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
Lilit [14]
3 years ago
12

Data was collected from a simple random sample of 200 cell phone users age 18 or older in the United States. Each user was categ

orized by age-group and by whether he or she uses a certain cell phone app. The table shown summarizes the data, with expected cell counts in parentheses.
Uses Cell Phone App
Yes No Total
Age-Group Young Adults 4 (15.2) 76 (64.8) 80
Older Adults 29 (19.38) 73 (82.62) 102
Elderly Adults 5 (3.42) 13 (14.58) 18
Total 38 162 200
Which statement is true about whether the conditions for a chi-square test for independence have been met?
A. All necessary conditions are satisfied to apply a chi-square test for independence between age group and texting use by cell phone users.
B. The data from the different age groups are not the result of independent random samples; therefore, the conditions for the test are not met
C. The total sample size in one or more of the age-groups is too small to meet the conditions of the chi-square test for independence.
D. Not all of the observed cell counts are large enough to satisfy the conditions for the chi-square test for independence.
E. Not all of the expected cell counts are large enough to satisfy the conditions for the chi-square test for independence
Mathematics
2 answers:
frutty [35]3 years ago
6 0

Answer:

D

Step-by-step explanation:

i took it

Oduvanchick [21]3 years ago
3 0

Answer:

d

Step-by-step explanation:

my stats teacher went over it

You might be interested in
In how many ways can you spell the word ROOM in the grid below? You can start on any letter R, then on each step you can step on
Zina [86]

Answer:

  84? Not sure but pretty sure

Step-by-step explanation:

In a straight line, the word can only be spelled on the diagonals, and there are only two diagonals in each direction that have 2 O's.

If 90° and reflex turns are allowed, then the number substantially increases.

Corner R: can only go to the adjacent diagonal O, and from there to one other O, then to any of the 3 M's, for a total of 3 paths.

2nd R from the left: can go to either of two O's, one of which is the same corner O as above. So it has the same 3 paths. The center O can go to any of 4 Os that are adjacent to an M, for a total of 10 more paths. That's 13 paths from the 2nd R.

Middle R can go the three O's on the adjacent row, so can access the three paths available from each corner O along with the 10 paths available from the center O, for a total of 16 paths.

Then paths accessible from the top row of R's are 3 +10 +16 +10 +3 = 42 paths. There are two such rows of R's so a total of 84 paths.

6 0
3 years ago
Read 2 more answers
HELP PLEASE. For parallelogram LMNO, if m∠L = 3x - 25 and m∠N = 2x - 10, find m∠M.
Dvinal [7]
In a parallelogram opposite angles are congruent, that means:

Angle L = Angle N, replace L & N by they respective value, then

3x-25 = 2x-10 ==> x=15 , Now plug the value of x in any of the 2 sides
3(15) -25 =20°

hence Angle L =- Angle N = 20°

Now let's calculate Angle M. In a parallelogram the adjacent angle are supplementary, that means their sum = 180°, then

Angle N + Angle N = 180°==> Angle M = 180°-20° = 160°
5 0
3 years ago
Will Mark Brainliest!!!!!!
astraxan [27]
You want to find the value of x for which the area under the curve to the left of x is 0.6. One way to do that is to create the cumulative distribution function (CDF) for the given PDF, then see where it is equal to 0.6.

Doing that, we find a = 5.

5 0
3 years ago
1) Ben has been 30 minutes late to work on each of the last 7 days. The number of hours that he has been late will be deducted f
IrinaVladis [17]
The to the question is 3.5 hours
5 0
2 years ago
Read 2 more answers
If i is raised to an even power than I can’t simplify to be <br> i <br> 1 <br> -1
son4ous [18]

Answer:

i

Step-by-step explanation:

i^ even power

i^2 = i*i = -1

i^4 = =1

So raised to an even power, it will be either 1 or negative 1

raised to an odd power it will be either i or -i

4 0
3 years ago
Other questions:
  • How to solve y=-x+3 y=2x-1
    15·2 answers
  • while visiting a mountain, John approximated the angle of elevation to the top of a hill to be 25 degrees. Alfter walking 350 fe
    14·1 answer
  • 1. Kim's age is twice that of her sister. When you add Kim's age to her sister's age, you get 36. How old is each sister? (a) Wr
    13·2 answers
  • 3. Sam has a total of 22 quarters and nickels. The coins total value is $2.90. How many quarters and nickels does he have?​
    15·1 answer
  • Find the first three common multiplies<br> 6 and 8​
    13·1 answer
  • What is the answer of this question I need to know now
    14·1 answer
  • Expression z divide by 5 then add 3
    15·1 answer
  • Someone solve number 8 pleaseeeee
    5·2 answers
  • Sydney took a trip to a relative’s house for Thanksgiving. She drove 65 miles per hour for 1. 5 hours and 55 miles per hour for
    13·1 answer
  • What is the radius of 3 inches in a circle what is the radius?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!