Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/23

Click to flip

23 Cards in this Set

  • Front
  • Back
How do you tell if something is skewed to the left?
away from the center
How do you tell if something is skewed to the right?
it is towards the center
What is the main differ in how to tell btwn skewed to the left or right?
(1)right-is towards the center
(2)left-is away from the center
What is the response varaible?
y
What is the predicator varaible?
x
What is a scatter?
(1)direction-postive or negative or and aproxiamte of r
(2)form- (if linear, parabolra etc)
(3)scatter=
What is a type I error?
refers to when the reseacher rejects the null hypothesis when it is correct
What is a type II error?
this is when the resreacher accepts a null hypothesis that is false
An education reseacher was interested in examining the effect of the teaching method and the effect of the particular teacher on students' scores on reading test. In study, there are four different teachers (Julina, Felix, Sona, and Helen) and three different teaching methods (method A, method B, method C). The number of students participating in the study was 258. Students are randomly assigned to a teaching method and teacher.
(1) Id the response variable method
score on the reading test
An education reseracher was interested in examining the effect of the teaching method and the effect of the particular teacher on students scores on the reading test. In study, there are four different teachers (Julina, Felix, Sona, and Helen) and three different teaching methods (method A, method B, method C). The number of students participating in the study was 258. Students are randomly assigned to a teaching method and teacher.
(1) Id the different factors in the experiment?
(1)teaching method and the teacher
Describe the scatter for

(1)air pressure and alitude
(1)air pressure (x) can be used to predict alitude (y)
(2)the direction is postive with a r of about .8
(3)form-is linear
(4)there is some scatter
DETERMINE IF OBSERVATIOAnAL OR EXPERIMENTAL STUDY
in a clincal trial, 780 participants suffering from high blood pressure were randomly assigned to one of three groups. Over a one month period, the first group recieved the experimental drug, the secound group recieved a placebo, and the third group no treatment. the diastolic pressure of each participatent was measured at the begining and end of the period and the change in blood pressure was recorded. The average change in blood pressure was caculated for each of the four groups and the averages compared
experiment
DETERMINE IF OBSERVATIOAnAL OR EXPERIMENTAL STUDY
at on hostpial in 1992, 674 women were diagnosed w breast cancer. Five years later, 88% of the women and 83% of the african american women were still alive
observational study
DETERMINE IF OBSERVATIOAnAL OR EXPERIMENTAL STUDY
A quaility control speacilist compares the output from a machine w a new lubricant to the output of other machines w the old lubricant
experiment
Find the explantory and response varaible
(1)for high grade point average and studying consistently
(1)studying consistently:explantory
(2)high GPA= response
The explantory varaible can also be called the (1)
predicator
DETERMINE IF DOUBLE BLIND,BLIND OR NOT
Do energy bar snacks improve afternoon altertness? 100 factory workers were randomly selected and assigned into 2 groups. One group ate energy snacks at lunch and the other group ate placebo snacks. At the afternoon break, a significant increase in alertness was observed.
blind
DETERMINE IF DOUBLE BLIND,BLIND OR NOT

Is the addison Alegrbra class test superior to the currrently used text book? in promoting learning of alegbra? Evaluators only are informed that Group A will test from the current text and group B will test from the AW text
blind
In a recent study, a random sample of children in grades 2 through 4 showed a signficant negative relationship btwn the amount of homework assigned and student attidues. This is an example of (1)
obeservational study
In order to take a sample of 1200 people from the population, I first divde the pop into men and women and then take a simple random sample of 500 men and a seperate sample of 700 women. This is an example of (1)
stratified random sampling
DETERMIN THE TYPE OF VARIABLE
a person gender
categorical
T or F
you can describe the distrubtion of a bar chart as being skewed to the left
false bc its categorical
DETERMINe THE TYPE OF VARIABLE
the waiting time at a bust stop in minutes
numerical