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andrew11 [14]
3 years ago
6

In a random sample of 1,000 exams, the average score was 500 points with a standard deviation of 80 points.

Mathematics
1 answer:
bagirrra123 [75]3 years ago
5 0
90% c.I. is given by







You might be interested in
90 dollars ratio in 1:2:3
Mnenie [13.5K]

Answer:

3:6:9

Step-by-step explanation:

1/1+2+3 × 90 = 15

2/1+2+3 × 90 = 30

3/1+2+3 × 90 = 45

8 0
3 years ago
A gardener has 27 pansies and 36 daisies he ants an equal number of each type of flower in each row what is the greatest possibl
Komok [63]
There are 27 pansies.
The possible rows that will contain equal numbers of pansies are
1 row, 27 pansies in the row, or
3 rows, 9 pansies per row, or
9 rows, 3 pansies per row.

There are 36 daisies.
The possible rows that will contain equal numbers of daisies are
1 row, 36 daisies in the row,
2 rows, 18 daisies per row, or
3 rows, 12 daisies per row, or
4 rows, 9 daisies per row, or
6 rows, 6  daisies per row, or
9 rows, 4  daisies per row, or
12 rows, 3 daisies per row, or
18  rows, 2 daisies per row.

The only common row combination is 3 rows, with 9 pansies and 12 daisies per row.

Answer:  9 pansies in each row.
5 0
4 years ago
Graph both functions to find the solution(s) to the system.
BaLLatris [955]

   <span> f(2) = 2×2 − 1 = 3</span>

The point of intersection is (2, 3).

The example shows that we can find the point of intersection in two ways.
Either graphically, by drawing the two graphs in the same coordinate system, or algebraically by solving the equation such as the one in the above example.

<span>Solving an equation graphically is easy with a graphical calculator or a computer program such as Excel.
Some equations cannot be solved algebraically but we can find solutions that are correct to as many significant figures as we want by using computers and calculators</span>
6 0
3 years ago
Help triangle sum therom and idk what to do
m_a_m_a [10]
Your answer would be x = 12

The triangle sum theorem states that the 3 angles in a triangle equal 180.

Since we have a 90 degree angle shown, we can add it to the other two and set it equal to 180.

30+90+6x-12=180
108+6x=180
6x=72
x=12
5 0
3 years ago
Doris is investigating if height has any effect on red blood cell count. What is the explanatory variable?
sammy [17]

Answer:

a) The number of people that are being studied.

Step-by-step explanation:

1) The (missing) options are:

a) The number of people that are being studied.

b) red blood cell count

c) height

d) none of the above

2) Explanatory variables are synonymical terms for independent variables.

In short when those variables are really not affected by other ones they are also called Explanatory Variables.

It is useful to make a distinction between response variable, and explanatory ones. The first one is affected somehow and it is the response Doris wants to find out.

3) Certainly, the sample or population of this research is absolutely free of prior influence over the final results.  Since theoretically, the same research can be done over different samples and find other responses.

Then it's "a"

5 0
4 years ago
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