During a test, the scientist may try to prove or disprove just the null hypothesis or test both the null and the alternative hypothesis. If a hypothesis specifies a certain direction, it is called one-tailed hypothesis.
A mountain pass (also called a gap, saddle, or col) is a passage over a mountain range. They typically occur in valleys between mountain ridges, in low points along mountain watersheds or just the lowest point on a mountain ridge between two peaks. They can be relatively short in length (the width of a ridge) or they can be valleys many miles long. Mountain passes are often the location where roads and railways are built to get through the mountains. Many of them have become famous throughout history for their importance in trade and commerce.
The Balmhorn is a large peak located above LÃ¶tschenpass and Gemmipass in the western Bernese Alps. The peak supports a large glacier on its north side. The eastern and northeastern aspects are rock. To the southeast, it is connected to the Rinderhorn by long snow and rock ridge (Zackengrat). To the west, it is connected to Altels by an elegant narrow ridge. Jakob and Melchior Anderegg with Frank, Horace, and Lucy Walker made the first ascent of the Balmhorn via the Zackengrat on 21 July 1864.