Question

Lower and upper confidence interval estimate ahead of two months for cod catch (no trend in cod catch but it is changing slowly) for smoothing constant á=0.225 was found 300 and 477.12 tons. If the estimate of ó2 from the monthly catch of two years is s2=900. The confidence level at which the forecast of the cod catch was made: a) 99.2% , b) 99.8% , or c) 99.6%