Here the function p is diffrentiable. So it is continues. Let us
draw it on a white paper.
1)
2) Inspecting the graph, we have the fact that p is increasing from
point to point. Note that the function pocess a positive slope at
any point.
3) The function takes a positive value for the income ( None of
us a have negative income) and it could be zero. Again we can not
properly find an upper limit of someone's income. So we have to
analyse this function upto infinity.
Hence the domain is [0,∞)
4) By the defenition of the function, the least possible value
of acceptance is 45.37. Let x be a number grater than 45.37. Set
x=p=4.71+45.37
Then 4.71=x-45.37
That is,
=(x-45.37 )/4.71, positive. Then I is the positive squareroot of
this positive value.
That is p takes all the values grater than 45.37. Hence the range
is [45.37,100]
5) In this case the p-intercept is 45.37 at I=0 ( Found from inspecting the graph). In this scenario, it means that, 45.37% of people watch cable television even if they have no income.
PART B The percentage of American adults with an annual income of thousand dollars who watch...
4 Chapter 7 Test B 16. [Objective: Calculate and interpret confidence intervals for a proportion) A random sample of 950 adult television viewers showed that 48% planned to watch sporting event X. The margin of error is 4 percentage points with a 95% confidence level. Does the confidence interval support the claim that the majority of adult television viewers plan to watch sporting event X? No; the confidence interval means that we are 95% confident that the population proportion of...
a and b please
A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 4 percentage points with 95% confidence if (a) he uses a previous estimate of 28%? (b) he does not use any prior estimates? Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) n =...
A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 2 percentage points with 90% confidence if (a) he uses a previous estimate of 36%? (b) he does not use any prior estimates? (a) n(Round up to the nearest integer) (b) n (Round up to the nearest integer ) Enter your answer in each of the answer boxes Save for Later Chapter...
A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 2 percentage points with 95% confidence if (a) he uses a previous estimate of 36%? (b) he does not use any prior estimates? (a) n= (Round up to the nearest integer.) (b) n= (Round up to the nearest integer.)
A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 4 percentage points with 90% confidence if (a) he uses a previous estimate of 38%? (b) he does not use any prior estimates? Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) na (Round up to the nearest...
1 )Imagine that you are conducting a poll to determine the percentage of adults who gamble at least once a month. As your sample size increases (let us say from 100 to 400 cases), which of the following becomes true? A)Confidence interval becomes wider B)Margin of error becomes smaller C)Amount of sampling error increases D)Margin of error increases 2)The reason that you would select the option that you did above is due to what is known as _____.
1.
2.
3.
In a survey of 3256 adults aged 57 through 85 years, it was found that 88.2% of them used at least one prescription medication. Complete parts (a) through (c) below. a. How many of the 3256 subjects used at least one prescription medication? 2872 (Round to the nearest integer as needed.) b. Construct a 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication. [%<p<% (Round...
(3 points) Is college worth it? Among a simple random sample of 304 American adults who do not have a four-year college degree and are not currently enrolled in school, 137 said they decided not to go to college because they could not afford school. 1. Calculate a 90% confidence interval for the proportion of Americans who decide to not go to college because they cannot afford it, and interpret the interval in context. Round to 4 decimal places. (...
"A Watch t use 0.62/1.25 points 1 Prefous Anewe LaPCalc 10 B.018 Consider the follewing. x-3 cos 0 y5 sin 8 (a) Sketch the curve represented by the parametric equations (indicate the orlentation of the curve) y 10 -2 21 2 -10 21 -10 (b) Eliminate the parameter and write the corresponding rectangular equation whose graph represents the curve Adjust the domain of the resuting rectangular eqvation if necessary oed Heln? 0/1.25 points | Previous Answers LarPCalc8 10.6.042 6. Find...
3. A sample of seven households was obtained, and information on their income and food expenditures for the past month was collected. The data (in hundreds of dollars) are: ) Put the points into your calculator list. Use your calculator to perform linear regression. What is the correlation? Is it positive, negative, or neither? Is it strong or weak? Find the equation of the line of best fit. (c) Write a sentence that interprets the estimated slope. (d) Use your...