An investigator wants to test whether exposure to secondhand smoke before 1 year of life is associated with development of childhood asthma (defined as asthma diagnosed before 5 years of age). Give two possible study designs.
nitraiddQ
Answered question
2020-11-01
Answer & Explanation
liingliing8
Skilled2020-11-02Added 95 answers
Two study design can be used for this scenario:
(i) Two-Sample Independent t-test:
This test is used because:
(a) It is very easy to interpret the output of independent samples.
(b) A small number of subjects for independent t-test samples are required.
(c) T-test enables us to compare the average values of the two data set samples and determine whether the sample subjects come from the same population.
(d) The test gives you all the information you need to know about the population.
Step 2
(ii) Two samples Paired t-test:
This test is used because:
(a) T-test repeated measure design results in small effects since the amount of error from samples is very small.
(b) Only one group is available for testing and this can result in less noise of data.
(c) Only one value from each subject is needed, it requires values of subjects from the two sample groups on a quantitative variable.
(d) Standard software programs that support statistical functions like Microsoft Excel can be used to calculate t-test data.
New Questions in High school statistics
Read carefully and choose only one option
A statistic is an unbiased estimator of a parameter when (a) the statistic is calculated from a random sample. (b) in a single sample, the value of the statistic is equal to the value of the parameter. (c) in many samples, the values of the statistic are very close to the value of the parameter. (d) in many samples, the values of the statistic are centered at the value of the parameter. (e) in many samples, the distribution of the statistic has a shape that is approximately NormalConstruct all random samples consisting three observations from the given data. Arrange the observations in ascending order without replacement and repetition.
86 89 92 95 98.Find the mean of the following data: 12,10,15,10,16,12,10,15,15,13.
The equation has a positive slope and a negativey-intercept.
1) y=−2x−3
2) y=2−3x
3) y=2+3x
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Fill in the blanks to make the statement true: .
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The first 15 digits of pi are as follows: 3.14159265358979
The frequency distribution table for the digits is as follows:
Which two digits appear for 3 times each?
A) 1, 7
B) 2, 6
C) 5, 9<br<D) 3, 8How to write
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What number is 12% of 45?
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Leasing a car. The price of the car is$45,000. You have $3000 for a down payment. The term of the lease is and the interest rate is 3.5% APR. The buyout on the lease is51% of its purchase price and it is due at the end of the term. What are the monthly lease payments (before tax)?
The mean of sample A is significantly different than the mean of sample B. Sample A: Sample B: Use a two-tailed -test of independent samples for the above hypothesis and data. What is the -value?
What is mean and its advantages?
