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
Gre4nikov [31]
3 years ago
9

A recent survey of cell phone users indicated that 56 percent of the respondents prefer to use cell phones for texting rather th

an for making phone calls. A 95 percent confidence interval for the estimate of all cell phone users who prefer to use cell phones for texting has a margin of error of 3 percent.
Assume al contions for inference have been met. Based on the confidence where which of the following claim is supported?

A. Less than half of all people prefer texting
B. More than half of all people prefer texting
C. At least 60 percent of all people prefer texting
D. At least 75 percent of all people prefer texting
E. At least 95 percent of all people prefer texting
Mathematics
2 answers:
levacccp [35]3 years ago
8 0

Given Information:

mean = μ = 56%

margin of error = σ = 3%

Confidence Level = 95%

Required Information:

Range of mean with 95% confidence Level = ?

Answer:

Range of mean with 95% confidence Level = 50% to 62%

Step-by-step explanation:

We know that within 95 % confidence interval, the data will fall within 2 standard deviations from the mean

μ ± 2σ

We have mean μ = 0.56 and standard error σ = 0.03

0.56 + 2*0.03 and 0.56 - 2*0.03

0.56 + 0.06 and 0.56 - 0.06

0.62 and 0.50

or

50% to 62%

Conclusion:

Since the percentage is 50 or greater, option B best fits the scenario, more than half of all people prefer texting

We are 95% confidence that 50 to 62 % of the the respondents prefer to use cell phones for texting rather than for making phone calls.

mrs_skeptik [129]3 years ago
6 0

Answer:

(B) More than half of all people prefer texting.

Step-by-step explanation:

Confidence interval for a proportion is given as sample proportion +/- margin of error

sample proportion (p) = 56%

margin of error (E) = 3%

Lower limit = p - E = 56% - 3% = 53%

Upper limit = p + E = 56% + 3% = 59%

The percentage of half of all people is 50%

95% confidence interval of the proportion of all people who prefer texting is (53%, 59%). This interval shows that more than half of all people prefer texting.

You might be interested in
What is the distance between these two points
irakobra [83]

Answer:

pretty sure it is 11

7 0
3 years ago
Shelby bought 2 cans of paint and 3/4 of a pint of special paint additive formulated to reduce mildew. Before painting her house
DIA [1.3K]
She put 2/4 in each can
3 0
1 year ago
Donavin has 5,734 baseball cards in his collection if each protective sheets does Donavin need? I NEED HELP
statuscvo [17]
Donavin would need 383 protective sheets
STEP BY STEP
If each sheet can hold 15 cards you would take 5,734 divided by 15 which gets you 382.26666
You would round up so all the cards have sheets
7 0
3 years ago
6+[11-{10+2-(8 of 2+1-3×4) }]
Vesna [10]

Answer:

17

Step-by-step explanation:

Step-by-step explanation:

6+[11-{10+2-(8×2+1-3×4)}]

6+[11-{10+2-(8×2+1-3×4)}]6+[11-{10+2-(12)}

6+[11-{10+2-(8×2+1-3×4)}]6+[11-{10+2-(12)} ]6+[11-[10+2-12}]

6+[11-{10+2-(8×2+1-3×4)}]6+[11-{10+2-(12)} ]6+[11-{10+2-12}]6+[11-{0}]

6+[11-0]

6+[11]

6+11

17 Ans.

7 0
2 years ago
Tell whether the relation is a function. Explain your reasoning
kodGreya [7K]

Answer:

no, since the numbers are mixed up both negative and positive

3 0
2 years ago
Read 2 more answers
Other questions:
  • When rolling a fair number cube with numbers 1 through 6, what is the probability of rolling a number greater than 5?
    13·2 answers
  • On a recent road trip, Johnny was able to drive 360 miles on 12 gallons of gas. a. What is the average gas mileage for Johnny’s
    12·2 answers
  • What is p^m ⋅ p^n equal to? p^m − n p^m + n p^m ⋅ n p^m ÷ n. please show work
    10·1 answer
  • Suppose that you are standing on a train accelerating at 0.20g. What minimum coefficient of static friction must exist between y
    7·1 answer
  • 6 less than a number is greater than 4
    5·2 answers
  • Given that a= (4) and b= (2)<br> (7) (4)<br> If
    6·1 answer
  • Where does x go in the fraction?<br>15/100 = ?/?<br>​
    7·2 answers
  • Answer all the questions for a bunch of points, no scam answers please
    15·1 answer
  • Help pleassssee
    15·1 answer
  • <img src="https://tex.z-dn.net/?f=2y%5Csqrt%7Bx-y%7D%20%2Bx%5Csqrt%7B%5Cfrac%7B1%7D%7Bx-y%7D%20%7D%20-a%5Csqrt%7B%5Cfrac%7Ba%7D%
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!