviation:
\theta=\overline{x} \pm \frac{z\sigma}{\sqrt{n}}
Where \overline{x} is the mean, \sigma is standard deviation, and n is number of data points.
Every confidence interval has associated z value. This can be found online.
We need to find the standard deviation first: 
\sigma=\sqrt{\frac{\sum(x-\overline{x})^2}{n}
When we do all the calculations we find that:
\overline{x}=123.8\\ \sigma=11.84
Now we can find confidence intervals:
($90\%,z=1.645): \theta=123.8 \pm \frac{1.645\cdot 11.84}{\sqrt{15}}=123.8 \pm5.0\\($95\%,z=1.960): \theta=123.8 \pm \frac{1.960\cdot 11.84}{\sqrt{15}}=123.8 \pm 5.99\\ ($99\%,z=2.576): \theta=123.8 \pm \frac{2.576\cdot 11.84}{\sqrt{15}}=123.8 \pm 7.87\\
We can see that as confidence interval increases so does the error margin. Z values accociated with each confidence intreval also get bigger as confidence interval increases.
Here is the link to the spreadsheet with standard deviation calculation:
https://docs.google.com/spreadsheets/d/1pnsJIrM_lmQKAGRJvduiHzjg9mYvLgpsCqCoGYvR5Us/edit?usp=sharing
6 0
3 years ago
SOMEONE ANSWER THESE PLEASE!!
Svetradugi [14.3K]
Answer:
1). Because whole number doesn’t allow decimal numbers.

2). Because whole number doesn’t allow negative numbers. It starts with 0, 1, 2, 3....
7 0
3 years ago
Epress 4+3i/3-4i in form of a + bi .evaluate your final answer raised to power 6​
VashaNatasha [74]

Answer:(a) Express the complex number (4 −3i)3 in the form a + bi. (b) Express the below complex number in the form a + bi. 4 + 3i i (5 − 6i) (c) Consider the following matrix. A = 2 + 3i 1 + 4i 3 − 3i 1 − 3i Let B = A−1. Find b22 (i.e., find the entry in row 2, column 2 of A−1)

Step-by-step explanation:

7 0
2 years ago
Which statement best explains the relationship between numbers divisible by 9
AVprozaik [17]

Answer:

Step-by-step explanation:

A number divisible by 9 is also divisible by 3  because 3 is a factor of 9.

4 0
3 years ago
Solve for y. <br><br> y-260=-11/5*(x-60)
Otrada [13]

its -325

:3

hope this helped gooooood luck ;3

7 0
3 years ago
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