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biostatistic

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biostatistic
Thanks for your help.

biostatistic
can we use t-test for two independent sample and dichotomus study with less than five success or failures?

Biostatistic
The following replicate calcium determinations on a blood sample using atomic absorption spectrophotometry (AAS) and a new colorimetric method were reported. Is there a significant difference in the precision of the two methods?

biostatistic
is it true that it is more difficult to reject a null hyputhesis if we use a 10 %level of significance compared with a 5% level of significance?

biostatistic
Is this statement true or false: when calculating correlation coefficient between two continous variables, the scale on which the variables are measured affect the value of the correlation coefficient.

biostatistic
I am sorry, I do not know how one question is printed so many times. There was some problem in submission of question and when it is submitted, it is printed so many times.

biostatistic
The average per capita spending on health care in the United Statesis $5274. If the standard deviation is $600 and the distribution of health care spending is approximatelynormal, what is the probability that a randomly selected person spends more than $6000? Find the limits ...

biostatistic
recent suggestion is 60 min of exercise per day. A sample of 50 adults in a study of risk factor report exercising a mean of 38 min per day with a standerd deviation of 19 min .based on sampal data, is physical activity significantly less than recommended? Run the appropriate ...

Biostatistic
An enzymatic method for determining alcohol in wine is evaluated by comparison with a gas-chromatography (GC) method. the same sample is analyzed several times by both methods with the following results (% ethanol). Enzymatic method: 13.1, 12.7, 12.6, 13.3, 13.3. GC method: 13...

biostatistic
is it true that sample size required to detect an effect size of 0.25 is larger than the sample size required to detect an effect size of 0.05 with 80% power ansd a 5% level of signisicance?

biostatistic
there are 200 subjects enrolled to receive either experimental medications or placebo. At the end of study following data is collected after 6 week. (sd)= standard deviation. BP= blood pressure. experimental meds placebo (n=100) (n=100) Mean BP 120.2(sd 15.4) 131.4(sd18.9) ...

Biostatistic
A study is conducted in patient with HIV. Lower CD4 count is associated with advance disease. The researcher is interested in finding out the relation between supplement vitamins and CD4 count. A multiple regression analysis is performed relating CD4 count to the use of ...

Biostatistic
A study is conducted in a patient with HIV.Lower CD4 count is associated with advance disease. A researcher is interested in the association between vitamin supplement and CD4 count.A MULTIPLE REGRESSION ANALYSIS is performed relating CD4count to the use of supplements(coaded ...

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