A researcher is interested in the effect of music on memory. She randomly divides the students into 3 groups: those who will listen to quiet music, those who will listen to loud music, and those who will not listen to music. After the music is played (or not), she given students a memory test. What is the treatment variable

What is the number 321,000,000 in scientific notation? also what is the number? ?

Need now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?