It is hypothesized that the market share of a corporation should vary more in an industry with active price competition than in one with duopoly and tacit collusion. In a study of the steam turbine generator industry." it was found that in 4 years of active price competition.

the variance of General Electric's market share was 114.09. In the following 7 years, in which there was duopoly and tacit collusion, this variance was 16.08. Assume that the data can be regarded as an independent random sample from two normal distributions. Test at the 5%-level the null hypothesis that the two population variances are equal against the alternative that the variance of market share is higher in years of active price competition.