For each of the following three studies Identify whether the hypothesis can be tested experimentally or if it is a non-experimental hypothesis. What is the independent variable/grouping variable (and which is it, IV or GV)? What is the dependent variable? Identify the null hypothesis, both in your own words and by writing the statistical hypothesis using the population parameter notation discussed in class. What is the non-directional alternate hypothesis? Write it both in your own words and the statistical parameter notation discussed in class. (Make sure these both specify the same direction.) Make your best guess about a directional alternative hypothesis – that is, what you would expect to happen in this study. Write it in your own words and using the statistical parameter notation discussed in class. ***Be sure you use the correct label (H0 or H1/Ha) for your statistical hypotheses. Also, if make sure I know what the groups are (in other words, if you use m1 in your statistical hypothesis, make sure we know which group m1 is in the study design. Or use something other than numbers to let me know which mean is for which group.). Two groups of rats have been trained to press a lever for a solution that contains cocaine. One group of rats gets 0.5 mg/kg of cocaine for each lever press. The other group gets 1.0 mg/kg of cocaine per lever press. The researchers measure how many times the rats press the lever to get cocaine in an hour.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

For each of the following three studies

Identify whether the hypothesis can be tested experimentally or if it is a non-experimental hypothesis.
What is the independent variable/grouping variable (and which is it, IV or GV)?
What is the dependent variable?
Identify the null hypothesis, both in your own words and by writing the statistical hypothesis using the population parameter notation discussed in class.
What is the non-directional alternate hypothesis? Write it both in your own words and the statistical parameter notation discussed in class. (Make sure these both specify the same direction.)
Make your best guess about a directional alternative hypothesis – that is, what you would expect to happen in this study. Write it in your own words and using the statistical parameter notation discussed in class.

***Be sure you use the correct label (H₀ or H₁/H_a) for your statistical hypotheses. Also, if make sure I know what the groups are (in other words, if you use m₁ in your statistical hypothesis, make sure we know which group m₁ is in the study design. Or use something other than numbers to let me know which mean is for which group.).

Two groups of rats have been trained to press a lever for a solution that contains cocaine. One group of rats gets 0.5 mg/kg of cocaine for each lever press. The other group gets 1.0 mg/kg of cocaine per lever press. The researchers measure how many times the rats press the lever to get cocaine in an hour.

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