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tekilochka [14]
3 years ago
14

I need help with homework pls

Mathematics
1 answer:
alina1380 [7]3 years ago
7 0
Text me for your help
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When sampling without replacement from a finite population of size N, the following formula is used to find the standard deviati
nirvana33 [79]

Answer:

Check below for the required explanations

Step-by-step explanation:

The population correction factor is given by the formula :

PCF = [(N-n)/(N-1)]^1/2..........(1)

a) When the sample size is smaller than 5% of N. That is n < 0.05N

If n = 0.05N is substituted into the PCF formula, PCF will be approximately 1.

For a value of 1, PCF can be safely ignored.

b) N = 200

i) n = 10% N

n = 0.1 × 200 = 20

Substitute n = 20 into equation (1)

PCF = (200-20)/(200-1)]^1/2

PCF = 0.95

ii) n = 5% N

n = 0.05× 200 = 10

Substitute n = 20 into equation (1)

PCF = (200-10)/(200-1)]^1/2

PCF = 0.98

iii) i) n = 3% N

n = 0.03 × 200 = 6

Substitute n = 20 into equation (1)

PCF = (200-6)/(200-1)]^1/2

PCF = 0.99

iiii) n = 1% N

n = 0.01 × 200 = 2

Substitute n = 20 into equation (1)

PCF = (200-2)/(200-1)]^1/2

PCF = 0.998(approx. =1)

It is noticed that the smaller the sample size, the closer the population correction factor to unity. At 1% of the population, the population correction factor is negligible

5 0
3 years ago
100 PTS TO THE FIRST PERSON WHO ANSWERS IT CORRECTLY
torisob [31]

Step-by-step explanation:

the point coordinates at the end of their flights are

x = cos(angle) × distance

y = sin(angle) × distance

remember, cosine is on the x-axis (left and right values), sine is on the y-axis (up and down values).

and the values of sine and cosine are standard for the norm circle with radius = 1.

but in such cases the radius is much larger that 1, and we have to multiply it with the trigonometric functions for scaling reasons.

the radius is always the angled connection from the center of the circle to the point on the arc of the circle. in our cases the travel distances of the shuttles.

so, if we consider the central staffing point as (0, 0), they end up at the following coordinates :

the inner (lower) angle for Mr. Scotts trip is

90-30 = 60°

and his coordinates are

(cos(60)×100, sin(60)×100) =

= (0.5×100, 86.60254038...) = (50, 86.60254038...)

the inner (lower) angle for Mr. Spock's trip is

90-62 = 28°

and his coordinates are

(cos(28)×110, sin(28)×110) =

= (97.12423521..., 51.64187191...)

the distance between these 2 points is

distance² = (Spockx - Scottx)² + (Spocky - Scotty)² =

= (47.12423521...)² + (-34.96066847...)² =

= 2,220.693545... + 1,222.24834... =

= 3,442.941885...

distance = 58.67658719... km

4 0
2 years ago
State whether the indicated angle pairs are adjacent or not. An explanation would be nice, but you don't have to.
Valentin [98]

1. Yes, angles a and b have a common vertex (starting point) and a common side (the line between angle a and b). They do not overlap.

2. No, angles a and b share a common vertex but not a common side.

3. No. Same as above.

4. Yes, anlges a and b share a common vertex and side.

6 0
3 years ago
A rectangular box is twice as long as it is wide and twice as wide as it is high. The sum of its length,
seraphim [82]

Answer:

ok so the

the length is 20

the width is 10

the height is 5

Step-by-step explanation:

ok i got this by guess and check

twice as long as it is wide so i am saying that it is 10 wide so it would be 20 long and if it is twice as wide as it is tall then it is 5 because 10/2=5

20+10+5=35

8 0
3 years ago
You worked from 2:30pm - 8:45pm with a 1/2 hour lunch break your hourly wage is $7.50/hour how much did you earn
levacccp [35]
Find out how many hours you worked first.

2:30 pm-8:45 => 6:15 hours

But they say that you take a break of 1/2 hour 

6:15- 0:30= 5:45 hours 

Convert all the data into hours. 5 hours + 45/60 hours 

Multiply data with given hourly wage. 

5x$7.50=$37.5 

(45/60)x7.50=$5.625 

In total, you earn (37.5+5.625)=> $43.125

Hope I helped :) 
3 0
3 years ago
Read 2 more answers
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