STAT problem, please help! I'm taking it online, and have no Idea how to solve it!

A consumer survey indicates that the average household spends μ= $185 on groceries each week?

The distribution of spending amounts is approximately normal with a standard deviation of σ=$ 25.

Based on this distribution,

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

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

c) How much money do you need to spend on groceries each week to be in the top 20% of the distribution?

Question

STAT problem, please help! I'm taking it online, and have no Idea how to solve it!

A consumer survey indicates that the average household spends μ= $185 on groceries each week?

The distribution of spending amounts is approximately normal with a standard deviation of σ=$ 25.

Based on this distribution,

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

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

c) How much money do you need to spend on groceries each week to be in the top 20% of the distribution?

moonlight93 · Answer

@dan815  can you get me started on this please? I have no idea how to do it.