e) Construct a 95% Confidence Interval for the predicted mean 28-day strength of concrete whose 7-day strength is 3000 psi. Let x*=3000 f) Construct a 95% Prediction Interval for the predicted mean 28-day strength of concrete whose 7-day strength is 3000 psi. Let x*=3000

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3:50 PM Thu Apr 22
7 69%
< 88 Q
Stats
•..
Untitled Notebook (1)
Stats
regression line
e) Construct a 95% Confidence Interval for the predicted mean
28-day strength of concrete whose 7-day strength is 3000 psi.
Let x*=3000
f) Construct a 95% Prediction Interval for the predicted mean
28-day strength of concrete whose 7-day strength is 3000 psi.
Let x*=3000
75 of 87
Transcribed Image Text:3:50 PM Thu Apr 22 7 69% < 88 Q Stats •.. Untitled Notebook (1) Stats regression line e) Construct a 95% Confidence Interval for the predicted mean 28-day strength of concrete whose 7-day strength is 3000 psi. Let x*=3000 f) Construct a 95% Prediction Interval for the predicted mean 28-day strength of concrete whose 7-day strength is 3000 psi. Let x*=3000 75 of 87
3:51 PM Thu Apr 22
7 69%
く Q 囚
Stats
•..
Untitled Notebook (1)
Stats
e) Construc a 9,% Confidence Inte val for tr predicted mean
ace for a 75 year oie male. Let x*=75
f) Const ta 95% Prediction Inferval for he predicted as e for a
vear old .aio. Let x* -75.
2. As concrete cures it gains strength. The following data
represents the 7 day and 28 day strength (in pounds per square
inch) of a certain type of concrete.
7 Day Strength, x 28 Day Strength, y
2300
4070
3390
5220
2430
4640
2890
4620
3330
4850
2480
4120
3380
5020
2660
4890
2620
4190
3340
4630
a
b) Caicui.. v
c) Tast win.er there is a linear rolonship betwc
cr
streng d 20-day ength Let a
d) Construct a 95% Confidence Interval for the slope of the
Transcribed Image Text:3:51 PM Thu Apr 22 7 69% く Q 囚 Stats •.. Untitled Notebook (1) Stats e) Construc a 9,% Confidence Inte val for tr predicted mean ace for a 75 year oie male. Let x*=75 f) Const ta 95% Prediction Inferval for he predicted as e for a vear old .aio. Let x* -75. 2. As concrete cures it gains strength. The following data represents the 7 day and 28 day strength (in pounds per square inch) of a certain type of concrete. 7 Day Strength, x 28 Day Strength, y 2300 4070 3390 5220 2430 4640 2890 4620 3330 4850 2480 4120 3380 5020 2660 4890 2620 4190 3340 4630 a b) Caicui.. v c) Tast win.er there is a linear rolonship betwc cr streng d 20-day ength Let a d) Construct a 95% Confidence Interval for the slope of the
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