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
forsale [732]
3 years ago
9

A random sample of 160 car crashes are selected and categorized by age. The results are listed below. The age distribution of dr

ivers for the given categories is 18% for the under 26 group, 39% for the 26-45 group, 31% for the 45-65 group, and 12% for the group over 65. Calculate the chi-square test statistic
χ to test the claim that all ages have crash rates proportional to their driving rates.
1. Under 26 = 66 drivers
2. 26-45 = 39 drivers
3. 46-65 = 25 drivers
4. Over 65 = 30 drivers
Mathematics
1 answer:
sasho [114]3 years ago
5 0

Answer:

25.05

Step-by-step explanation:

Given that a random sample of 160 car crashes are selected and categorized by age. The results are listed below. The age distribution of drivers for the given categories is 18% for the under 26 group, 39% for the 26-45 group, 31% for the 45-65 group, and 12% for the group over 65.

     

<26 26-45 46-65` >65  

Observed  O 66 39 25 30 160

Expected  E 40 40 40 40 160

     

Chi square      

(O-E)^2/E 16.9 0.025 5.625 2.5 25.05

Thus we get chi square test statistic = 25.05  

You might be interested in
Elina and Gustavo leave Cayley H.S. at 3:00 p.m. Elina runs north at a constant speed
Andrej [43]

Answer:

the answer to your question is 'b'

8 0
2 years ago
Can someone help???​
inn [45]

Answer:

help is for the weak as said my I, the one true burnt chicken nugget

Step-by-step explanation:

5 0
3 years ago
If you find this, it was an accident
Anna007 [38]
Alright, lols yes yes
6 0
2 years ago
Farmer McKinney has a plot of tomato plants. There are 5 tomato plants in the first row, 6 tomato plants in the second row, 9 to
jok3333 [9.3K]
There will be 30 tomatoes in row six. Let me know if i'm right.
3 0
3 years ago
Consider this system of linear equations:
Hatshy [7]
I believe the answer is D. because -12 + -1 equal -13 
5 0
3 years ago
Other questions:
  • What is the domain and range for f(x)=2/3x-3​
    6·1 answer
  • Bradley's lemon cookie recipe calls for 2/3
    7·1 answer
  • How many solutions are there for 12x+32=12-7
    13·1 answer
  • 1 Harry Potter but cost $20. To purchase the whole set of seven books it would take 6 times as much. How much would it cost to b
    15·2 answers
  • As a summer job , Randall jui can work at the amusement park earning $8.75 an hour to 20 hours a week, or as busboy at restauran
    5·2 answers
  • Solve the simultaneous equations<br> y = 9 - X<br> y = 2x2 + 4x + 6
    6·1 answer
  • HELP ME ASAP PLSLSLSS HELP MEEE IMA CRY
    15·1 answer
  • What does Expression, Unit form and Standard Form mean?
    14·1 answer
  • Bobby can run 2/8 mile in 2 1/4 minutes. If he maintains that pace, how long will it take him to run 1 mile?
    10·2 answers
  • Which of these is NOT an arithmetic sequence?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!