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
Brut [27]
3 years ago
7

Help me on the Elizabeth problem please

Mathematics
1 answer:
EastWind [94]3 years ago
4 0

4 big mice and 3 small mice because 4 X 25=100; 3 X 10=30


100+30=130

is that right?


You might be interested in
I want to hurt myself...and im stressed what do i do?
Montano1993 [528]
No no dont take any bad decisions god know what to do there is a bright future in front of u
3 0
2 years ago
Read 2 more answers
I need help with this question <br>-4 (2p+ 3) = -(p+1) - 2​
ankoles [38]

Answer:

-4 (2p+ 3) = -(p+1) - 2​

-8p -12 = -p-1-2

-7p=9

p=-9/7

Step-by-step explanation:

6 0
3 years ago
Helpppp plzzzzzzzzzzzzzzz
marin [14]

Answer:

y= 0.2(0.05)^x

5 0
3 years ago
When consumers apply for credit, their credit is rated using FICO (Fair, Isaac, and Company) scores. Credit ratings are given be
Flura [38]

Answer:

a) The 99% confidence interval would be given by (589.588;731.038)

b) If we see the confidence interval the 620 is included on the interval we don't have enough evidence to reject the rating is 620. But since we need a score that at least 620 and our lower limit is 589.588 we cant conclude that all the clients would have a score that at least of 620.  

Step-by-step explanation:

Previous concepts

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".

The data is:

661 595 548 730 791 678 672 491 492 583 762 624 769 729 734 706

Part a

Compute the sample mean and sample standard deviation.  

In order to calculate the mean and the sample deviation we need to have on mind the following formulas:  

\bar X= \sum_{i=1}^n \frac{x_i}{n}  

s=\sqrt{\frac{\sum_{i=1}^n (x_i-\bar X)}{n-1}}  

=AVERAGE(661, 595, 548, 730, 791, 678, 672, 491 ,492, 583, 762 ,624 ,769, 729, 734, 706)

On this case the average is \bar X= 660.313

=STDEV.S(661, 595, 548, 730, 791, 678, 672, 491 ,492, 583, 762 ,624 ,769, 729, 734, 706)

The sample standard deviation obtained was s=95.898

Find the critical value t* Use the formula for a CI to find upper and lower endpoints

In order to find the critical value we need to take in count that our sample size n =16<30 and on this case we don't know about the population standard deviation, so on this case we need to use the t distribution. Since our interval is at 99% of confidence, our significance level would be given by \alpha=1-0.99=0.01 and \alpha/2 =0.005. The degrees of freedom are given by:

df=n-1=16-1=15

We can find the critical values in excel using the following formulas:

"=T.INV(0.005,15)" for t_{\alpha/2}=-2.95

"=T.INV(1-0.005,15)" for t_{1-\alpha/2}=2.95

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

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

And if we find the limits we got:

660.313- 2.95\frac{95.898}{\sqrt{16}}=589.588  

[tex]660.313+ 2.95\frac{95.898}{\sqrt{16}}=731.038/tex]  

So the 99% confidence interval would be given by (589.588;731.038)

Part b

If we see the confidence interval the 620 is included on the interval we don't have enough evidence to reject the rating is 620. But since we need a score that at least 620 and our lower limit is 589.588 we cant conclude that all the clients would have a score that at least of 620.  

4 0
3 years ago
Happy new year, <br> add 2000 + 21 = 2021<br> trying to be fun and creative.
uranmaximum [27]

HAPPY NEW YEAR:)

not only today

always be fun and creative

3 0
2 years ago
Read 2 more answers
Other questions:
  • PLEASE HELP!!! The total area of fictional Puget Loud, near Seapple, Washington, can be roughly estimated using a rectangular sh
    12·1 answer
  • 2. A polygon that has no interior angles greater than 180 degrees is a ________________ polygon. *
    10·2 answers
  • which of the following statements best describes midpoint of a line segment? 1. point at end of line segments 2. a point halfway
    15·1 answer
  • How can you find f(4) if f(x)=7x2−5
    12·1 answer
  • Probability of getting heads when a two headed coin is tossed
    13·1 answer
  • 8) T
    12·1 answer
  • Write the expression as a trinomial (5c+2)(2c-1)
    8·2 answers
  • Question
    11·1 answer
  • Simplify this fraction: <br> 2160/10
    12·2 answers
  • Solve for x. Round your answer to the nearest tenth.<br> 12<br> 14
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!