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Question: Validity of a scale to measure daily intake of fat. Privitera and Freeman (2012) constructed a scale to measure or estimate the daily fat intake of participants; the scale was called the estimated daily intake scale for fat (EDIS-F). To validate the assertion that the EDIS-F could indeed estimate daily intake of fat, the researchers tested the extent to which scores on the scale could predict liking for a high-fat food (as would be expected if the scale were measuring daily fat intake). Liking was recorded such that higher scores indicated greater liking for the food. The researchers found that liking for the high-fat food (Y) could be predicted by scores on the EDIS-F (X) using the following regression equation: Y = 1.01X + 4.71. Using this regression equation:
(a) Is the correlation positive or negative? Explain.
(b) If a participant scores 40 on the EDIS-F, then what is the expected liking rating for the high-fat food?
To test the hypothesis that the average price is $14.25 versus the alternative hypothesis that it is not $14.25, a random sample of 16 daily prices is collected. The results are x‾ = $16.50 and s = $5.8. Using α = 0.05, can you reject the null hyp..
Considering the simple case of linear regression analysis (one dependent and one independent variable) please share a couple of limiting and empowering factors related to this important tool.
For a relative risk of 1.53, what is the percent increase in risk?- For a percent increase in risk of 140%, what is the relative risk?
Identify and determine each missing path probability.- Find P(A ∩ B ∩ C) and P(Ar ∩ B ∩ Cr).- Find P(C). Are the events B and C independent? Justify your answer.
The key steps to tests of significance are to state H0 and HA, calculate the test statistic, compute the pvalue, and make a conclusion based on the given significance level.
the speed of cars mph or mileshour on ca-60 freeway follows a normal distribution. a highway safety researcher believes
The sameple you found that 114 of those adults sampled over the age of 24 smoke. Develop a 95% condience interval for the current porportion of adults over the age of 24 who smoke.
Let a new random process. - Plot all three autocorrelation functions.. - Determine all three PSD functions analytically and plot the PSDs.
Exercise 8 The table below gives data on moisture content for specimens of a certain type of fabric. Determine control limits for a chart with center line at height 13.00 based on σ = .600, construct the control chart, and comment on its appearanc..
Calculate the 95% confidence interval for the number of admissions at the hospitals based on your sample of 50 and explain what the confidence interval represents in the context of the problem.
1.suppose we are testing the null hypothesis h0 micro 50 and the alternative ha micro ne 50 for a normal population
Suppose you estimate a regression model to predict weekly expenditures on food per person. Would you be pleased if your model estimate a Standard Error =$300 EXPLAIN?
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