difference between the population means? I'm supposed to use an independent samples t-test to test a null hypothesis of no difference between the population means, and I'm not really sure how to do it, so any help would be appreciated.
Here is the info:
Tom wants to test the effect of mood on concentration. His research hypothesis is that when one is happy, one can concentrate better than when one is neither angry or happy. He measures concentration using pictures of objects recalled in a memory task. The more pictures recalled, the better the concentration. It will be 48 participants assigned to one of two groups. The groups are: Happy mood and No Particular mood. Those in the Happy mood group will write half a page about the happiest event that happened to them in 2010, while the No Particular mood would write half a page about what they did last week. A restricted random assignment is used to ensure equal sample sizes in both groups. After the writing task, all participants completed a memorization task. They were given 5min to memorize 50 pictures of random objects. When the 5min were up, they would write down as many objects that they could remember. Those in the Happy mood condition recalled an average of M= 36 objects (SD= 4.1). Those in the No Particular mood condition recalled an average of M= 43 objects (SD= 3.2).
I would assume the null hypothesis would be: One's mood will not make a difference on one's concentration level.. Am I correct?
So how would you use an independent samples t-test to test a null hypothesis of no difference between the population means? Please show all work if anyone would be so kind and help me do this.. Thanks
Here is the info:
Tom wants to test the effect of mood on concentration. His research hypothesis is that when one is happy, one can concentrate better than when one is neither angry or happy. He measures concentration using pictures of objects recalled in a memory task. The more pictures recalled, the better the concentration. It will be 48 participants assigned to one of two groups. The groups are: Happy mood and No Particular mood. Those in the Happy mood group will write half a page about the happiest event that happened to them in 2010, while the No Particular mood would write half a page about what they did last week. A restricted random assignment is used to ensure equal sample sizes in both groups. After the writing task, all participants completed a memorization task. They were given 5min to memorize 50 pictures of random objects. When the 5min were up, they would write down as many objects that they could remember. Those in the Happy mood condition recalled an average of M= 36 objects (SD= 4.1). Those in the No Particular mood condition recalled an average of M= 43 objects (SD= 3.2).
I would assume the null hypothesis would be: One's mood will not make a difference on one's concentration level.. Am I correct?
So how would you use an independent samples t-test to test a null hypothesis of no difference between the population means? Please show all work if anyone would be so kind and help me do this.. Thanks