10. Correct. The answer is true

We should decide between the hypotheses:

H₀: σ = 0.25

H₁: σ >0.25.

The value of χ² for the sample is χ ²=ns²/σ ² =30*0.32²/0.25²=49.15.

Using a one-tailed test we would reject H₀ at a 0.05 level of significance if the sample value of χ² were greater than χ²_0.95, which equals 42.56 for n=30-1=29. Thus we reject H₀ at a 5% level of significance.