Homework3 Deadline: Oct. 12, 2017, at 1:30 PM 1. Data table ID BodyTemp 96.3 96.
ID: 3594409 • Letter: H
Question
Homework3 Deadline: Oct. 12, 2017, at 1:30 PM 1. Data table ID BodyTemp 96.3 96.7 96.9 97 97.1 97.1 97.2 Male Male Male Male Male Male Male HeartRate 70 71 74 80 73 82 Type the letter of variable type on the right in the box next to the matching variable on the left. BodyTemp Gender HeartRate a. categorical - nominal b. quantitative- interval c. categorical -ordinal d. quantitative ratio 2. A sample from a population should be representative c. biased d. all of the above 3. A medical researcher wants to determine if patients at a hospital during a particular time frame had their medication list reviewed in accordance with hospital policies. From the entire set of 5,000 patients admitted to the hospital during that time, the researcher selects a sample of 200 patients. Type the letter of the description on the right to the matching term on the left. - simple randomi sample _convenience sample a, all 5,000 patients b. the 200 selected patients c. the first 200 patients admitted to the hospital during this time frame populationn -sample d. 200 patients whose patient ID numbers were selected at random from the 5,000 4. Select the correct set of definitions for the following symbols: a. population standard deviation, sample mean, sample standard deviation, population mean b. sample standard deviation, sample mean, population mean, population standard deviation c. population mean, population standard deviation, sample mean, sample standard deviation d. population standard deviation, sample standard deviation, sample mean, population mean 5. Type the letter of the variable type on the right next to the appropriate variable description on the left the number of students in a class hair color (black, brown, gray, red) -income (low, medium, high) the numbers on athletes' team shirts the height of trees in a forest a. categorical (ordinal) b. quantitative (discrete) c. categorical (nominal) d. quantitative (continuous) name (Adam, Becky, Christina, Dave..)Explanation / Answer
1.
b ID
c Body temperature
a gender
d heart rate
Interval variable: a meaningful measurement between two variables, sometimes used as another name for a continuous variable.
Ordinal variable: a variable there is a clear order example, income levels of low, middle, and high could be considered ordinal.
Categorical variable: variables than can be put into categories.
Ratio variables: similar to interval variables, but has a meaningful zero.
2.
d all of the above
Representative samples match up to population in very general ways. For example, if your class had 20 girls and 10 boys, then a representative sample size would include twice as many girls as boys.
It is impossible to get truly representative samples. In that case, random samples are best.
In a biased sample, a non-random sample of a population (or non-human factors) in which all individuals, or instances, were not equally likely to have been selected.
3
d simple random sample
c convenience sample
a population
b sample
A random sample in which each member of the subset has an equal probability of being chosen.
A convenience sample is made up of people who are easy to reach.
sample a small group that represents the others.
4
answer is c
sigma population standard deviation
mu population mean
time out
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