Question

A school district is deciding whether or not to adopt a new reading curriculum. Three classrooms are randomly selected as test sites for the curriculum. To obtain a measure of student improvement, students in the three classrooms are tested on their vocabulary before and after the curriculum is implemented. The vocabulary test has 20 possible points. The post-implementation scores for the students in the second classroom are shown in the following table: 10 12 13 11 14 13 10 8 12 9 7 13 Calculate the sample size, n; the total sum, ??X; and the sample mean, M. n = ??X = M = The school district decides it will be easier to understand the scores if they are converted to a 100-point scale. This requires that each score be multiplied by 5. Calculate the new n, ??X, and M. n = ??X = M =

          A school district is deciding whether or not to adopt a new reading curriculum. Three classrooms are randomly selected as test sites for the curriculum. To obtain a measure of student improvement, students in the three classrooms are tested on their vocabulary before and after the curriculum is implemented.

The vocabulary test has 20 possible points. The post-implementation scores for the students in the second classroom are shown in the following table:

10 12 13 11 14 13 10 8 12 9 7 13

Calculate the sample size, n; the total sum, ??X; and the sample mean, M.

n =

??X =

M =

The school district decides it will be easier to understand the scores if they are converted to a 100-point scale. This requires that each score be multiplied by 5.

Calculate the new n, ??X, and M.

n =

??X =

M =

A school district is deciding whether or not to adopt a new reading curriculum. Three classrooms are randomly selected as test sites for the curriculum. To obtain a measure of student improvement, students in the three classrooms are tested on their vocabulary before and after the curriculum is implemented.

The vocabulary test has 20 possible points. The post-implementation scores for the students in the second classroom are shown in the following table:

10 12 13 11 14 13 10 8 12 9 7 13

Calculate the sample size, n; the total sum, ??X; and the sample mean, M.

n =

??X =

M =

The school district decides it will be easier to understand the scores if they are converted to a 100-point scale. This requires that each score be multiplied by 5.

Calculate the new n, ??X, and M.

n =

??X =

M =

Added by Jennifer R.

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