I need help really bad...can someone help?
The manager of a grocery store wants to estimate the percentage of his customers who like orange juice. He surveys the first 10 customers on a Monday morning.
Which statements are true? Select each correct statement.
a) The managerâ€™s sample is unlikely to be biased because the first 10 customers on
Monday morning represent all his customers.
b) The manager can improve his estimate by surveying 50 customers instead of 10.
c) The manager can improve his estimate by randomly selecting customers
throughout the week.
d) The only way the manager can estimate the percentage is to ask every customer
throughout the week.

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jhonyy9:

any idea ?

chuckthedonut:

@jhonyy9 wrote:

any idea ?

Not really, I've been pretty stressed so I guess I haven't been paying more attention in class..

jhonyy9:

He surveys the first 10 customers on a Monday morning.
what mean this ?

jhonyy9:

to estimate the percentage of his customers who like orange juice.
how you can calcule percentage ?

chuckthedonut:

I use the is/of strategy to do stuff with percents..

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jhonyy9:

He surveys the first 10 customers
suppose from these 10 customers like orange juice 4 persons
using the rule of 3 simple you can write
from 10 customers like oj. 4 pers
from 100 cust. like oj. x pers and cross muliplie than calcule x
x = (100*4)/10 = ? %

chuckthedonut:

40%

jhonyy9:

exactly
but do you understand the way now ?

chuckthedonut:

@jhonyy9 wrote:

exactly
but do you understand the way now ?

In between, how do I choose my answers if I have 40%

chuckthedonut:

How does that help me choose answers? I'm very confused, I'm sorry.

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jhonyy9:

what is the question of your posted problem ?

chuckthedonut:

@jhonyy9 wrote:

what is the question of your posted problem ?

The manager of a grocery store wants to estimate the percentage of his customers who like orange juice. He surveys the first 10 customers on a Monday morning.
Which statements are true? Select each correct statement.

chuckthedonut:

@chuckthedonut wrote:

@jhonyy9 wrote:

what is the question of your posted problem ?

The manager of a grocery store wants to estimate the percentage of his customers who like orange juice. He surveys the first 10 customers on a Monday morning.
Which statements are true? Select each correct statement.

Options are:
a) The managerâ€™s sample is unlikely to be biased because the first 10 customers on
Monday morning represent all his customers.
b) The manager can improve his estimate by surveying 50 customers instead of 10.
c) The manager can improve his estimate by randomly selecting customers
throughout the week.
d) The only way the manager can estimate the percentage is to ask every customer
throughout the week.

jhonyy9:

so i think than i understand these coices correct no one is right

chuckthedonut:

@jhonyy9 wrote:

so i think than i understand these coices correct no one is right

What do you mean?

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jhonyy9:

so i think a. will be right bc. how i ve made this calcules from this result just a probability

chuckthedonut:

It says pick all that apply, is that the only one?

jhonyy9:

and again i think make sens c. and d. too

jhonyy9:

yes ?

jhonyy9:

d) The only way the manager can estimate the percentage is to ask every customer
throughout the week.
no this is false bc. not is the only way

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chuckthedonut:

Ohhh, so that means a?

jhonyy9:

i think a. and c.

chuckthedonut:

@jhonyy9 wrote:

i think a. and c.

d doesn't make sense for this situation, so it's for sure not d

jhonyy9:

yes d. not is right bc. there say the only way what not is true

chuckthedonut:

Thank you so much for helping, it means a lot to me. I'm also gonna ask my teacher if she can teach me more abt stuff like this.