12. Ms. Lacy wants to work out. Drop It Like It's Hot gym charges a monthly rate of $25 and

You successfully completed statistics, and the Math Department Chair recruited you to be a tutor. It’s day one on the job, and y

zvonat [6]

Answer:

Step-by-step explanation:

Ok, so we have to help your pupil (lets call her Jane) figure out "why researchers should use a random sample to conduct a survey". So, i will list all of the choices.

A random sample is likely to avoid bias
In a random sample some members of the population are more likely to be selected than others
Random samples provide consistency and systematically favor one choice over every other choice in each survey question
Random sampling will provide a more representative sample of population
Researchers can use a random sample to draw conclusions about the population

Random sampling is used to get the best average, and not favor any one opinion. For example, if you were trying to figure out the daily spending budget of people, you wouldn't just go to the upper clas part with all the rich people, you would survey from all over the town to get results from all kinds of people. So, the answers are:

A random sample is likely to avoid bias (because thats exactly what they do)

Random sampling will provide a more representative sample of population (because they are designed to do that)

Researchers can use a random sample to draw conclusions about the population (thats why they take the samples)

Hope this helps

4 0

4 years ago

3:2 is equivalent to

PIT_PIT [208]

Answer:

9:6 27:18 and 81: 54

Step-by-step explanation:

3 0

2 years ago

Probability is a measure of how likely an event is to occur. write the probability of the following statements:

attashe74 [19]

Step-by-step explanation:

This is a probability related question, let the event be E

We know that the likelihood of an event happening is given as

Pr(E)=1

if an event will not occur the probability is

Pr(E)=0

a. This event is impossible: Pr(E)=0

b.This event will occur more often than not, but is not extremely likely:

Pr(E)=0<E>0.5

c.This event is extremely unlikely, but it will occur once in a while in a long sequence of trials:

Pr(E)=0<E<0.5

d.This event will occur for sure: Pr(E)=0

7 0

3 years ago

a cashier at the supermarket has $685 in 4 different denomination bills in her register at the end of the day. the number of $5

netineya [11]

9514 1404 393

Answer:

85 ones
70 fives
15 tens
2 fifties

Step-by-step explanation:

Let a, b, c, d represent the numbers of $1, $5, $10, and $50 bills, respectively. The problem statement tells us ...

a +5b +10c +50d = 685 . . . . . total amount of cash

b = 10 +4c . . . . . . . . . . . . the number of fives is 10 more than 4 times tens

a = b+c . . . . . . . . . . . as many ones as fives and tens combined

d = 2 . . . . . . . . . . the register contained 2 fifty-dollar bills

__

Substituting for 'a', then for 'b', we have ...

(b+c) +5b +10c +50d = 685

6(10 +4c) +11c +50d = 685

60 +35c +50d = 685

Substituting d=2 and subtracting 160 gives ...

35c = 525

c = 15

b = 10 +4c = 10 +4(15) = 70

a = b+c = 70 +15 = 85

The register contained ...

85 ones
70 fives
15 tens
2 fifties

5 0

3 years ago

Read 2 more answers

In ABC, c is a right angle, what is the measure of x

lozanna [386]

Answer:

45

Step-by-step explanation:

90+2x=180

2x=180-90

2x=90

x=90/2

x=45

3 0

3 years ago