You just learned that the 102 whip is not the perfect antenna (SWR wise) as many people claim.
Yes the impedance should measure around 37 ohms since it is 1/2 of 1/4 wave dipole antenna. While this isn't too critical, it does represent a feed point current loss but that's the trade off as opposed to using a mobile antenna with a loading coil.
You probably are aware shortened mobile antennas have loading coils. This coil is needed to match the antenna feed-point if properly designed to 50 ohms or close to it since the antenna is shorter than a 1/4 wave length and the impedance is increased.
However, even though loaded antennas may have a 50 ohm feed-point, the trade off here is losses within the coil itself so the effective radiated power (efficiency) is decreased by as much as 20% or more on 11 meters and reduce even at higher percentage losses at lower frequency amateur bands. This is the price you pay for running mobile antennas especially at lower frequencies, but it does let you work the bands at least. With the 102 whip, you don't have any coil losses so the efficiency is much improved over loaded coil antennas.
If you insists on perfection for your 102 whip, get some 12 gauge enameled wire like the type used for electrical motor winding's and wind 7 turns around a spark-plug's thread with an inch or so left over on each end and scrape the enamel off both ends to solder on 2 terminal rings, then attach 1 ring to your antenna feed point on the "Hot" side and the other to the ground side of the antenna, usually the mounting bracket bolt. This creates a shunt matching coil.
Now use your analyzer and check impedance. You probably will have to gently stretch the coil some or compress it until you get a 50 ohm reading. Take note on the impedance change with every adjustment so you know which way to go. You may have to add or subtract a coil turn to get that elusive 50 ohm match. Most likely you will get a near perfect match on a 102 whip around 27.700 MHz. Add a spring if you want it closer to the CB bands but the bandwidth is very wide on 102 whips so that it isn't really necessary unless you are hung up on SWR.
Below is a pic of an HF mobile antenna from underneath the trunk with a loading coil. Note this one appears to have a coil tap to use for different bands since impedance vary especially on lower bands. Notice one coil leg on the hot side coax and the other is grounded.
