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Although an exhaust fan is present in nearly every bathroom, they often are not used due to the high noise level. This is an unfortunate practice because regular use of the fan results in a reduction of indoor moisture. Excessive indoor moisture often results in the development of mold which may lead to adverse health consequences. Consumer Reports in its January 2004 issue reports on a wide variety of bathroom fans. The following table displays the price (P) in dollars of the fans and the quality of the fan measured in airflow (AF), cubic feet per minute (cfm).
a. Plot the data in a scatterplot and comment on the relationship between price and airflow.
b. Compute the correlation coefficient for this data set. Is there a strong or weak relationship between price and airflow of the fans?
c. Is your conclusion in part (b) consistent with your answer in part (a)?
d. Based on your answers in parts (a) and (b), would it be reasonable to conclude that higher priced fans generate greater airflow?
1. the daily flow rate of contaminant from an industrial plant is modeled by a normal random variable with a mean value
The snowball strikes the ground if it doesn't strike anything else while falling? (b) A man 1.9 m tall is standing 4 m from the edge of the barn. Will the snowball hit him?
three cards are randomly selected without replacement from an ordinary deck of 52 playing cards. compute the
the man of mass m1 88 kg and the woman of mass m2 62 kg are standing on opposite ends of the platform of mass m0 124
Utilizing the 5% level of significance was there a significant change in cholesterol level. Elucidate your answer to someone who has never ever taken a course in statistics.
a crossover trial is conducted to compare an experimental medication for migraine headaches to a currently available
Assuming this is literally true, how can it be explained? What facts / statistics would you need to know to expose this misleading claim?
Construct a 90 percent confidence interval for the true mean weight. (b) What sample size would be necessary to estimate the true weight with an error of � 0.03 grams with 90 percent confidence?
Perform a complete test of hypotheses to determine if there is evidence to claim the tires produced by Machelin wear out too fast. Include a P-value with the test.
At the .10 significance level, can we conclude that there is a difference in the amounts quoted?
If 8 women are randomly sampled, what is the probability that 0 through 8 of the women are employed outside the home?
according to a recent survey about 33 of americans polled said that they would likely purchase reusable cloth bags for
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