1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
levacccp [35]
2 years ago
15

A company selling products online held a survey asking a group of people about the number of products they ordered online in a m

onth. The table below shows the results of the survey.
Products Ordered
Number of Products Number of People
0 4
1 6
2 3
3 4
4 5
Number of Products Number of People
5 3
6 3
7 2
8 2
9 1

Which dot plot best displays the data in the table?
Mathematics
1 answer:
zalisa [80]2 years ago
6 0

Answer:

wed need to see an attatchment of the dot displays to give you an answer friend

You might be interested in
Solve the system of equations: y= 3x y= x^2 - 4
OLga [1]

Answer:

x=-1\\y=-3\\\\x=4\\y=12

Step-by-step explanation:

Make both equations equal to each other and solve for the variable x:

y=y\\3x=x^2-4\\x^2-3x-4=0\\

Find two numbers that when you add them you get -3 and the product of both numbers be -4. These numbers are 1 and -4. Then:

(x+1)(x-4)=0\\\\x+1=0\\x=-1\\\\x-4=0\\x=4

Substitute these values into one the original equations and solve for y:

y=3(-1)\\y=-3\\\\y=3(4)\\y=12

Therefore, you get that:

x=-1\\y=-3\\\\x=4\\y=12

5 0
3 years ago
A retailer buys a coat in bulk at a unit price of $45. The coat is marked up to 28% to sell in the store. What is the price of t
Lostsunrise [7]

Answer:

57.60

Step-by-step explanation:

If the coat is marked up 28%, then the cost is increased by 28% to produce the selling price.

SP = 45 + 28/100 * 45

SP = Selling Price

SP = 45 + 28*45 / 100

SP = 45 + 1260 / 100

SP = 45 + 12.60

SP = 57.60

Answer: The selling price is 57.60

8 0
3 years ago
A^2-a+12=0 I need the roots
kumpel [21]

Answer:

a = 1/2 (1 ±sqrt(47))

Step-by-step explanation:

a^2-a+12=0

We will complete the square

Subtract 12 from each side

a^2-a+12-12=0-12

a^2-a=-12

The coefficient of a = -1

-Divide by 2 and then square it

(-1/2) ^2 = 1/4

Add it to each side

a^2 -a +1/4=-12 +1/4

(a-1/2)^2 = -11 3/4

(a-1/2)^2= -47/4

Take the square root of each side

sqrt((a-1/2)^2) =sqrt(-47/4)

a-1/2 = ±i sqrt(1/4) sqrt(47)

a-1/2= ±i/2 sqrt(47)

Add 1/2 to each side

a-1/2+1/2 = 1/2± i/2 sqrt(47)

a =  1/2± i/2 sqrt(47)

a = 1/2 (1 ±sqrt(47))

8 0
3 years ago
The authors of a paper describe an experiment to evaluate the effect of using a cell phone on reaction time. Subjects were asked
Serggg [28]

Answer:

a) The 99% confidence interval would be given by (24.409;24.979)  

b) n=464

Step-by-step explanation:

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

Part a

The confidence interval for the mean is given by the following formula:  

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}} (1)  

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:  

df=n-1=47-1=46  

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,46)".And we see that t_{\alpha/2}=2.01  

Now we have everything in order to replace into formula (1):  

525-2.01\frac{75}{\sqrt{47}}=503.01  

525+2.01\frac{75}{\sqrt{47}}=546.99  

So on this case the 95% confidence interval would be given by (503.01;546.99)

Part b

The margin of error is given by this formula:  

ME=t_{\alpha/2}\frac{s}{\sqrt{n}} (1)  

And on this case we have that ME =7 msec, we are interested in order to find the value of n, if we solve n from equation (1) we got:  

n=(\frac{t_{\alpha/2} s}{ME})^2 (2)  

The critical value for 95% of confidence interval is provided, t_{\alpha/2}=2.01 from part a, replacing into formula (2) we got:  

n=(\frac{2.01(75)}{7})^2 =463.79 \approx 464  

So the answer for this case would be n=464 rounded up to the nearest integer  

8 0
3 years ago
Write three numbers grater than 20 that have 9 as a factor
Burka [1]
27, 36, 45 are greater than 20 and multiples of 9.
5 0
3 years ago
Other questions:
  • What is the equation of the line that passes through point (4, 12) and has a intercept of -2​
    7·1 answer
  • Please help me 4 1/7 + 1/2
    12·2 answers
  • Help me please and thank you
    14·1 answer
  • Question 3
    12·2 answers
  • A pool has 29,000,000 mL how many liters of water can the pool hold
    6·2 answers
  • Determine the exact value
    12·1 answer
  • A soccer league has $86 to buy new soccer balls. If each ball costs $7, how many balls can the league buy? ​
    7·2 answers
  • 13
    6·1 answer
  • I NEED THE RIGHT ANSWER ASAP.
    7·2 answers
  • Does 2x+18=25 equal X=3.5
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!