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FrozenT [24]
3 years ago
7

You are conducting a left-tailed test of a claim about a population mean when sigma is unknown with a sample size of 7.

Mathematics
1 answer:
Artyom0805 [142]3 years ago
4 0
<h3>Answer:  -3.71</h3>

========================================================

Explanation:

You'll need to use a T table to answer this question. Your stats textbook should have such a table in the back appendix section.

If your textbook doesn't have the proper table, or you don't have your textbook with you, then I recommend searching online for "t table" and you should have tons of free options to choose from.

In the table you'll look for the degrees of freedom row 6, since the degrees of freedom are equal to n-1. In this case, n = 7.

In this row, locate the column labeled  "alpha = 0.005" and you'll be looking at "one tail". The value in this row and column is roughly 3.707

Since we're doing a left tailed test and we want P(t < C) = 0.005, where C is the critical value we're after. This must mean C < 0. So C = -3.707 approximately. Round this to two decimal places and we end up with -3.71

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What is the discriminant of 4n^2 - 7n +2 = 0?
Marina86 [1]
The discriminant is 2
3 0
3 years ago
Can you please show me your math so I know how you got it?
yan [13]
So the answer is 14 ounces
Explanation
Since 16.8 is the original plus 20% we could say 16.8=120%

And since X is the original we could say X=100
So using that info we could put it into a proportion
120/100=16.8/x or
120. 16.8
——=. ———-
100. X
Then we cross multiply and divide
So,
120x=16.8(100)
120x=1680 then divide both sides by 120
X=14


7 0
2 years ago
. Write an equation of the line that passes through the given points use point
Damm [24]

Answer:

y = \frac{1}{3}x+\frac{1}{3}

Step-by-step explanation:

First, we need to figure out a linear equation. When given two points - (x_{1}, y_{1})and (x_{2}, y_{2}) - first subtract y_{1} from y_{2} and and x_{1} from x_{2}. So in your situation, it will be 2-1 and 5-2. That equals 1 and 3, so your slope (how much the line moves up/down per unit) will be \frac{1}{3} x.

Next, we need to find the y-intercept. To solve using point-slope form, we will plug our numbers in:

y-y_{1} = m(x-x_{1})\\y-1=\frac{1}{3}(x-2)\\y-1=\frac{1}{3}x-\frac{2}{3}\\/+1=//+1\\y = \frac{1}{3}x+\frac{1}{3}

So our final equation is y = \frac{1}{3}x+\frac{1}{3}, which passes through both (2,1) and (5,2). Hope this helps :)

3 0
3 years ago
A rectangle and a triangle have the same area. If their bases are the same length's, how do their lives compare? Justify your an
kozerog [31]
Area of rectangle = l × b = height × base = bh
Area of traingle = ½bh'
Area of rectangle = Area of triangle (given)
bh = ½bh'
h' = 2h
It means that the height of the given triangle is double the height of the rectangle.
4 0
3 years ago
The value of a car is $30.000and depreciates at a rate of 6.5% each year.
zalisa [80]

find interest and subtract it from 30,000

7 0
3 years ago
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