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The peak is a doublet, area 6, indicating that it corresponds to two identical CH3 groups which are adjacent to a CH (they is split into n+1 peaks, where n is the number of adjacent, equivalent protons). The chemical shift (d 1.6) suggests that the CH3 groups are in a simple (alkane-like) environment.
The peak is a septet (seven peaks), area 1, indicating that it corresponds to a CH which is adjacent to six equivalent hydrogens (i.e., (CH3)2); it is split into n+1 peaks, where n is the number of adjacent, equivalent protons). The chemical shift (d 2.7) suggests that the CH is adjacent to an electronegative group (i.e., a phenyl ring).
The peak is a singlet, area 3, indicating that it corresponds to a CH3 which is not adjacent to any hydrogens (an "isolated" methyl group). The chemical shift (d 3.6) is in the region often seen for groups adjacent to electronegative atoms (i.e., an oxygen).
There are two doublets in this region, representing four hydrogens. The chemical shift is in the "aromatic region", suggesting that the molecule contains a 1,4-disubstituted benzene ring, and that the substituents on the ring are not identical.
C10H14O
From the molecular formula, the compound has "4 degrees of unsaturation" (four double bonds or rings), suggesting the presence of an aromatic compound (benzene has four degrees of unsaturation).
The proton NMR has four sets of peaks; a singlet at d 3.6 (3H), two sets of doublets centered around d 6.9 (4H), a septet at d 2.7 (1H) and a doublet at d 1.6. The singlet at d 3.6 is consistent with an isolated CH3 adjacent to an electronegative center, such as an oxygen. The septet and doublet strongly suggest an isopropyl group
IUPAC Name: 4-isopropyl-1-methoxybenzene (4(1-methylethyl)-1-methoxybenzene)
CH(CH3) 2 in which the carbon is bonded to something mildly electronegative and the two doublets centered at d 6.9 strongly suggest a 1,4-disubstituted aromatic compound.
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Structure: 