Devotional activity that is voluntary and non-denominational may be sponsored by public schools

"Scientific research must always be precise and controlled."

A) This is a true statement. B) This is an untrue statement. C) This is a mostly true statement. D) This is a mostly untrue statement.

Which of the following statements is true of systematic sampling?

a) more precise than simple random sampling b) a little more difficult and involved than simple random sampling c) not all members of the population have an equal chance to be selected d) ensures that the profile of the sample matches the profile of the population