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.
Answer:
1 1/12
Step-by-step explanation:
1/4=3/12
5/6=10/12
10/12+3/12=13/12=1 1/12
Assuming that the legnths given ae th sides o the room and th room is a recagnel
the diagonal makes 2 right triangles
pythagorean theorem
a^2+b^2=c^2
a and b are legs
c=hypotonuse
in this case
legnth and width are te legs and the diagonal is the hyptonuse
15^2+12^2=c^2
225+144=c^2
369=c^2
square root both sides
3√41ft=c
Answer:
it will be equal to 11/20
Answer: 80 %
Step-by-step explanation: take it and multiply by ten to get 80/100 then turn to percent to get 80%
hope this helps mark me brainliest if it did
