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
dolphi86 [110]
3 years ago
7

A study of injuries to in-line skaters used data from the National Electronic Injury Surveillance System, which collects data fr

om a random sample of hospital emergency rooms. The researchers interviewed 160 people who came to emergency rooms with injuries from in-line skating. Wrist injuries (mostly fractures) were the most common.
(a) The interviews found that 53 people were wearing wrist guards and 7 of these had wrist injuries. Of the 107 who did not wear wrist guards, 49 had wrist injuries. Why should we not use the large-sample confidence interval for these data? One count is only 7, and the guidelines for using the large-sample method call for all counts to be at least 25. The counts are only 7 and 49, and the guidelines for using the large-sample method call for all counts to be at least 100. The counts are only 7 and 49, and the guidelines for using the large-sample method call for all counts to be at least 50. One count is only 7, and the guidelines for using the large-sample method call for all counts to be at least 10.

(b) The plus four method adds one success and one failure in each sample. What are the sample sizes and counts of successes after you do this? Population Sample size Number of successes wrist guards no wrist guards

(c) Give the plus four 95% confidence interval for the difference between the two population proportions of wrist injuries. (Use pguards − pno guards. Round your answers to four decimal places.)

Mathematics
1 answer:
Katarina [22]3 years ago
8 0

Answer:

(a)  One count is only 7, and the guidelines for using the large-sample method call for all counts to be at least 10.

Step-by-step explanation:

Attached is the solution to b and c

You might be interested in
Wren and Jenni are reading the same book. Wren is on page 12 and reads 7 pages every night. Jenni is on page 8 and reads 11 page
Igoryamba
You should make a table
8 0
3 years ago
4 pounds of grapes cost $11.52. what is the unit rate?
Zepler [3.9K]

Answer: 2.88/1

Step-by-step explanation:

3 0
3 years ago
What is the answer to 7/10+ 1/2
trapecia [35]

Answer:

12/10 or 1 1/5

Step-by-step explanation:

1/2 = 5/10

7/10 + 5/10 = 12/10 or 1 1/5

5 0
2 years ago
Help :( i came into class late ​
Setler [38]

Answer:

If this isnt right im sorry but i think that it is the last answer

sorry if i got it wrong please tell me

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Write each ratio 3 different ways
Alenkasestr [34]

Answer:

I don't know the number of the ratio but i will create an example of 3 ways to write ratio

Let's use the number 10:8

you can write it like

  • 10:8 (colon)
  • 10 to 8
  • 10/8 ( a fraction)
7 0
2 years ago
Other questions:
  • F(x)=1.01(2)x rate of change from x=12 to x=15
    9·1 answer
  • From the ten books that you've recently bought but not read, you plan to take four with you on vacation. How many different sets
    12·1 answer
  • Which line of reflection maps triangle MNO onto its image?
    7·2 answers
  • Find the slope of the line that passes through the given points
    15·2 answers
  • Find the area of a shaded region. Express in factored form​
    14·1 answer
  • This table shows some values of an exponential function. x у 01.25 1 2.50 25 3 10 What is the function?​
    13·1 answer
  • CAN SOMEONE PLEASE WRITE AN EQUATION TO THIS! I WOULD VERY MUCH APPRECIATE IT!
    6·1 answer
  • Please help I’m really stressed
    5·1 answer
  • Constance ran 620 meters around 4 sides of a square field. How many meters long was each side of the field?
    7·1 answer
  • Eric practice for his piano recital 3/4 hour every day last week. How many hours did Eric practice last week
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!