Question

You go to n = 10 ghost-infested houses while wearing the scary costume. You find that it takes an average of M = 4 minutes for the ghosts to leave the houses, with a standard deviation of s = 2 minutes. You think it takes an average of μ = 6 minutes for ghosts to leave a house when no one is wearing a scary costume. Use an alpha of α = .05 and a two-tailed test.

1. Calculate the estimated standard error and a one-sample t-test.

2. Write up your full results in APA style. You should include the following:

• The variable/treatment with the mean and standard deviation.

• Whether there was a significant effect.

Answer 1

Claim: To test whether that the time taken by ghost to leave the house when no one wearing a scary costume is 6minutes

Hypothesis:

  

Two Tailed test

Test statistics:

Where sample mean =4 minutes

sample Standard deviation= s= 2

sample size = n = 10

Standard error =

Test statistics =

we get test statistics = t = -3.162

Degrees of freedom = n - 1 = 9

Critical value : tc = 2.262 ...( By using t table)

Decision Rule : we Reject Ho

Conclusion : There is sufficient evidence to conclude that the time taken by ghost to leave the house when no one wearing a scary costume is 6 minutes