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
son4ous [18]
3 years ago
15

THIRTY FIVE POINTS.

Mathematics
1 answer:
son4ous [18]3 years ago
3 0

Answer: 31500 to 38500

Step-by-step explanation:

Lets find lower limit of guess

35000 - ( 35000 * 10% )

= 31500

Upper limit of guess

35000 + ( 35000 * 10% )

= 38500

So your guess can be anything between these two values.

You might be interested in
Flow meters are installed in urban sewer systems to measure the flows through the pipes. In dry weatherconditions (no rain) the
ziro4ka [17]

Answer:

a) \frac{(8)(30.23)^2}{20.09} \leq \sigma^2 \leq \frac{(8)(30.23)^2}{1.65}

363.90 \leq \sigma^2 \leq 4430.80

Now we just take square root on both sides of the interval and we got:

19.08 \leq \sigma \leq 66.56

b) For this case we are 98% confidence that the true deviation for the population of interest is between 19.08 and 66.56

Step-by-step explanation:

423.6, 487.3, 453.2, 402.9, 483.0, 477.7, 442.3, 418.4, 459.0

Part a

The confidence interval for the population variance is given by the following formula:

\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}

On this case we need to find the sample standard deviation with the following formula:

s=sqrt{\frac{\sum_{i=1}^8 (x_i -\bar x)^2}{n-1}}
And in order to find the sample mean we just need to use this formula:
[tex]\bar x =\frac{\sum_{i=1}^n x_i}{n}

The sample deviation for this case is s=30.23

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

df=n-1=9-1=8

The Confidence interval is 0.98 or 98%, the value of \alpha=0.02 and \alpha/2 =0.01, and the critical values are:

\chi^2_{\alpha/2}=20.09

\chi^2_{1- \alpha/2}=1.65

And replacing into the formula for the interval we got:

\frac{(8)(30.23)^2}{20.09} \leq \sigma^2 \leq \frac{(8)(30.23)^2}{1.65}

363.90 \leq \sigma^2 \leq 4430.80

Now we just take square root on both sides of the interval and we got:

19.08 \leq \sigma \leq 66.56

Part b

For this case we are 98% confidence that the true deviation for the population of interest is between 19.08 and 66.56

4 0
3 years ago
How do you do 4x - 9 = 6x - 13? what do you subtract from both sides?
ohaa [14]
To start, you need to subtract 4x from both sides, that way, x is one one sid of the equation.

8 0
3 years ago
Read 2 more answers
On your math quiz, you earn 5 points for each question that you answer correctly. In the equation below, x represents the number
labwork [276]

Answer:

x-independent

y-dependent

Step-by-step explanation:

Dependent variable: y because you get the points by doing the quiz.

Independent variable: x because you don’t know how many questions you answered correctly.

Total points you score: Unknown until you know how many you got right also the same as y.

Number of questions you answer correctly: Unknown until you get your paper back, also the same as x.


Read more on Brainly.com - brainly.com/question/9741421#readmore

3 0
3 years ago
Every day Matilda's mom goes to the store and buys apples and oranges for $22. Then today she returned home with 5 apples and 4
BlackZzzverrR [31]

Answer: $1.82

Step-by-step explanation:

3 0
3 years ago
Question:<br><br><br> $5.36 for 20 oz.
Pepsi [2]

Answer:

nojjiiiiiiiiiiiiii9o in jj ko o in k

3 0
3 years ago
Other questions:
  • True or false? it's not possible to build a triangle with side lengths of 3 3 and 9
    6·2 answers
  • What is 4 wholes and 2 3rds divided my 1 whole and w ninths
    14·1 answer
  • A rectangular shoebox has a volume of 728 cubic inches. The base of the shoebox measures 8 inches by 6.5 inches. How long is the
    8·1 answer
  • The length of a rectangle in centimeters is two more than thrice its width. a) Write an expression, in the simplest form, for th
    14·1 answer
  • Divide 90kg into the ration 2:3:7
    10·2 answers
  • What is an equation of the line that passes through the points (−6,−2) and (6, 8)
    7·1 answer
  • Simplify 4x+2x+3x Helpppp
    12·2 answers
  • PLZ HELP Word Problems on the system of equations:
    13·1 answer
  • 60<br>42<br>2V175 - 2V20-<br>+ 8/5<br>45<br>28​
    9·1 answer
  • Help<br> pleasee<br><br><br><br><br><br><br> ...............
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!