Professor york randomly surveyed 240 students at oxnard university, and found that 150 of the students surveyed watch more than 10 hours of television weekly. develop a 95% confidence interval to estimate the true proportion of students who watch more than 10 hours of television each week. the confidence interval is

a. 533 to .717 b. 564 to .686 c. 552 to .698 d. 551 to .739
(b) .564 to .686 for this. i need on the question below

how many additional students would professor york have to sample to estimate the proportion of all oxnard university students who watch more than 10 hours of television each week within+/- 3% with 99% confidence?

a. 761
b. 1001
c. 1488
d. 1728

B. .564 to .686

C. 1488

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of , and a confidence interval , we have the following confidence interval of proportions.

In which

Z is the zscore that has a pvalue of .

For this problem, we have that:

Professor York randomly surveyed 240 students at Oxnard University, and found that 150 of the students surveyed watch more than 10 hours of television weekly. This means that

95% confidence interval:

So , z is the value of Z that has a pvalue of , so .

The lower limit of this interval is:

The upper limit of this interval is:

The correct answer is:

B. .564 to .686

How many additional students would Professor York have to sample to estimate the proportion of all Oxnard University students who watch more than 10 hours of television each week within+/- 3% with 99% confidence?

With 99% confidence level, we have

The margin of error is:

So

The correct answer is:

C. 1488

step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v