1. A researcher is interested in whether drinking different sources of caffeine (tea vs. coffee) leads
to differences in women's attentional control performance. She decides to put up flyers at Her
Gym locations around Texas to recruit participants. People can read the flyer and contact her to
participate if they are interested the study. She decides to have participants complete an
attention task called "Simon task after drinking either 2 cups of black tea or after drinking 2 cups
of regular coffee. She randomly assigns her participants to either the tea or the coffee beverage
condition. After collecting and analyzing the data, she obtains a p= .027.
a. What is the researcher's scientific/alternative hypothesis?
For exai
going to
nge (with 1
b. What is the researcher's null hypothesis?
C. What type of sample is the researcher using? And what is a disadvantage to
using this sample type ?
t? - Statis
d. What can the researcher conclude about these data?
esis?
e. If, in the population, women actually show NO difference in attentional control
performance after drinking black tea versus coffee, what type of statistical error
has the researcher made?
example?