Biostats Topic 4 & 5

QUESTION 1

Using the following research question, answer all of the questions.

“A recent joint report between John Hopkins School of Public Health and the CDC indicates that 1.7% of eight year old children are on the Autism Spectrum.  If we were to randomly select nine (9) eight year olds from the Warren County school system, what is the probability that three (3) of those children is ‘on the spectrum?'”

What is your sample size?

What is the value that is represented by ‘j’?

What is the proportion of eight year old children on the Autism Spectrum within the population?

What is the proportion of eight year old children on the Autism Spectrum within our sample? 

Calculate and report the probability. 

QUESTION 2

Given the following data regarding heart disease and whether the individual’s occupation is considered blue collar or white collar:

Heart Disease+Heart Disease-Blue Collar126882008White Collar128550358

What is the probability that someone will have heart disease given that they have a blue collar occupation {P(HD+ l BC)}?

What is the probability of someone working in a white collar occupation {P(WC)}?

What is the probability of not having heart disease {P(HD-)}?

What is the probability of being in a white collar occupation and having heart disease {P(WC and HD+)}?

QUESTION 3

Interpret the results to the prior calculation in a manner that the general population would understand:

” What is the probability that someone will have heart disease given that they have a blue collar occupation {P(HD+ l BC)}? ”

 TOPIC 5: 
QUESTION 1

If the data is not normally distributed, it is referred to as ____________ (the answer is not ‘not normally distributed).

QUESTION 2

The percentage of individuals assumed to be between 1 SD and -1 SD, in a normal distribution is?45.68%90.54%68.26%80.80%

 
QUESTION 3

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QUESTION 4

You are provided with the following data regarding number of hours slept last night:

56248927384

What is the value of ‘n’?

What is the mean?

What is the standard deviation?

What is the z-score for 6?

What proportion of our population would be expected to sleep between 4 and 8 hours?

ROUND Z-SCORES TO TWO DECIMALS. ROUND ALL OTHER CALCULATIONS TO FOUR DECIMALS.