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
Colt1911 [192]
3 years ago
8

Suppose that several insurance companies conduct a survey. They randomly surveyed 350 drivers and found that 280 claimed to alwa

ys buckle up. We are interested in the population proportion of drivers who claim to always buckle up. (.20) n = (.20) p' = (.20) The standard deviation for sp = (.20) The z value for a 95% confidence interval is = (.20) Construct a 95% confidence interval for the population proportion that claim to always buckle Fill in the blanks to clarify the following diagram. LL (lower limit) = UL (upper limit) =
Mathematics
1 answer:
KATRIN_1 [288]3 years ago
3 0

Answer:

Lower limit = 0.76

Upper limit = 0.84

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 350

Number of drivers that buckle = 280

Formula:

p' = \dfrac{x}{n} = \dfrac{280}{350} = 0.8

q' = 1-p' = 1 - 0.8 = 0.2

The standard deviation for sp =

=\sqrt{\displaystyle\frac{p'q'}{n}}\\\\=\sqrt{\dfrac{0.8\times 0.2}{350}} = 0.02138

95% Confidence Interval:

p' \pm z_{critical}(s_p)

z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.96

Putting the values, we get,

0.8 \pm 1.96(0.02138)\\= 0.8 \pm 0.0419048\\=(0.7580952, 0.8419048)\\\approx (0.76,0.84)

Lower limit = 0.76

Upper limit = 0.84

You might be interested in
Simplify y - 3 over 3 +12
Hitman42 [59]

Answer:

y-3/15

Step-by-step explanation:

5 0
2 years ago
How is 21\30 bigger then 2\3
strojnjashka [21]
By reducing 21/30 you dived 21 and 30 by 3 and you will get 7/10. Is 7/10 larger than 2/3? If we put these fractions in decimal form we will see 7/10 turns into 0.7 and 2/3 turns into 0.667. So the answer is 21/30 is larger than 2/3.
3 0
2 years ago
In AWXY, mW<br> Find mZX<br> (2x – 12), m_X = (2x + 17), and m_Y = (9x-7)<br> Find m
sladkih [1.3K]

Answer:

45

Step-by-step explanation:

The sum of interior angles in a triangle is equal to 180

2x - 12 + 2x + 17 + 9x - 7 = 180 add like terms

13x - 2 = 180 add 2 to both sides

13x = 182 divide both side by 13

x = 14

m<X = 2x + 17 replace x with 14

2*14 + 17 = 45

5 0
2 years ago
What is sarah is twice as old as her youngest brother. if the difference between their ages is 15 years. how old is her youngest
r-ruslan [8.4K]
Her youngest brother is 15 years old.
5 0
3 years ago
Which of the following statements is true?
Hitman42 [59]
If my memory serves me well, the only wtatement which is true is the last one: <span>D) All linear equation and all quadratic equations are polynomial equations.</span>
8 0
3 years ago
Read 2 more answers
Other questions:
  • What is the gradient of the line 3y=2x-6
    8·1 answer
  • How would I find the area given these 4 points? Is there a formula that I just don't know​
    12·1 answer
  • (7 - 4n) x 6 = ?<br><br> Help me answer the question
    6·1 answer
  • What is the equation of the line in slope-intercept form the line perpendicular to y=4/9x-6 through (5,-6)
    10·1 answer
  • Is (x-3) a factor of (x^3-3x^2+2x+2)
    6·2 answers
  • Which ratio does not belong with the other three?
    6·1 answer
  • A study found that there is no direct relationship between the time that 8th-grade students spend brushing their teeth and their
    7·2 answers
  • Does anyone know the answer for this problem :P
    11·1 answer
  • Why do people hate math so much?
    5·2 answers
  • mañana iras a nadar y finalizaras el entrenamiento a las 6:15 p.m. si el entrenamiento dura 1 hora y 45 min ¿a que hora iniciara
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!