An entomologist is investigating which of two fumigants, f1 or f2, is more effective in controlling parasities on tobacco plants. to compare the fumigants, nine fields of differing soil characteristics, drainage, and amount of wind shield were planted with tobacco. each field was then divided into two plots of equal area. fumigant f1 was randomly assigned to one plot in each field and f2 to the other plot. fifty plants were randomly selected from each field, 25 from each plot, and the number of parasites were counted. the data are in the following table. fumigant f1: 77, 40, 11, 31, 28, 50, 53, 26, 33fumigant f2: 76, 38, 10, 29, 27, 48, 51, 24, 32a. what are the populations of interest? b. do the data provide sufficient evidence to indicate a difference in the mean level of parasites for the two fumigants? use a=.10. report the p-value for the experimental data. c. estimate the size of the difference in the mean number of parasites between the two fumigants using 90% confidence interval.

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

ruth is 6 years old

step-by-step explanation:

6 + 24 = 30,   so 6/30 = .2  

if you do 1/5 it also equals .2, so that is the answer.

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation:

the answer is 1 becuz if it were 1.0 that would rip apart the entire so ya. : )

~potato.

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