In a study of texting speed, 45 adults aged 18-22 were randomlychosen. Each person was asked to type the following phrase exactly“Hi! What’s up?” on a cell phone. The average time it took was 2.72seconds. This was found to happen with about a 25% chance whencompared to someone saying it takes less than 3 seconds totype.

1.) Identify the following: a. Population:______________________________________________

b. Sample: _________________________________________________

c. Unit/individual:___________________________________________

d. Response variable:________________________________________

2.) What type of variable is the response variable? And what isthe level of measurement?

3.) Determine whether the results below appear to havestatistical significance, and also determinewhether the results have practicalsignificance.

In a study of a hair growth vitamin, 65 subjects grew an averageof 1.4 inches of hair in 4 weeks. If regular hair growth is ¼ inchper month. It is found that there is about a 2% chance of gettingsuch results with a diet that has no effect.

i. Does the weight loss program have statisticalsignificance?

ii. Does the weight loss program have practicalsignificance?

Determine which of the four levels of measurement (nominal,ordinal, interval, ratio) is most appropriate for the databelow.

4) Alert system of yellow (lowest), orange, and red (highest)right

5) Social security numbers

6) Years in which a war was started

7) Class times measured in minutes