StatisticsHardConfidence Intervals ShareConfidence Intervals · Hard problemA sample of 400400400 gives p^=0.5\hat p = 0.5p^=0.5 and a confidence interval of 0.5±0.06440.5 \pm 0.06440.5±0.0644. What confidence level was used?A95%95\%95%B90%90\%90%C98%98\%98%D99%99\%99%Check Show answer Walk through it step by step Practice more like this Review this concept