biostats final

a team of physicians monitor blood pressure in patients who are on a standard treatment and in patients who are using a new experimental drug. Testing for a drop in blood pressure, they find that a t-test yields a result that is significant at a p value of 0.0222. Since their determined a value for the test was 0.05, we may conclude

they may have committed a type I error

requirements for running an analysis of variance (ANOVA), do not include

equal sample sizes

assume that the probability of having a boy is 0.5. what is the probability of have three children, two of which are boys and one of which is a girl

3/8

which of the following is NOT a measurement of dispersion of the data

mode

assume that the probability of having a boy is 0.5. in a family that has three girls and one boy, what is the likelihood that a fifth child will be a body

50%

a table value of statistic that is compared to a calculated value of a statistic is called the

critical value

which of the following statements is true regarding a correlation

the value of one variable clearly does not determine the value of another variable

the chi-square (x2) test is used

to compare frequency distribution

when tossing a six-sided die once, what is the probability of getting either a 2 or 3

1/3

a histogram is

a frequency diagram involving a continuous variable

which of the following statements I true

homogeneity of variance (homoscedasticity) and normality of data are prerequisites for performing a parametric procedure

within group variance refers to

the variance due specifically to experimental error

if I were to change each data point in my data set by taking the log of each point

that would be apporotpaite is needed to address homogeneity of variance

a t-test is

a parametric test used to compare two groups of data

which of the following statements is true

the less likely one is to commit a type I error, the more likely one is to commit a type II error

regarding central limit therom, which of the following is not true

the standard deviation of the population of sample means is equal to the standard deviation of the original population

which of the following symbols indicates the standard deviation of a population

o-

the mean of a sample is considered a

descriptive statistic denoting location of the data along the x-axis

why does a researcher include many replicates in his experiment

to better estimate mu