In a distribution with u = 85 and a o= 6.45 ... what value of X separates the top 15% of the distribution?

what values of X separate the middle 60% of the distribution?

what value of X is the 25th percentile?

what values of X separate the middle 50% of the distribution?

A consumer survey indicates that the average house-hold spends = $185 on groceries each week. The distribution of spending amounts is approximately normal with a standard deviation of s = $25. Based on this distribution,

What proportion of the population spends more than $200 per week on groceries?

What is the probability of randomly selecting a family that spends less than $150 per week on groceries?

How much moneyX valuedo you need to spend on groceries each week to be in the top 20% of the distribution?