Chi-square test of goodness of fit-grade distribution

Assignment Help Basic Statistics

Reference no: EM13107861

A professor in the psychology department would like to determine whether there has been a significant change in grading practices over the years. It is known that the overall grade distribution for the department in 1985 had 14% A's, 26% B's, 31% C's, 19% D's and 10% F's. A sample of n=200 psychology students from last semester produced the following grade distribution:

A B c D F
--------------------------------------------------
32 61 64 31 12
------------------------------------------------------
Do the data indicate a significant change in the grade distribution? Test at the .05 level of significance.

Reference no: EM13107861

Questions Cloud

Chi-square test of goodness of fit-gender distribution : The college theater department recently staged a production of a modern musical. A researcher recorded the gender of each student entering the theater and found a total of 385 females and 215 males.

Information about nonparametric tests : Under what conditions should you use the Chi-Square Test to determine whether there is a difference between proportions of two independent populations?

Finding probability based on gravity model : The hunt is on: Rich's 13 year old daughter Alexandra is going to give him an introductory trombone concert later in the day, and he wants to purchase earplugs before then.

What is an example of a person from history : What is an example of a person from history that provides both a naturalistic and personalistic explanation for that event.

Chi-square test of goodness of fit-grade distribution : A professor in the psychology department would like to determine whether there has been a significant change in grading practices over the years.

Determine how the biological bases of behavior play a role : Select a human behavior (everything is open to discussion, from skydiving, to watching a movie, to aggravated assault) and determine how the biological bases of behavior play a role in that behavior. Provide specific examples to support your respo..

Key feature of the production function : The key feature of the production function is that the marginal impact of capital per worker k = K/L on Y/L decreases as K/L increases.

Describe the possible evolutionary : Discuss hunger in terms of internal and external influences. Describe the possible evolutionary and societal contributions to America's current difficulties with obesity and eating disorders.

Describe the human sleep cycle and the brain structures : Describe the human sleep cycle and the brain structures and processes that influence it. Also describe two scientific hypotheses about the nature and purpose of REM sleep and dreaming.

User Account

All Pages