webassign

hello i have calculus course using webassign 

3 chapters each chapter 20 questions due tommorow 

i need someone used webassign before 

Place this order or similar order and get an amazing discount. USE Discount code “GET20” for 20% discount

QUIZ-3

IHP 525 Quiz One

 

Answer the following questions covering materials from previous chapters in your textbook. Each question is worth 2.5 points.

 

1.       Prospective studies on nutrition often require subjects to keep detailed daily dietary logs. In contrast, retrospective studies often rely on recall. Which method (dietary logs or retrospective recall) do you believe is more likely to achieve accurate results? Explain your response.

 

 

2.       We often have a choice of whether to record a given variable on either a quantitative or a categorical scale. How does one measure age quantitatively? Provide an example by which age can be measured categorically.

 

 

3.       Telephone surveys may use a telephone directory to identify individuals for study. Speculate on the type of household that would be undercovered by using this sampling frame.

 

 

4.       Could the number “0000” appear in a table of random digits? If so, how likely is this?

 

 

5.       Body weights of 18 diabetics expressed as a percentage of ideal (defined as body weight divided by ideal body weight x 100) are listed: {107, 119, 99, 114, 120, 104, 88, 114, 124, 116, 101, 121, 152, 100, 125, 114, 95, 117}. Construct a stem-and-leaf plot of these data and interpret your findings.

 

 

6.       Name three measures of central location.

 

 

7.       To assess the air quality in a surgical suite, the presence of colony-forming spores per cubic meter of air is measured on three successive days. The results are as follows: {12, 24, 30}. Calculate the mean and standard deviation for these data.

 

 

8.       In a lottery game, a person must select 5 numbers from a total of 40. Tracy has chosen 7, 8, 9, 10, 11. Jaime has chosen 39, 17, 37, 5, 28. Who has a greater chance of winning?

 

 

9.       In a box, there are 8 orange, 7 blue, and 6 red balls. One ball is selected randomly. What is the probability that it is neither orange nor red?

 

 

10.   A __________ is a numerical quantity that takes on different values depending on chance. There are two types of random variables. __________ form a countable set of possible values. __________ form an unbroken continuum of possible values.

 

 

Place this order or similar order and get an amazing discount. USE Discount code “GET20” for 20% discount

MISSING

1.       Accidents occur along a 5-mile stretch of highway at a uniform rate. The following “curve” depicts the probability density function for accidents along this stretch:

 

 

a)      What is the probability that an accident occurred in the first mile along this stretch of highway?

b)      What is the probability that an accident did not occur in the first mile?

c)       What is the probability that an accident occurred between miles 2.5 and 4?

 

 

2.       Suppose there were 4,065,014 births in a given year. Of those births, 2,081,287 were boys and 1,983,727 were girls.

 

a)      If we randomly select two women from the population who then become pregnant, what is the probability both children will be boys?

b)      If we randomly select two women from the population who then become pregnant, what is the probability that the first woman’s child will be a boy and the second woman’s child will be a boy?

c)       If we randomly select two women from the population who then become pregnant, what is the probability that both children will be boys given that at least one child is a boy?

 

 

3.       Explain the difference between mutually exclusive and independent events.

 

 

4.       Suppose a screening test has a sensitivity of 0.80 and a false-positive rate of 0.02. The test is used on a population that has a disease prevalence of 0.007. Find the probability of having the disease given a positive test result.

 

 

 

Place this order or similar order and get an amazing discount. USE Discount code “GET20” for 20% discount