When conducting a retrospective cohort study what are some possible selection and information bias one can encounter especially because we have to use existing data? how can they be avoided or minimized (mitigated) during the study study design to avoid them?

Q: The probabilities that a dispositor will invest Php100,000, Php250,000., or Php180,000 are and, resp...

A:

Q: In sample 400 parts manufactured by a factory, the number of defective parts was found to be 30. The...

A:

Q: government agency wishes to estimate the proportion of drivers aged 16-24 who have been involved in ...

A:

Q: Which of the following is(are) TRUE if the coefficient of determination between the response and the...

A: Here use basic of coefficient of determination and regression line

Q: LET'S APPLY ACTIVITY 3.3 MATHSELFIE A. State whether the z-score locates the raw score X within a sa...

A: As per our guidelines we are suppose to answer only one questionA)1)Givenx=50sample standard deviati...

Q: A qualitative variable with three classes (X, Y, and Z) is measured for each 20 units randomly sampl...

A: Given : A qualitative variable with three classes (X, Y, and Z) is measured for each 20 units random...

Q: Example 13.15. The following table gives the distribution of students and also of regular players am...

A:

Q: Sometimes the research hypothesis is considered to be Question 5 options: the exciting ...

A: Sometimes the research hypothesis is considered to be

Q: Among a group of 28 stocks, suppose that 14 will perform above average and the other 14 will perform...

A:

Q: Gyuri performed an analysis of Simvastatin tablets. The following are the data she obtained: 39.5 mg...

A: Given that, Gyuri performed an analysis of Simvastatin tablets and the following are the data she ob...

Q: Mary and Carol are summer interns working as proofreaders for a local newspaper. Based on the aptitu...

A:

Q: when you should use T test

A: Given: T-test

Q: The content of two urns is as given below: -Urn (U1): x red balls and (y+1) black balls Urn (U2): (y...

A:

Q: Calculate the standard errors of ˆα and βˆ.

A: Answer: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-pa...

Q: I. Given the Table 1, compute for the following: 1. Estimate the standard deviation of the given dat...

A: Given Information: Consider the data of astigmatism in 1033 young men age 18-22, Degree of Astigm...

Q: Consider the following sample data for two variables. x 19 7 у 2 9 9 0 5 8 19 a. Calculate the sampl...

A:

Q: Given the specification 90±15, the probability of nonconforming (to the spec) made by a normally dis...

A:

Q: Create a frequency give for the frequency distribution using the chart for reference.

A: The following data is given: Batting averages Frequency 0.180-0.199 2 0.200-0.219 9 0.220-0...

Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)...

A: We have given that,  a=-1.34, b=36.954 and r^2=0.96628, r=-0.983  

Q: Suppose that a drug company wishes to test the effects of five new compounds on the growth rate of w...

A: Given information: The data represents the values corresponding to the factors Litter and Compound.

Q: Two letters are chosen, without replacement, at random from the English alphabet. If y is considered...

A: The number of letters chosen is 2. The number of alphabets is 26. The number of vowels is 5. The num...

Q: Temperature and Age Babies First Crawl 36 34 32 30 28 26 24 22 20 30 40 50 60 70 80 Average Monthly ...

A: Here graph is given between temperature and age babies first crawl. We have to choose correct statem...

Q: Example 2-4. Find the simple and weighted arithmetic mean of the first n Natural numbers, the weight...

A:

Q: b) The following table shows the time students from a college took to complete a marathon. Time (min...

A: As per our guidelines we can solve first three sub part of question and rest can be reposted. Soluti...

Q: Which of the following is the response variable in the study? Drug groups, children, serum alkaline ...

A: Introduction: It is required to identify the response variable, and find the value of the test stati...

Q: The Department of Animal Regulations released information on pet ownership for the population consis...

A: We have given that  Probability function.  Value of x 0 1 2 3 5 5 Probsbility 0.52 0.22 0.13 ? ...

Q: 1. Estimate the interval for the population proportion from each of the following. Then interpret th...

