Which of the following statements is true for a randomized block design when comparing treatment effects?
a. The test statistic is F = MSB/MSE.
b. The test statistic is F = MSTR/MSE.
c. The null hypothesis is that the block means are equal.
d. The null hypothesis is that at least two of the block means differ.

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

A50% increase followed by 33 1/2% decrease

For a science project, a high school research team conducted a survey of local air temperatures. based on the results of the survey, the found that the average temperatures were around 10 degrees higher than expected. this result was wrong. the trouble with the survey was that most of the locations were exposed to direct sunlight and located over asphalt or sand, which resulted in higher temperatures than normal. this is a classic example of an error in which phase of inferential statistics?