The school board administered a reading test to all eighth-grade students at high achievers charter school and determined that 10%, percent of them were reading below grade level.
based on this data, which of the following conclusions are valid?

choose 1
a 10% percent of students in this sample are reading below grade level, but we cannot conclude anything about the eighth-grade students at hacs.

b 10% percent of all students at hacs are reading below grade level.

c 10% percent of all eighth-grade students at hacs are reading below grade level.

Which choice represents the sample space ,s for this event

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)

Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. here are data on the "penetrability" of the same type of soil at two levels of compression. penetrability is a measure of how much resistance plant roots will meet when they try to grow through the soil. compressed soil 2.85 2.66 3 2.82 2.76 2.81 2.78 3.08 2.94 2.86 3.08 2.82 2.78 2.98 3.00 2.78 2.96 2.90 3.18 3.16 intermediate soil 3.17 3.37 3.1 3.40 3.38 3.14 3.18 3.26 2.96 3.02 3.54 3.36 3.18 3.12 3.86 2.92 3.46 3.44 3.62 4.26 use the data, omitting the high outlier, to give a 95% confidence interval for the decrease in penetrability of compressed soil relative to intermediate soil. compute degrees of freedom using the conservative method. interval: to