A: Given: a) X=500, n=812 95% confidence b) X=842, n=1200 95% confidence c) X=523, n=972 99% confidence

Q: A random sample of 447 students were resent surveyed regarding their class standing( freshman, sopho...

A:

Q: A box has 12 balls, 4 are red and 8 are green.  Randomly choose 3 balls from the box without replace...

A: We have given that,  Total balls = 12  Red balls = 4  Green balls = 8  Then,  We will find the proba...

Q: stributed with a mean of 100 and a standard deviation of 16. Find the proportion of people in the ge...

A:

Q: particular professor has noticed that the number of people, P, who complain about his attitude is de...

A: Here given data for, Number of people who complaint about his attitude if he drinks n number of cups...

Q: Let X and Y be independent normally distributed random variables with X- N(19,3°), Y N(-20, 4"). Com...

A: Given that  X~N( μ = 19, ?2=32 ) Y~N( μ = -20, ?2=42 ) Z-score =( x - μ )/? Note: According to bartl...

Q: Find the mean and standard devlation for each blnomlal random varlable: a. n= 35, 7= .70 (Round your...

A: (a) Given that, n = 35, π=0.70 The values of mean and standard deviation are,

Q: A college conducted both day and evening classes intended to be identical A sample of 100 day studen...

A:

Q: A researcher conducts a two-tailed hypothesis test with an alpha of 0.05 and obtains a z statistic o...

A: The test is two-tailed.

Q: 24 hour fitness wants to administer a satisfaction survey to its current members. Using its membersh...

A: Given : 24 hour fitness wants to administer a satisfaction survey to its current members. Using its ...

Q: For Question 10 to 14: A random sample of 90 adults is classified according to gender and the number...

A: It is needed to check, whether the time spent watching Netflix is independent of whether the viewer ...

Q: Consider a Morhne chain on tates: O1,2,3,45.with the fellowing t molohility motrix . trensition 0.4....

A:

Q: I. Given the Table 1, compute for the following: 1. Estimate the standard deviation of the given dat...

A: Variance : A applied math measure of the dispersion between values in an exceedingly information ass...

Q: A larger treatment effect means the hypothesis test has more power. True or False?

A: Power of the test explains the chance of not happening type II error. It is the correct rejection of...

Q: A part-time employee works for 1, 2 or 3 hours per day, each with a probability of 1/3. The number o...

A: If happening/not happening of one event does not affect the happening/not happening of other event, ...

Q: Which of the following is(are) TRUE if the coefficient of determination between the response and the...

A: Given info: The coefficient of determination between the response and the predictor variables is 0.8...

Q: REM sleep time of x1 = 2.9 hours per night. From previous studies, it is known that ?1 = 0.7 hour. A...

A: Given that  Sample size n1=8 Sample mean=2.9 hours  Standard deviation σ1=0.7 Sample size (n2)=8 adu...

Q: How do you find the mean and median from a frequency chart ?

A: Frequency chart is the representation of frequency of various outcomes in a sample. **  Frequency ch...

Q: A survey was given to a group of 10,000 students to determine whether they wanted an outdoor swimmin...

A: The union of events A and B is defined as n(A ∪ B) = n(A)  + n(B) – n(A ∩ B).

Q: a) The box and whisker plot below summaries the number of computers fixed per day by a technician in...

A: Given : Box plot

Q: Calculate the 75% percentiles, 25% percentiles, and the IQR for the following data:   9, 12, 20, 5...

A: Given : Observation 9 12 20 5 14 7 16 13

Q: The following is based on information from The Wolf in the Southwest: The Making of an Endangered Sp...

A: Givenx=11sample size(n)=37p^=xn=1137=0.2973α=0.01claim is that the popualtion proportion of female w...

Q: A study shows a strong positive correlation between the number of firefighters at a fire site and th...

A: Explain the given statement  can conclude that more firefighters cause more damage .

Q: Application of mean The average salary of male employees in a firm was $520 and salary of female was...

A: