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A researcher is interested in the relationship between leisure time physical activity, diet, extracurricular activities and hours of sleep with cardiovascular fitness in children ages 6 through 12. She will recruit 100 children to participate in the study. Cardiovascular fitness will be assessed via a 6-minute walk test. Leisure time physical activity, diet, extracurricular activities and hours of sleep will be assessed through questionnaires completed by their parents.
What are the dependent variables, difference/relationship, and independent variables. And Why?
A national Retail Foundation survey found housholds intended to spend an average of $932 during the December holiday season. Assume that the survey included 850 households and that the standard deviation of the sample is $215.
More than 1 million skin cancers are expected to be di- agnosed in the U.S. this year-almost half of all cancers diagnosed. The prevalence of skin cancer is attribut- able in part to a history of unprotected or under-pro- tected sun exposure. Sunscre..
Discuss carefully the assumptions that you are making in carrying out this test.
the time it takes a cell to divide called mitosis is normally distributed with an average time of one hour and a
An analysis of regression measures the variability of which variable (X or Y)? Describe regression variation in terms of variation in Y.
A random sample of 200 people was taken. Sixty percent of the people favor President Obama. The 95% confidence interval for the true population of people who favor Obama is?
two marbles are chosen at random from a box that contains 5 red and 5 blue balls. if the balls are the same color you
If a quality control officer inspects a sample of ten (10) electrical appliances, what is the probability that one (1) is defective. Assume independent sampling. The quality control officer expects to find one (1) defective appliance in each batch of..
Define the experiment and describe one sample point. Assume that you need to describe only the two jurors chosen and not the order in which they were selected. List the sample space associated with the experiment.
A violation of the assumptions for a given inferential statistical test influences the results. When the research does not have independence of samples
Why is the facilitator's role so important when conducting one of the information gathering methods?
You have landed nine sales contracts with an average price of $3,782 and a standard deviation of $1,290. Identify a reasonable idealized population.
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