An agricultural researcher is interested in estimating the mean length of the growing season in a region. treating the last 10 years as a simple random sample, he obtains the following data, which represent the number of days of the growing season. what is the point estimate of the population mean number of days of the growing season? 150 157 145 141 173 193 187 179 171 147

164.3

Step-by-step explanation:

Point estimate can be found by finding the mean of the sampling data. In this case agricultural researcher samples last 10 years as a simple random sample and obtains the following data:

150 157 145 141 173 193 187 179 171 147

The mean of the data can be calculated by simply adding them and dividing by 10:

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".