Question

Pokemon or Super Mario Brothers? Over 260 million copies of Pokemon games have been sold worldwide. Over 240 million copies of Super Mario Brothers have been sold. If the last 35 years produces average annual sales of Pokemon games at 31.4 million with a standard deviation of 3.7 million and the average sales of Super Mario Brothers is 30.4 with a standard deviation of 4.0, is there a significant difference at the .05 level?

Identify the P-value: ___________

Answer 1

For Pokemon game : n1=260 , , s1=3.7

For Super Mario Brothers : n2=240 , , s2=4.0

Hypothesis : Vs

The test statistic is ,

P-value = ; From standard normal probability table

Decision : Here , P-value = 0.0039 < =0.05

Therefore , reject the null hypothesis

Conclusion : Hence , there is sufficient evidence to conclude that there is significant difference between the two population means at the 0.05 significance level.