6. A university administrator asserted that upperclassmen spend more time studying than underclassmen. Construct the 95% confidence interval for the difference in mean time spent studying for upperclassmen and lowerclassmen. Upperclassmen 35 15.6 2.9 Underclassmen 35 12.3 4.1

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6. A university administrator asserted that upperclassmen spend more time studying than
underclassmen. Construct the 95% confidence interval for the difference in mean time spent
studying for upperclassmen and lowerclassmen.
Upperclassmen 35 15.6 2.9
Underclassmen 35 12.3 4.1
Transcribed Image Text:E Ayalnesh Antokhin - Day 68 Diffe x docs.google.com/document/d/1P8K-jQT4AwuMFwVpFSsuVBig5j36v5ZanP-299UG6W/edit rks Netflix h Hulu Disney+ | * Lakewood C Infinite Campus JSTOR okhin - Day 68 Difference of Means Practice Insert Format Tools Add-ons Help Last edit was seconds ago 100% Normal text Calibri + BIU A 三, 三三 14 6. A university administrator asserted that upperclassmen spend more time studying than underclassmen. Construct the 95% confidence interval for the difference in mean time spent studying for upperclassmen and lowerclassmen. Upperclassmen 35 15.6 2.9 Underclassmen 35 12.3 4.1
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The confidence interval formula is x¯1-x¯2±t*s12n1+s22n2, where x¯1 and x¯2 are sample means, s1 and s2 are sample standard deviations, n1 and n2 are sample size for first and second sample, respectively. t* is the critical value which depends on the confidence level and degrees of freedom.

 

Lets upperclassmen sample is first and underclassmen sample is 2. So the given data is x¯1=15.6, x¯2=12.3, s1=2.9s2=4.1n1=35 and n2=35.

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