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A maker of a certain brand of low fat cereal bars claims that the average saturated fat content is 0.5 grams. To check the claim, a random sample of 9 cereal bars of this brand were drawn, and the sample mean and sample standard deviation was found to be 0.52 and 0.2, respectively. If the computed t-value falls between -talpha/2 and talpha/2, the maker is satisfied with the claim. (t0.05=1.860 for df=8).
a) What is the sampling distribution of the sample mean Xbar?
b) Use the sampling distribution to find P(Xbar > 0.52).
How many additional records have to be gathered.
Is this a one- or two-tailed test?
The text tells us that a Pearson correlation coefficient is a measure of the strength and direction of a linear relationship between two variables. A scatter plot provides a visual representation of the relationship. Do not take examples from text.
A friend did the (Correlation Analysis - Data Interpretation) for me and I cannot get a hold of him to get the missing output. Can you please redo it and I will increase the amount
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Plot each of the predictors against the response. Plot the predictors against each other. The purpose here is to get a graphical idea of the relationships in the data.
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Consider the following situation: Data Set A: Average = $157 Standard Dev. = $84 Data Set B: Average = 34 oz. Standard Dev. = 21 oz
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A researcher is asked to determine whether or not a productivity objective (in dollars) of better than $75,000 per employee is possible. A productivity test is done involving 20 employees. What conclusion would you reach? The sales are as f..
Dependent t test
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