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Text Messages The table shows the number of text messages sent and received by some people in one day.
(Source: StatCrunch: Responses to survey How often do you text? Owner: Webster West. A subset was used.)
a. Make a scatterplot of the data, and state the sign of the slope from the scatterplot. Use the number sent as the independent variable.
b. Use linear regression to find the equation of the best-fit line. Graph the line with technology or by hand.
c. Interpret the slope.
d. Interpret the intercept.
A ski gondola carries skiers to the top of a mountain. It bears a plaque stating that the maximum capacity is 14 people or 2324 lb. That capacity will be exceeded if 14 people have weights with a mean greater than 2324 lb/14 = 166 lb. Assume that..
A software company wants to determine whether there is a relationship between their three sales offices and the sales of their software products. The actual sales results are
in the game of parcheesi each player rolls a pair of dice on each turn. in order to begin the game you must throw a 5
The number of times that Debbie proves me wrong each month follows a Poisson distribution with a mean of 2.5 times. What is the probability that "she who is never wrong" will fail to prove me wrong next month?
which of the following is not a requirement for regression analysis?a outliers can have a strong effect on the
Suppose fXng is a stationary Markov chain. Let Yn D X2n. Prove or disprove that fYng is a stationary Markov chain. How about fX3ng? fXkng for a general k?
Construct a 95% confidence interval estimate of the population mean amount in the bottles. Compare the results of (a) and (c). What conclusions do you reach?
The Bureau of Labor Statistics reported that the average annual income of dentists in the year 2005 was $110,000. A sample of 81 dentists, which was taken in 2006,
Identify potential geographic locations of these stages in this supply chain (this may be drawn on the graphical diagram or network diagram in Step 4). This should focus on the major locations for each stage of the supply chain. The lecture in Wee..
American sports fans often complain about the lack of scoring in soccer. In particular, many Americans feel that scoreless ties occur way too often. An avid fan of soccer is determined to set the record straight
explain why ms-within is not an appropriate error term demoninator for the repeated measures
Contracts. Your company bids for two contracts. You believe the probability you get contract #1 is 0.8. If you get contract #1, the probability you also get.
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