A proofreader checked 160 ads for grammatical errors.The sample frequency distribution is shown below. 
Under the null hypothesis of a uniform distribution,the expected number of times we would get 0 errors is
Definitions:
Positive Over Negative
The preference or predominance of positive experiences or thoughts over negative ones.
Freud
Sigmund Freud, an Austrian neurologist, established psychoanalysis as a technique for treating mental disorders through conversation between a patient and a psychoanalyst.
Psychotherapy
A form of treatment aimed at improving mental health and well-being by discussing and exploring issues with a trained therapist.
Older Adults
Individuals who are in the later phase of their life, often defined as being 65 years of age or older, focusing on aspects related to aging and senior living.
Q11: The _ is an arithmetic mean of
Q38: When the sample variance is computed as
Q47: Which proportion is largest in a z
Q58: Which statement is most nearly correct regarding
Q63: A researcher compares the amount of college
Q72: In a normal distribution a score of
Q77: A researcher records the number of job
Q92: Correlation analysis primarily measures the degree of
Q96: In a right-tailed test comparing two proportions,the
Q120: In simple linear regression,the coefficient of determination