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
DaniilM [7]
4 years ago
10

The speeds of vehicles traveling on a highway are normally distributed with an unknown population mean and standard deviation. I

f a random sample of 38 vehicles is taken to estimate the mean vehicle speed, what t-score should be used to find a 99% confidence interval estimate for the population mean
Mathematics
1 answer:
Artemon [7]4 years ago
5 0

Answer:

The t-score of 2.715 should be used

Step-by-step explanation:

Degrees of freedom ==> n - 1 ==> 38 - 1 ==> 37

to find 99% confidence interval,  Hence,

Find t0.005 in front of 37 degrees of freedom,

Therefore the answer is, t-score = 2.715

You might be interested in
Why is the product of 9s diagonal?
Nadusha1986 [10]

Answer:

A. With each 9s fact you add another 9, which means you go straight down a row and back one space. This creates a diagonal pattern in the grid.

6 0
3 years ago
Please answer!!! Will mark brainliest answer !!!
kenny6666 [7]

Answer:

A, D

Step-by-step explanation:

When we multiply the fractions, we can get:

\frac{1}{5^{4} }

This is also equivalent to:

5^{-4}

When looking at the answer choices, the only ones that equal 5^{-4} are A and D because:

(5^{-2})^{2}  =5^{-4}

5^{2}*5^{-6} = 5^{-4}

3 0
3 years ago
I’m not getting these at all
spin [16.1K]

Answer:

\frac{a}{1 +bc} = x

Step-by-step explanation:

In this question, it appears that you need to solve this equation in terms of x.

Beginning with the equation a = x(1 + bc), we must isolate the 'x' variable and make an equation equivalent to 'x'. This can be done by:

a = x(1 + bc)

Divide (1 + bc) from both sides, giving you:

\frac{a}{1 +bc} = x

8 0
3 years ago
PLEASE HELP, LAST THING I NEED TO GRADUATE
Mice21 [21]
For a), wouldn't you multiply the cost of a twin by the quantity of a twin beige (N) and the cost of a queen by the quantity of the queen beige (N) and then the cost of the king by the quantity of the king beige (N) for CN and do the same thing but with the south quantities? 
And then for b), it's just comparing which one had the most money and find the difference... 
And then C), would be relatively self explanatory where CN would be the potential profit in N and CS would be the potential profit in S and then CN+CS would be the potential profit total? 

7 0
3 years ago
How can you determine whether a given number makes an equation true?​
EastWind [94]

Answer:

By plotting in the number in the equation (aka where all the x’s are variables are) and seeing if it works.

Step-by-step explanation:

For example, let’s use the problem:

3x + 4 = 16

if the given number is 4, we fill it in for x-

3 (4) + 4= 16

solve to see if true:

12 + 4 = 16

16 = 16

hence, the given number 4 makes the equation true!

hopes this helps, have a great day :)

3 0
3 years ago
Other questions:
  • What is −5×(−2)= please help D:
    9·2 answers
  • On a day, a video was posted online, 5 people watched the video. The next day the number of viewers had doubled. This tend conti
    7·1 answer
  • Dog food costs 9$ per bag and cat food costs 8$ per bag. if billy spent 89$ and purchased 6 bags of dog food, how many bags of c
    11·1 answer
  • What is 1/6 of 11/12?
    14·2 answers
  • I need the answers for #8-10
    15·1 answer
  • 2. Simplify:<br> b. 3(2x + 4y)
    15·2 answers
  • Complete the equation of the line through (6,-6) and (8,8)
    6·1 answer
  • What is the solution of the system? Use elimination.<br> 5x + 6y = 17<br> −10x − 9y = −43
    8·1 answer
  • I need math help please.
    8·1 answer
  • Solve: X^3 = 27 it's solve for X <br><br> I just need some help
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!