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Question: The convenience of eating. Wansink, Painter, and Lee (2006) tested whether visibility and proximity influence consumption of chocolates. They placed 30 Hershey's kisses either covered or uncovered (visibility) in a container on top of a desk or 2 meters from a participant (proximity). Do the data in the figure given here support their hypothesis that the more proximate and visible the chocolates, the more chocolates participants would eat? Explain.
Construct a scatterplot for the data. What type of relationship, linear or curvilinear, appears to exist between failure time and solder temperature?
A random sample of 61 observations produced a sample mean of 95. Using α=0.025, would you reject the null hypothesis? The population standard deviation is known to be σ=11.
If there is evidence that percentage of polished lenses that contain surface defects does not exceed 2%. A random sample of 240 lenses contains 5 defective lenses.
a machine produces ball bearings is set so that the average diameter is .50 inch. a sample of 10 ball bearings was
Dolly Trolleys manufacture trolleys for a chain of supermarkets. Demand for trolleys is buoyant, so all production can be sold. Two models are produced by Dolly
suppose that a random sample of 41 state college students is asked to measure the length of their right foot in
Discuss the methods of presentation of data through graphs and diagrams. Discuss the various types of graphical presentation of data.
in 1990 the mean height of women 20 years old age or older was 63.7 inches with a standard deviation of 2.1 inches
Explain why the problem called "using the wrong sampling frame" might lead to a biased estimate of the abundance of cactus in the desert.
Suppose a 1/2-pack-or-more-of-cigarettes-a-day smoker has a 200% increased risk of a certain type of serious facial skin condition. How do you interpret this?
Although cities encourage carpooling to reduce traf?c congestion, most vehicles carry only one person. For example, 70% of vehicles on the roads in the Minneapolis-St. Paul metropolitan area are occupied by just the driver.
Explain whether or not each of the following would ever differ for two random samples of the same size from the same population.- The sample mean x‾.
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