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More than half of all residents would prefer tolls on all motorways to be reduced by 25 cents, rather than receiving a $100 lower annual registration cost for their cars. Also assume that this was based on a poll where 562 of 1,040 participants indicated that they would rather have the reduced motorway tolls.
(a) Is there evidence that more than half of residents would rather have motorway tolls reduced by 25 cents than have their annual car registration lowered by $100. Justify with a hypothesis test at the 5% significance level.
The scatter plot shows the relationship between hours spent studying and exam scores. The line shown is the calculated line of best fit.
discuss the implications of magnitude from 0 to 1 sign or - and probability versus causality for the correlation
one environmental group did a study of recycling habits in a california community. it found that 71 of the aluminum
1. Drawing a red card and drawing a jack on one draw from a standard deck of 52 playing cards
1. Researchers tested farm-raised salmon from two different farms for organic contaminants. One measure they collected was the concentration of the carcinogenic insecticide mirex (parts per million).
Calculate the sample statistics and determine whether there is evidence that the mean blackness is less than 0.97. Write a memo to management that summarizes your conclusions.
supposed that battery failure time measured in hours has a probability density function give by fx2x13. compute the
fran believes that the odds in favor of her team winning the basketball game tomorrow are 9 to 7. what is the
your restaurant serves an average of 23 customers per half hour. what is the probability that during the next half hour
Suppose you are to analyze the ages of 377 randomly selected employees, ranging from 26 to 58. Using Sturge's formula, find the appropriate number of classes from the sample.
a sales manager collected the following data on annual sales and years of experience. sales
The following set of data: 25, 18, 23, 16, 16, 14, 22, 17, 9, 32, 22, 12, 18, 9, 28, 14, 22, 18, 16, 12, 31, 17, 12, 14, 16, 30, 12, 12, 10, 24, 12, 11
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