Problem 1B Determination of Confounding Factors using a Test of Independence Age and CVD Frequencies Age Incident CVD No CVD Total 45 (36 555 <50 600 50+ 339 400 61 106 Total 894 1000 B. Is age independent of incident CVD? Perform a y2 test of independence Remember to document the five steps used in hypothesis testing. C. Why is age a confounding factor in this example?

Question

Question 1B 

part b and c in photo

Problem 1B Determination of Confounding
Factors using a Test of Independence
Age and CVD Frequencies
Age
Incident CVD
No CVD
Total
45 (36
555
<50
600
50+
339
400
61
106
Total
894
1000
B. Is age independent of incident CVD? Perform a y2 test of independence
Remember to document the five steps used in hypothesis testing.
C. Why is age a confounding factor in this example?
Expand
Transcribed Image Text

Problem 1B Determination of Confounding Factors using a Test of Independence Age and CVD Frequencies Age Incident CVD No CVD Total 45 (36 555 <50 600 50+ 339 400 61 106 Total 894 1000 B. Is age independent of incident CVD? Perform a y2 test of independence Remember to document the five steps used in hypothesis testing. C. Why is age a confounding factor in this example?

Expert Answer

1 Rating

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Math
Statistics

Hypothesis Testing

Related Statistics Q&A

Find answers to questions asked by students like you.

Q: Explain how the following two terms differ from each other: MSwithin-treatments and MSerror

A: We have to explain how MS within-treatment and MS Error

Q: Two fair dice are rolled, one blue, (abbreviated B) and one red, (abbreviated R). Each die has one o...

A: Note:Hey there! Thank you for the question. The Venn d=Diagram that you have posted is in image form...

Q: 1. If X ~ B (n, p) with E (X) = 3 and V (X) = 2.4) calculate P (X&gt; = 3) 2.An aptitude test consis...

A: Hey, since there are multiple questions posted, we will answer first question. If you want any speci...

Q: What is the value of ΣX for the scores 2, 5, 3?

A: Given data2,5, 3ΣX = 2+5+3 = 10

Q: The weight of a type of dog follows Normal distribution with mean of 10 pounds and standard deviatio...

A: It is given that the weight of dog is normally distributed with mean 10 pounds and standard deviatio...

Q: Computers are commonly used to randomly generate digits of telephone numbers to be called when condu...

A: A nonstandard normal distribution cannot be used because the randomly generated digits themselves do...

Q: Problem 6

A: In a multiple linear regression model, an explanatory variable is said to be most important if it ha...

Q: Facebook provides a variety of statistics on its Web site that detail the growth and popularity of t...

A: It is given that mean and standard deviation are 28 and 5, respectively.

Q: Please show TI 84 steps

A: From the given information, the alternative hypothesis is µ&lt;6. That is, the given test is left ta...

Q: What is the formula for this standard deviation?   What does the central limit theorem say about the...

A: Solution:Standard deviation:The variation between each observation from its mean is known as standar...

Q: Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the...

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...

Q: In 2008, the Detroit Lions set an NFL record by losing all 16 regular season games. Suppose that the...

A: It is given that n =16.Here, probability of winning an individual game is 0.10.

Q: (a) Make a scatter diagram of the data. ​(b) Use the regression feature of a calculator to find the​...

A: Hey! Thanks for the question. Since we only answer up to three sub parts, we will solve first three....

Q: A population of values has a normal distribution with μ=135.9 and σ=18.1. You intend to draw a rando...

A: Given data  Mean μ=135.9Standard deviation σ=18.1Size (n) = 96a)score separating the bottom 61% scor...

Q: Please see picture

A: In this context, it is assumed that the n students are selected at random without replacement from a...

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of...

A: Introduction:The sampling distribution of the sample mean, X̅ from a population with normal distribu...

Q: Illustrate a venn diagram for ( D U E) c (intersection, upside down U) F sets: D ( b,a,c,k).      E ...

A: Given sets areD= {b, a, c, k}E= {t, a, s, k}F= {b, a, t, h}Universal set U is = {a, b, c, h, k, s, t...

Q: How can graphics and/or statistics be used to misrepresent data?

A: Graphical representation or statistical data can be misleading or misrepresented. Some statistics ca...

Q: Sociologist say that 90% of married woman have issues with their husband's mother and it is the bigg...

A: Preliminary calculations:The given scenario follows binomial distribution.The probability of success...

Q: According to scientists, the cockroach has had 300 million years to develop a resistance to destruct...

A: Obtain the critical value at 95% confidence level:It is given that,Sample mean = 10,693/5,000=2.1386...

Q: Based on all student records at Camford University, students spend an average of 5.5 hours per week ...

A: Hey, since there is multiple subpart questions posted, we will answer first three subparts. If you w...

Q: A survey asked buyers whether color, size, or brand influenced their choice of cell phone. How many ...

