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Question Take me out to the ball game. What is the relationship between the price charged for a hot dog and the price charged for a 16-ounce soda in Major League Baseball stadiums? Table gives some data. Make a scatterplot appropriate for showing how soda price helps explain hot dog price. Describe the relationship that you see. Are there any outliers?
An airline tracks data on its flight arrivals. Over the past six months, 65 flights on one route arrived early, 273 arrived on time, 218 were late, and 44 were cancelled.
The mean speed is 67 mph, and the standard deviation is 6 mph. What is the proportion of vehicle speeds at this location that are faster than 75 mph?
on one busy holiday weekend a national airline has many requests for a standby flights at half of the usual one way
Find (i) the percentage of batteries with a life time of at least 470 hours (ii) the proportion of batteries with life time between 385 and 415 hours. (iii) the minimum life of the best 5% of batteries.
Does the value 97.2% suggest that this is a good model? Explain.- Here's a scatterplot of the residuals. Now do you think this is a good model for these data? Explain?
Researchers want to conduct a survey of students taking introductory statistics in the state. Explain a method for collecting each of the given types of samples:
To test whether there is any association between two variables using Chi-Square test for independence.
as part of a studyinvestigators wanted to assess the accuracy of self reported smoking status. participants are asked
prestressed wire wrapping concrete pipe is manufactured in large rolls. a quality-control inspection requires 5
Calculate sample proportion and then also calculate a 99% confidence interval for true population proportion, p.
A store owner knows that any customer walking into his store has a 35% chance of buying something. What is the probability that 3 of the next 6 customers make a purchase
construct a 99 confidence interval estimate of the mean of the differences between volumes for the first born and the
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