IQ scores among the general population have a mean of 100 and a standard deviation of 14. A researcher claims that the standard deviation, , of IQ...

IQ scores among the general population have a mean of 100 and a standard deviation of 14. A researcher claims that the standard deviation, σ, of IQ scores for females is not equal to 14. A random sample of 24 IQ scores for females had a mean of 99 and a standard deviation of 12. Is there significant evidence (at the 0.1 level of significance) to conclude that the researcher's claim is correct?