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Question: Herbal medicine. Researchers for the Herbal Medicine Council collected information on people's experiences with a new herbal remedy for colds. They went to a store that sold natural health products. There they asked 100 customers whether they had taken the cold remedy and, if so, to rate its effectiveness (on a scale from 1 to 10) in curing their symptoms. The Council concluded that this product was highly effective in treating the common cold.
a) Identify the W's of these data.
b) Identify the variables, classify each as categorical or quantitative, and specify units if relevant.
c) Are you confident about the Council's conclusion? Explain.
A graduating student keeps applying for jobs until she has three offers. The probability of getting an offer at any trial is 0.48.
Are the factors to be considered fixed effects? Does it seem reasonable that if you were to repeat the survey, you would select the same sexes and species?
Correlation is used to determine the strength of a relationship between two variables. What kind of variables? Quantitative ones. The result of a correlation will be a number ranging between -1 and 1.
In the 1880s-1920s schools began to teach the history of the Civil War in American classrooms. In those classsrooms teachers described the Civil War as the Lost Cause War. What is that and what was its purpose? What was the consequence of teach..
given a standardized normal distribution with a mean of 0 and a standard devication of 1 determine the following
Do you think that all random samples taken from the same population will lead to the same result?
Identify the significance level, the test statistic, and the critical value, state whether you are rejecting or failing to reject the null hypothesis statement and explain how the results could be used by the manager of the company.
1. the correlation between two variables is 0.8 for a sample of 10 observations. we wish to show there is a positive
Making cappuccino. A large chain of coffee shops records a number of performance measures. Among them is the time required to complete an order for a cappuccino, measured from the time the order is placed. Suggest some plausible examples of each o..
A Nissan Motor Corporation advertisement read, "The average man's I.Q. is 107. The average brown trout's I.Q. is 4. So why can't man catch brown trout?"
one important use of regression line is to do which of the following?a. to determine the strength of a linear
The four-wheel-steering automobile has several benefits. The system gives the driver a greater degree of control over the automobile. The driver gets a more forgiving vehicle over a wide variety of conditions.
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