Mathematics, 20.04.2020 21:38, jstyopin
The O-rings in the booster rockets on the space shuttle are designed to expand when heated to seal different chambers of the rocket so that solid rocket fuel is not ignited prematurely. According to engineering specifications, the O-rings expand by some amount, say at least 5%, in order to ensure a safe launch. Hypothetical data on the amount of O-ring expansion and the atmospheric temperature in Fahrenheit at the time of several different launches are given in the file Dat9-11.xlsx.
a. Prepare a scatter plot of the data. Does there appear to be a linear relationship between these variables?
b. Obtain a simple linear regression model to estimate the amount of O-ring expansion as a function of atmospheric temperature. What is the estimated regression function?
c. Interpret the R2 statistic for the model you obtained.
d. Suppose that NASA officials are considering launching a space shuttle when the temperature is 29 degrees. What amount of O-ring expansion should they expect at this temperature according to your model?
e. On the basis of your analysis of these data, would you recommend that the shuttle be launched if the temperature is 29 degrees? Why or why not?
Answers: 1
Mathematics, 21.06.2019 14:30, igtguith
Brent works part-time at a clothing store. he earns an hourly wage of $15. if he needs to earn more than $45 in a day and works for x hours a day, which inequality represents this situation? a. 15x > 45 b. 15x < 60 c. x > 60 d. 15x < 45 e. x < 60
Answers: 1
Mathematics, 21.06.2019 16:00, dayanawhite64
Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.
Answers: 2
The O-rings in the booster rockets on the space shuttle are designed to expand when heated to seal d...
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