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
NeTakaya
3 years ago
6

Does anyone Understand this.

Mathematics
1 answer:
Dafna11 [192]3 years ago
8 0
Its 19 bro, you substitute 3 into the equation in replace for x
You might be interested in
Find three consecutive even integers whise sum is 222
dangina [55]

74....74....74............

6 0
3 years ago
Read 2 more answers
Three angles of a quadrilateral are 75 degrees, 90 degrees, and 75 degrees. Find the fourth angle?
tresset_1 [31]

Answer:

120 deg

Step-by-step explanation:

5 0
3 years ago
Which expression and diagram represent “Renee biked four times as far this month as last month”? 4 x right-arrow 4 boxes with x
ANTONII [103]

Answer:

i think it is c or d

Step-by-step explanation:

4 0
3 years ago
The Fish and Game Department stocked a lake with fish in the following proportions: 30% catfish, 15% bass, 40% bluegill, and 15%
vagabundo [1.1K]

Answer:

1) \chi^2 =\frac{(112-150)^2}{150}+\frac{(95-75)^2}{75}+\frac{(210-200)^2}{200}+\frac{(83-75)^2}{75}=16.313

2) p_v =P(\chi^2_{3}>16.313)=0.000978

And we got the same decision reject the null hypothesis at 5% of significance.

Step-by-step explanation:

Previous concepts

The Chi-Square test of independence is used "to determine if there is a significant relationship between two nominal (categorical) variables". And is defined with the following statistic:

\chi^2 =\sum_{i=1}^n \frac{(O-E)^2}{E}

Where O rpresent the observed values and E the expected values.  

State the null and alternative hypothesis

Null hypothesis: The distribution  is 30% catfish, 15% bass, 40% bluegill, and 15% pike

Alternative hypothesis: The distribution  is NOT 30% catfish, 15% bass, 40% bluegill, and 15% pike

The observed values are given by the table given:

Catfish =112, BAss = 95, Bluegill=210, Pike=83

Calculate the expected values

In order to calculate the expected values we can use the following formula for each cell of the table

E = \% Grand total

E_{Catfish}=500*0.3=150

E_{Bass}=500*0.15=75

E_{Bluegill}=500*0.4=200

E_{Pike}=500*0.15=75

Part 1: Calculate the statistic

\chi^2 =\frac{(112-150)^2}{150}+\frac{(95-75)^2}{75}+\frac{(210-200)^2}{200}+\frac{(83-75)^2}{75}=16.313

\chi^2 =16.313

Calculate the critical value

First we need to calculate the degrees of freedom given by:

df= (categories-1)=(4-1)= 3

Since the confidence provided is 95% the significance would be \alpha=1-0.95=0.05 and we can find the critical value with the following excel code: "=CHISQ.INV(0.95,3)", and our critical value would be \chi^2_{crit}=7.815

We can calculate also the p value:

p_v =P(\chi^2_{3}>16.313)=0.000978

And we got the same decision reject the null hypothesis at 5% of significance.

5 0
2 years ago
The graph below plots the values of y for different values of x: plot the ordered pairs 1, 3 and 2, 4 and 3, 9 and 4, 7 and 5, 2
faltersainse [42]

Answer:

x and y have a weak, positive correlation

Step-by-step explanation:

:)

7 0
3 years ago
Other questions:
  • 5. What is the factored form of 3x^2 + 21x – 24?
    5·1 answer
  • Which points are solutions to the system of inequalities shown below? Check all that apply.
    5·1 answer
  • 0=x2+4x-5 using zero product property
    11·1 answer
  • Algebra 2 homework help please!
    15·1 answer
  • In the quadratic formula,
    8·1 answer
  • Please do 9,10,11,12 fast please
    7·1 answer
  • Event A: lands on a number greater than 4
    15·2 answers
  • - What is the value of x - y in the system below?
    8·1 answer
  • It took you 120 minutes to work 15 math problems. How long did you spend on<br> each problem
    13·2 answers
  • Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. The rational function h
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!