![subject](/tpl/images/cats/mat.png)
Mathematics, 09.04.2021 01:40 jairus34
Suppose that insurance companies did a survey. They randomly surveyed 440 drivers and found that 320 claimed they always buckle up. We are interested in the population proportion of drivers who claim they always buckle up.
Part A
i. x =
ii. n =
iii. p' =
b. Define the Random Variables X and P', in words.
c. Which distribution should you use for this problem? Explain your choice.
d. Construct a 95% confidence interval for the population proportion who claim they always buckle up.
i. State the confidence interval.
ii. Sketch the graph.
iii. Calculate the error bound.
e. If this survey were done by telephone, list three difficulties the companies might have in obtaining random results.
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Other questions on the subject: Mathematics
![image](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 21:30, myhomeacc32
Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?
Answers: 1
![image](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 23:00, brittneyrenae7338
What is the value of x in the equation7x+2y=48 when y=3
Answers: 2
![image](/tpl/images/cats/mat.png)
Mathematics, 22.06.2019 03:50, jescanarias22
Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.
Answers: 3
You know the right answer?
Suppose that insurance companies did a survey. They randomly surveyed 440 drivers and found that 320...
Questions in other subjects:
![Konu](/tpl/images/cats/mat.png)
Mathematics, 11.04.2021 23:30
![Konu](/tpl/images/cats/biologiya.png)
Biology, 11.04.2021 23:30
![Konu](/tpl/images/cats/himiya.png)
![Konu](/tpl/images/cats/fizika.png)
Physics, 11.04.2021 23:30
![Konu](/tpl/images/cats/biologiya.png)
![Konu](/tpl/images/cats/mat.png)
Mathematics, 11.04.2021 23:30
![Konu](/tpl/images/cats/mat.png)
Mathematics, 11.04.2021 23:30
![Konu](/tpl/images/cats/mat.png)
Mathematics, 11.04.2021 23:30
![Konu](/tpl/images/cats/ekonomika.png)
Business, 11.04.2021 23:30
![Konu](/tpl/images/cats/biologiya.png)
Biology, 11.04.2021 23:30