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krek1111 [17]
3 years ago
5

In constructing a confidence interval estimate for a population mean, when we replace S with the sample standard deviation (s),

we introduce a new source of variability and the sampling distribution we use is:A. the normal distribution B. F- distribution C. chi-square distribution D. t -distribution
Mathematics
1 answer:
Akimi4 [234]3 years ago
7 0

Answer:

D

Step-by-step explanation:

When the population standard deviation is unknown while constructing the confidence interval then the estimate of standard deviation calculated from sample is used and due to this the new type of variability arise and then for conducting a confidence interval for mean the t-distribution is used. For calculating confidence interval for mean there are two sampling distributions z distribution and t distribution. When sample size is small and population standard deviation is unknown then t-distribution is used.  

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I don't understand this. please help me, much appreciated !!
nevsk [136]

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3 0
3 years ago
Gary is planning to make 7 cuts in a loaf of bread
Roman55 [17]
Then he has eight slices
8 0
3 years ago
Read 2 more answers
3=g/-4-5 <br> solve for g
devlian [24]

Answer:

4

Step-by-step explanation:

so first you write down the problem and substitute the g by 3 after that you subtract

3 - 4 = 1 - 5 = 4

3 0
3 years ago
The vertices of a triangle are A(0,0),B(3,8) and C(9,0). What is the area of this triangle?
Svetradugi [14.3K]

Answer:

9

Step-by-step explanation:

To find the area of a triangle where you know the x and y coordinates of the three vertices, you'll need to use the coordinate geometry formula: area = the absolute value of Ax(By - Cy) + Bx(Cy - Ay) + Cx(Ay - By) divided by 2. Ax and Ay are the x and y coordinates for the vertex of A. The same applies for the x and y notations of the B and C vertices.

Fill in the numbers for each corresponding letter combination within the formula.

Fill in your formula like this: 0(8-10) + 3(0-0) + 9(0-8).

Subtract the numbers within the parentheses.

0 from 8 = 8, 0 from 0 = 0 and 8 from 10 = 2.

Multiply that result by the number to the left of the parentheses.

0 by 8 = 0, 3 by 0 = 0 and 9 by 2 = 18.

Add the three products together.

0 + 0 + 18 = 18

Divide the sum of the three products by 2.

18 ÷ 2 = 9

5 0
2 years ago
7x=2x-35<br><br><br> A. 7<br><br> B.5<br><br><br> C.-5<br><br><br> D.-7
Serhud [2]
Find x you mean?
substract both side by 2x
5x=-35
divide both side by 5
x=-7
->D
3 0
3 years ago
Read 2 more answers
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