Answer:
1/28 of the sack
Step-by-step explanation:
Answer:
a) Mean = 133, Standard deviation = 2.5
b) Normal distribution
c) 0.0026
Step-by-step explanation:
We are given the following in the question:
Sample size, n = 4
Mean = 133
Standard deviation = 5
a) Mean and the standard deviation of the sampling distribution of the sample mean for the four observations each day.
The sampling distribution has a mean equal to the population mean

The standard deviation of the sampling distribution is given by:

b) Shape of the sampling distribution
Central limit theorem:
When a large sample is drawn from a normal distribution, then the distribution of sample means approaches a normal distribution.
Since the distribution is normal, the sampling distribution of the sample mean will be bell shaped and follow a normal distribution.
c) P(sample mean exceeds 140)
Calculation the value from standard normal z table, we have,
0.0026 is the probability that the sample mean exceeds 140.
We know that pupils are students
Students = S
boys = B
Teachers = T
So....
S = 8T
Boys = 3G
T = B - 70
Since there is 8x students than teachers, I did Boys = 6x and girls = 2x
I'm going to use this next: S = 8T
8x = 8(B -70)
8x = 8(6x - 70)
8x = 4x - 560
x = 14
We know there is 8x students, so there are 112 students and we know that there is 1/8 of teachers, so there are 14 teachers.
Answer = 126.
[6.2x10^7]x[3x10^2]
=1.86x10^10
The hint is in the question. All you do is times the projection in 2030 with 1950 population.
Answer:
a)
Since t is between 0 and 15, and the house was purchased 8 years ago, we have two pairs of values:
- t = 0, V(0) = 42000
- t = 8, V(8) = 67500
<u>Find the slope, m:</u>
- m = (67500 - 42000)/8 = 3187.50
The value of b is 42000, since at t = 0, V = 42000
<u>So the equation is:</u>
b)
The graph is attached.
When V = 72500, t = 9.6 (approximately)
c)
When V = 74000
- 74000 = 3187.5t + 42000
- 3187.5t = 32000
- t = 32000/3187.5
- t ≈ 10 years (rounded down)
d)
When V = 80250
- 80250 = 3187.5t + 42000
- 3187.5t = 80250 - 42000
- 3187.5t = 38250
- t = 38250/3187.5
- t = 12 years