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
atroni [7]
2 years ago
15

1. Fill in the blank:

Mathematics
1 answer:
liberstina [14]2 years ago
8 0

Step-by-step explanation:

Pi (Ratio of the Circumference of a Circle to Its Diameter) Circles are all similar, and "the circumference divided by the diameter" produces the same value regardless of their radius. This value is the ratio of the circumference of a circle to its diameter and is called π (Pi).

You might be interested in
To obtain information on the corrosion-resistance properties of a certain type of steel conduit, 45 specimens are buried in soil
Debora [2.8K]

Answer:

statistic value t= 5.43

p-value: < 0.00001.

Step-by-step explanation:

Hello!

To obtain information over the corrosion-resistance properties of a certain type of steel conduit a random sample of 45 specimens was taken and buried for two years.

The study variable is:

X: Max. penetration of a steel conduit.

The data of the sample

n= 45

sample mean X[bar]= 53.4

sample standard deviation S= 4.2

The conduits are manufactured to have a true average penetration of at most 50 mills, symbolically: μ ≤ 50

The hypothesis is:

H₀: μ ≤ 50

H₁: μ > 50

α: 0.05

To choose the corresponding statistic to use to study the population mean, the variable must have a normal distribution. There is no available information to check this, so I'll just assume that the variable has a normal distribution and, since the population variance is unknown and the sample is small, the statistic to use is a Student t.

Under the null hypothesis, the critical region and the p-value are one-tailed.

Critical value:

t_{n-1; 1-\alpha } = t_{44; 0.95} = 1.68

Rejection rule:

Reject the null hypothesis when t ≥ 1.68

t= \frac{53.4 - 50}{\frac{4.2}{\sqrt{45} } }

t= 5.43

The calculated value is greater than the critical value, thedecision is to rject the null hypothesis.

p-value:

P(t ≥ 5.43) = 1 - P(t < 5.43) = < 0.00001.

The p-value is less than α so the decision is to reject the null hypothesis.

Since the null hypothesis was rejected, then the population average of the penetration of the conduits specimens is greater than 50 mils. It is not recommendable to use these conduits.

I hope it helps!

4 0
3 years ago
When writing a geometric proof, which angle relationship could be used alone to justify that two angles are congruent?
Allisa [31]
Vertical angles i believe is the right answer to this problem
5 0
3 years ago
Read 2 more answers
Which term best describes the graph of y = -2X + 4
Alexxandr [17]

Answer:

Decreasing, negative slope

Step-by-step explanation:

Bc the slope is -2x in this equation therefore its a negative slope.

3 0
2 years ago
BRAINLIST BRAINLISSSST
Alexxx [7]

Answer:

B is not true

Step-by-step explanation:

6 0
2 years ago
Square roots and stuff like that Help Plz
Nastasia [14]
2+3sqrt9= 2+3(3)=2+9= 11

cube root of 1000 divided by 5=  10/5= 2

3sqrt9-4cube root64=3(3)-4(4)=9-16= - 7
3 0
3 years ago
Read 2 more answers
Other questions:
  • 20 multiplication facts in one minute. How long to take him to complete 35 multiplication facts
    11·1 answer
  • The smaller triangle is a dilation of the larger triangle with a center of dilation at (2,−1) .
    10·2 answers
  • alaska has a land area of about 1,700,000 square kliometers. florida has a land area .1 the size of alaska. what is the land are
    14·2 answers
  • Flora has 33 flowers and she can pick 7 flowers a minute. Write an equation that shows how many flowers, F, that Flora will have
    11·1 answer
  • Which of the following is a perfect square trinomial ? PLEASE HELP!!!!!!!!!!!!!!!!!
    6·1 answer
  • What the place value of the digit 3 in the number: 252.073
    13·1 answer
  • What is the value of X 56•
    8·1 answer
  • Answer the attachment.​
    10·1 answer
  • Jasmine drew this display to represent the amount of
    5·2 answers
  • 19
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!