The nutritional value of every food product is listed on the package in terms of protein, tat, etc. A researcher randomly selected 25 packs containing 30 grams of cashew and

carefully measured the amount of protein (in grams) incach pack. He verified the normality of the underlying distribution of the amount of prolein. Additionally, he reported thät the sample information indicated the mean amount of protien in all packs containing 30 grams of cashewranges from 5.076 grams and 5.424 grams and the sample standard deviation is 0.4 gram. He neglected to report what confidence level he had used for building this interval. Based on the above information, what is theconfidence level? Show ALL your work.