PPRAG 1672 9.22.22

Degress in Fahrenheit is an example of which type of continuous scale?

Calculate the median from the following set of numbers: 5,3,4,5,14,2

Which of the following are true regarding inferential statistics?

Assume a normal distribution, sample mean=100 and SD=10. 68% of cases would fall between which of the following?

Which of the following is the distribtuion that would be obtained from gathering multiple samples?

Probability of type 2 error = 100% - Power of the test

Number of days until cure is an example of which of the following?

Sample=280 patients, mean days to resolution=50, standard deviation=8What range do 95% of patients fall?

If you increase the number of cases, you will get more precision and a narrower confidence interval

Sample=280 patients, mean days to resolution=50, standard deviation=8How many cases have values exceeding 66?

Sample=280 patients, mean days to resolution=50, standard deviation=8What range do 68% of patients fall?

If analysis are underpowered, what type of error will occur?

Which of the following is the best measure of variation with distribtuion is skewed?

Refers to non-ordered categories:

The probability of rejecting a false null hypothesis (finding statistical significance when the result is significant)

Cluster samples are used when no list is available. You select groups and then people within those groups.

Using a list of Midwestern students sorted in random order, selecting every 10th student is an example of

Pearson Chi-Square Test

Distribution refers to the way in which observations are arrayed when plotted in two-dimensional space.

Which of the following are equal in normal distribution?

Yes verus no is an example of which of the following?

If you increase variability, the confidence interval will widen

In an adequate sample size(power),Fisher's Exact Test will be statistically significant if actual deviates from expected

Range is from the highest to lowest value.

The average, sum of values divided by N cases

Which of the following is used for nominal or ordinal variables?

If the probability is less than the alpha, the null hypothesis is rejected, and the result is statistically significant

Standard deviation is the standardized measure of variability, calculated based on cubed distances.

A positive pregnancy test result for a patient who is a 90-year-old man is an example of

Sampling distribution is the distribution of a statistic.

If observed P is < alpha, the result is statistically significant

The interquartile range is the range from ____ to ____ %ile.

The hypothesis that the relationship between or among the study variables is not as hypothesized by the investigator.

Calculates probability of obtaining the observed results if the null hypothesis is true

Pearson correlation is not affected by outliers and should be used for normal distributions

The point that divides the distribution into two parts, such that an equal number of values fall above& below that point

For any single statistical test, the probability of type 2 error=alpha

Which of the following accurately describes the picture below?

"Drug A and placebo are actually the same" is an example of which of the following?

Consists of categories that are ordered but not equidistant

The most commonly occurring value

A negative test when the patient actually has the disease is an example of

Select all of the true statements

Gaussian distribution refers to a skewed distribution.

A survey with the categories: dislike, neutral, like, is which of the following?

Which of the following is estimated from sample statistics?

Rejecting the null hypothesis when the null hypothesis is actually true (false positive)

You have separate lists of U of A and ASU students and use a random number generator to select 200 students from each:

Height, age, and blood pressure are all examples of which of the following type of continuous scale?

Given the following values, calculate the mean: 4,4,4,6,6,7,9,9,10

Which of the following accurately describes the picture below?

Nominal variable with only two possible values

Given the following values, calculate the mode: 4,4,4,6,6,7,9,9,10

Racial groups are an example of which of the following?

Select the true statement(s) regarding between group differences:

Standard deviation is not sensitive to extreme values.

The range within which the population value is likely to fall, estimated at a specific probability

Consists of equidistant categories

Failing to reject the null hypothesis when the null hypothesis is actually false (false-negative)

Given the following values, calculate the median: 4,4,4,6,6,7,9,9,10

95% of cases are within how many standard deviations from the mean?