A: This problem involving 3 sets : Color, Size and Brandn(Color)=5n(Size)=8n(Brand)=16n(Color and Size)...

Q: Suppose the distribution of speeds of cars traveling on the I-5 in California is nearly normal with ...

A: Solution:a.The percentage of cars travel above the speed limit is obtained below:Let the random vari...

Q: Problem 1: If X1, X2, ... , Xn are a random sample from a population with mean u and variance o2, us...

A: Introduction:The method of moments estimator equates the population moments with the corresponding s...

Q: 3. A medical researcher examined the number of asthma attacks patients had both before and while usi...

A: Hello there! there are more than three subparts in the question. According to our policies we cannot...

Q: State the appropriate null hypothesis H0 and alternative hypothesis Ha in each of the following case...

A: From the given information, it can be observed that the null and alternative hypothesis area shown b...

Q: I need help on this question. Toby's Trucking Company determined that on an annual basis, the distan...

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...

Q: Test the claims using the traditional method of hypothesis testing.   According to a recent poll, 53...

A: It is given that the population proportion; P is  (=0.53). In the survey, it is found that the rando...

Q: About 8% of the population has a particular genetic mutation. 1000 people are randomly selected.Find...

A: From the given information, about 8% of the population has a particular genetic mutation and there a...

Q: Sulfur compounds cause "off‑odors" in wine, so winemakers want to know the odor threshold, the lowes...

A: Given data set is,30, 30, 42, 35, 22, 33, 31, 29, 19, 23Sample size (n) = 10

Q: A research poll showed that 1282 out of 2040 randomly polled people in a country favor the death pen...

A: Confidence interval:A range of values such that the population parameter can expected to contain for...

Q: The weight of a type of dog follows Normal distribution with mean of 10 pounds and standard deviatio...

A: Given Information:

Q: for a normal distribution with a mean of 7 and a stanard deviation of 6, the value 10 has a z value ...

A: It is given that mean and standard deviation are 7 and 6, respectively.

Q: A pediatrician obtains the heights of her 200 three-year-old female patients.  The heights are norma...

A: It is given that the height of female patients is normally distributed with mean 37.8 inches and sta...

Q: Assume the random variable X has a binomial distribution with the given probability of obtaining a s...

A: Given datan = 18p= 0.8Applying Binomial theoremProbability of x success out of n trial is given by

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those sc...

A: Solution: We are given that IQ scores of adults are normally distributed with mean = 100 and standar...

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those sc...

A: From the given data, mean (μ) =100 and standard deviation (σ) =15And x=96 from the given graph

Q: Problem 29 d.

A: The null and alternative hypotheses are given below:H0: µ = 21.62Ha: µ ≠ 21.62Procedure to find samp...

Q: Test the given claim using the P-value method of hypothesis testing.   The health of employees is mo...

A: Introduction:Denote μ as the true mean weight of the population, from which, the sample of 54 is obt...

Q: For the standard normal distribution shown on the right, find the probability of z occurring in the ...

A: The probability value is 0.1977 and it is calculated below:

Q: Today, the waves are crashing onto the beach every 5.3 seconds. The times from when a person arrives...

A: Let X be the random variable uniformly distributed between 0 and 5.3 seconds.Denote X as the time fr...

Q: is there is a main effect of disposition, would Tuckey's HSD need to be calculated

A: If there is a main effect of disposition, Then in this case, Turkey’s HSD need to be calculated. It ...

Q: Given a population where p = 0.10, find the standard deviation of the samping distribution when n = ...

A: It is given that p is 0.10 and n is 500.

Q: 1-Var-Stats     x =79     Σ x=2291     Σx2 =182,361     Sx=7     σx=6.878251582  ...

A: It is given that the sample mean and standard deviation are 79 (=2,291/29) and 7.

Q: Part A, D, E, G

A: Note:Hi there! Thanks for posting the question. As your question does not contain Part G, we had ans...

Q: Find the area of the shaded region. The graph depicts the standard normal distribution of bone densi...

A: The required area is the right tailed probability of a standard normal distribution greater than –1....

Q: Suppose that Felisha is a librarian, and she read in a scholarly journal that the number of words in...

A: It is given that the standard deviation is 102.0, sample size is 20 and the level of confidence is 0...

Q: According to the Center for Disease Control and Prevention (CDC), the mean life expectancy in 2015 f...

A: It is given that the mean is 71.8, the population standard deviation is 15, sample size is 100 and t...

Q: #4: Suppose that X1,... , X7n is an i.i.d. random sample drawn from a U[a, 1] uniform distribution, ...

A: Click to see the answer

Q: Question 3 of 7 Game consoles: A poll surveyed 341 video gamers, and 109 of them said that they pref...

A: It is given that in the survey, it is found that 109 out of 341 video gamers said that they prefer p...