English language proficiency

Reference no: EM131017706

A study was conducted to determine if the inclusion of a foreign language requirement in high schools may have a positive effect on a students' performance on standardized English exams. From a sample of 100 high schools, 50 of which had a foreign language requirement and 50 that did not, it was found that the average score on the English proficiency exam was 25% higher for the students having a foreign language requirement. What confounding variables may be present that would invalidate the conclusion that requiring a foreign language in high school increases English language proficiency?

Reference no: EM131017706

Questions Cloud

Estimate the proportion of adult residents : A political scientist wants to estimate the proportion of adult residents of a state who favor a unicameral legislature. What could be sampled? Also, discuss the relative merits of personal interviews, telephone interviews, and mailed questionnair..

A history of indexing : The relevance to Development Strategies section should offer an insight-building summary, recommendations, findings and conclusion - A history of indexing

Opinions of employees on industry vacation policy : An industry consists of many small plants located throughout the United States. An executive wants to survey the opinions of employees on the industry vacation policy. What would you suggest she sample?

Average water consumption per family in city : An experimenter wants to estimate the average water consumption per family in a city. Discuss the relative merits of choosing individual families, dwelling units (single-family houses, apartment buildings, etc.), and city blocks as sampling units.

English language proficiency : What confounding variables may be present that would invalidate the conclusion that requiring a foreign language in high school increases English language proficiency?

Find a confidence interval for the students who own a car : When 311 college students are randomly selected and surveyed, it is found that 116 own a car. Find a 99% confidence interval for the true proportion of all college students who own a car.

Major cause of inner city schools : The newspaper columnist suggested that the lack of advanced mathematics courses in high school curriculums in inner city schools was a major cause of inner city schools having a low success rate in college. What confounding variables may be presen..

How network sample voters to approximate random sampling : A local TV network wants to run an informal survey of individuals who exit from a local voting station to ascertain early results on a proposal to raise funds to move the city-owned historical museum to a new location. How might the network sampl..

How do we see these differences between the genders : How does Levinson's theory of life structures contrast with Erickson's stages - what types of differences do you see between these two theories?

User Account

All Pages