Being able to open and close windows is not a primary technology ?

Dr. williams conducted a survey in the mall, measuring the shopping habits of people ages 15, 25, 35, 45, and 55, with 10 people in each group. which of the following best describes her study? an experiment a cross-sectional study a case study a longitudinal study a double-blind study

Professor king finds out that the results of her study on visual and auditory stimuli and activity in the right hemisphere of the brain are statistically significant. what does it mean when the results of a study are statistically significant?

It is believed that 43% of the us population can play the piano, 28% can play the guitar, 15% can play the harmonica, 12% can play the drums, and 2% can play other instruments. you want to take a simple random sample of individuals to test this claim. what is the smallest number of people required for the sample to meet the conditions for performing inference? 250 150 100 43 2