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
Tomtit [17]
3 years ago
5

A university has 40,020 students. In a random sample of 270 students, 18 speak three or more languages. Predict the number of st

udents at the university who speak three or more languages.
Mathematics
1 answer:
noname [10]3 years ago
3 0

Answer:

149

Step-by-step explanation:

You might be interested in
National data indicates that​ 35% of households own a desktop computer. In a random sample of 570​ households, 40% owned a deskt
Elan Coil [88]

Answer:

Yes, this provide enough evidence to show a difference in the proportion of households that own a​ desktop.

Step-by-step explanation:

We are given that National data indicates that​ 35% of households own a desktop computer.

In a random sample of 570​ households, 40% owned a desktop computer.

<em><u>Let p = population proportion of households who own a desktop computer</u></em>

SO, Null Hypothesis, H_0 : p = 25%   {means that 35% of households own a desktop computer}

Alternate Hypothesis, H_A : p \neq 25%   {means that % of households who own a desktop computer is different from 35%}

The test statistics that will be used here is <u>One-sample z proportion</u> <u>statistics</u>;

                                  T.S.  = \frac{\hat p-p}{{\sqrt{\frac{\hat p(1-\hat p)}{n} } } } }  ~ N(0,1)

where, \hat p = sample proportion of 570​ households who owned a desktop computer = 40%

            n = sample of households = 570

So, <u><em>test statistics</em></u>  =  \frac{0.40-0.35}{{\sqrt{\frac{0.40(1-0.40)}{570} } } } }

                               =  2.437

<em>Since, in the question we are not given with the level of significance at which to test out hypothesis so we assume it to be 5%. Now at 5% significance level, the z table gives critical values of -1.96 and 1.96 for two-tailed test. Since our test statistics doesn't lies within the range of critical values of z so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which we reject our null hypothesis.</em>

Therefore, we conclude that % of households who own a desktop computer is different from 35%.

3 0
3 years ago
How to do this problem
Maslowich

Answer:

1 tens   3 ones

Step-by-step explanation:

All you do is count the numbers in the place value chart.

Since 31-18=13, all you do is count 10+1+1+1=13.

3 0
3 years ago
Solve this equation for k.<br><br> 3 − 3k + 7k = 5b<br><br> Enter the correct answer in the box.
Sloan [31]

Answer:

k=5b/4−3/4

Step-by-step explanation:

3-3k+7k=5b

Isolate the variable by dividing each side by factors that don't contain the variable.

k=5b/4−3/4

-hope it helps

8 0
2 years ago
£360 is shared between Chloe and Denesh. The ratio Abby gets to the ratio Ben gets us 2:7 Chloe and denesh each get 1:5 times th
andreev551 [17]

Answer:

£210

Step-by-step explanation:

I think i just worked it out in my head

6 0
3 years ago
Read 2 more answers
Write the Function in function notation.<br><br> y=4b+5
RoseWind [281]

Answer: (b)=4b+5

hope this helped!! :)

8 0
3 years ago
Other questions:
  • Solve for e.<br><br> 4/3=-6e-5/3
    9·1 answer
  • What is the value of x in the equation 32(4x – 1) – 3x = 54 –(x + 2)?
    9·1 answer
  • Help! What’s the y intercept of the linear equation 7+y=4.3x
    8·1 answer
  • 1. Find the phase shift of the function y = 5cos(2x + pi/2).
    12·1 answer
  • How can x-2/3=5/6 be solved for x in one step
    5·1 answer
  • Six equilateral triangles are connected to create a regular hexagon. The area of the hexagon is 24a^2 – 18 square units. Which i
    8·2 answers
  • When classifying a triangle by its
    7·2 answers
  • Which of these procedures is the same as multiplying a whole number by 100? (A) Multiply the whole number by 2, ten times. (B) M
    15·1 answer
  • 2 3/4 x 8 = blank/4 x 8/1
    10·2 answers
  • Please help! Will mark brainliest!
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!