199 Answered Questions for the topic biostatistics

Biostatistics

06/01/19

In biostatistics, what is the difference between random distribution and normal distribution?
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Biostatistics

05/25/19

Medical Research: What is the advantage of using a competing risk model as opposed to a standard Cox regression?
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Biostatistics

05/24/19

If the ratio of (A+G/T+C) in one strand of DNA is 0.70, what is the same ratio in complimentary strand?
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Biostatistics

05/03/19

What is the central limit theorem in biostatistics?
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Biostatistics

04/23/19

Statistics experts, what is the best trick or little "story" for remembering the definitions of Type 1 errors and Type 2 errors?
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Biostatistics

04/19/19

can this be found? or is there not enough information?

Let X be a random variable that represents the number of accidents at an intersection and assume X has a Poisson distribution within mean of 3.8 accidents per month what is the mean number of... more
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Biostatistics

04/19/19

what is the formula for the false positive and how do i calculate the predictive value positive?
Neuroblastoma is a rare serious but treatable disease. The prevalence of this disease is 6.3%. Study of the screening test for neuroblastoma the VMA test a urine test gave the following... more
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Biostatistics

04/19/19

tried this problem but im stuck and done know what im doing wrong please help

The time it takes broken arms of adults to heal is normally distributed with a mean of 53.7 days in a standard deviation of 5.2 days. Answer the following questions based on this... more
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Biostatistics

04/19/19

not sure how to formulate this

In the US the percentage of adults who have had an appendectomy is 28%. A simple random sample of 42 adults and the US is taken. Calculate the probability of the proportion of adults who have had... more
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Biostatistics Math Statistics Mathematics

03/30/19

Binomial Probability Question
In 2009, a study from a consumer research company reported that 54% of teenagers sent a text message on their cell phone during the past 30 days. A sample of 15 teenagers is studied. Round the... more
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Biostatistics Epidemiology

03/18/19

What are the five objectives of epidemiology?
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Biostatistics Epidemiology

03/18/19

What is the scope of epidemiology?
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Biostatistics Epidemiology

03/18/19

Can biostatistics determine susceptibility to disease?
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Biostatistics Epidemiology

03/18/19

What is the principle of epidemiology?
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Biostatistics Epidemiology

03/18/19

What are the two types of epidemiology?
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Biostatistics Pharmacology

03/13/19

How can biostatistics inform pharmaceutical research?
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Biostatistics Pharmacology

03/12/19

____ is a pill or treatment designed to look just like the active treatment but with no active ingredients.
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Biostatistics

12/10/18

Which test should I use to find the difference..(between dichotomous and cat barb with 5 levels) ask to choose caseses if greater or equal to 1. Need to run both parametric and non parametric

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Biostatistics Probability

10/23/18

What is my expected winnings?
A box contains 7 black blocks, numbered 1-7, and 7 yellow blocks, numbered 1-7. You randomly select two blocks, without replacement without regard to color. The absolute difference of the numbers... more
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Biostatistics

10/22/18

BIOSTATISTIC QUESTION
Mr. Ibrahim is responsible for maintaining clean linen for the hospital. The hospital has a contract with a laundry company to clean all dirty linen. He has been informed that the hospital is doing... more
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Biostatistics

10/21/18

what is the minimum weekly stock he should keep so he can be prepared at a level of 99% of all demands.? (show calculations)
Mr. Ibrahim is responsible for maintaining clean linen for the hospital. The hospital has a contract with a laundry company to clean all dirty linen. He has been informed that the... more
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Biostatistics

09/20/18

The event of getting a red ball
A box has fifteen balls in it, nine white and six red. We select one ball, do not put it back in the box, and select a second ball. So we are selecting two balls from the box. Find the probability... more
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Biostatistics

05/22/18

a tomatoe plant population has a height, which are normally distributed with a mean of 80 cm and a standard deviation of 5 cm. what is the proportion of plant w
a tomatoe plant population has a height, which are normally distributed with a mean of 80 cm and a standard deviation of 5 cm. what is the proportion of plant with heights:less than 72cm?Between... more
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Biostatistics

12/17/17

At least one of your answers is incorrect. A stemplot represents quantitative data by separating each value into the stem​ (such as the leftmost​ digit) and the
At least one of your answers is incorrect. A stemplot represents quantitative data by separating each value into the stem (such as the leftmost digit) and the leaf (such as the rightmost digit).... more
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Biostatistics

12/05/17

Biostatistics question
3. Suppose a researcher is interested in the random variable detailing average distance for patients traveled to the nearest health center decides to carry out a Z test. He collects a simple random... more
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