Answer:
C
Step-by-step explanation:
In the graph it's curved, which is not linear, but the other lines are all straight.
Answer:
144
Step-by-step explanation:
The ratio of men to women working for a company is 8 to 5.
Total men and women working as per the ratio is 8+5 = 13
So the ratio of men to total is
the ratio of women to total is
there are 234 employees total
To find the number of men works , we make a proportion
Cross multiply it
8 * 234 = 13x
1872 = 13x
Divide by 13 on both sides
x= 144
Answer:
a. 250 fields
b. 220 to 280 fields
c. Fields are not independent
Step-by-step explanation:
a. The average number of fields sampled that are infested with whitefly =
number of fields X Percentage sampled, 10%
= 2500 X 10% = 250 fields
b. Going by the binomial distribution is the square of the standard deviation, divided by (the product of the sample size n, and the probability a and b). While the standard deviation is the square root of the variance
σ = √nab
= √na(1-a) = √2500 X 10% X (1- 10%)
= √225 = 15
Now let's use the empirical rule that says about 95% of the observations are within two standard deviations from the mean since the number of trials is very large
μ - 2σ = 250 - 2(15) = 220
μ + 2σ = 250 + 2(15) = 280
Approximately 220 to 280 fields are expected to be infested going by 95% probability observation
c. Since x=25 is considered small and is not captured within 220 and 280 fields making one of the characteristics of binomial experiment not satisfied which expects each field to be independent. Making fields that are close together more likely to be infected.
Have a look at the attached image.
