Jelly A consumer advocate wants to collect a sample ofjelly jars and measure the actual weight of the product in the container. He needs to collect enough data to con-struct a confidence interval with a margin of error of nomore than 2 grams with 99% confidence. The standarddeviation of these jars is usually 4 grams. What do yourecommend for his sample size?

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A: (d)

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A: given data, n1=73x¯1=167s12 =71s1=8.4261n2=47x¯2=180s22 =66s2=8.124

Average

In mathematics, everyone must have heard the term average in one place or other. Almost all types of calculation require taking out an average. In everyday life, the term is used for denoting a certain amount that can be said to be a typical quantity for multiple people or objects. In other words, if a group of people possesses a certain object, then the average gives us an idea regarding the quantity of the object possessed by each person. However, this is solely based on mathematical calculation. It is important to note that most people will not strictly have the average value in a group.