Author Question: A researcher hypothesizes that babies will fall to sleep more quickly if they can hear the sound of ... (Read 139 times)

burton19126 · **on:** Jul 13, 2018

A researcher hypothesizes that babies will fall to sleep more quickly if they can hear the sound of a recorded heartbeat. The null hypothesis for this study is that

a. babies who hear a heartbeat will fall asleep more quickly than those who don't hear a heartbeat
b. babies who hear a heartbeat will fall asleep more slowly than those who don't hear a heartbeat
c. babies who hear a heartbeat will fall asleep just as quickly as those who don't hear a
heartbeat
d. babies who hear a heartbeat will not fall asleep
e. these are all null hypotheses

Question 2

A frequency polygon is a

a. bar graph
b. table
c. line graph
d. class interval
e. histogram