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Sections include: experiments and generalised causal inference; statistical conclusion validity and internal validity; construct validity and external validity; quasi-experimental designs that either lack a control group or lack pretest observations on the outcome; quasi-experimental designs that use both control groups and pretests; quasi-experiments: interrupted time-series designs; regresssion discontinuity designs; randomised experiments: rationale, designs, and conditions conducive to doing them; practical problems 1: ethics, participation recruitment and random assignment; practical problems 2: treatment implementation and attrition; generalised causal inference: a grounded theory; generalised causal inference: methods for single studies; generalised causal inference: methods for multiple studies; a critical assessment of our assumptions.
Surprised by an early and devastating winter, 145 of 376 Mormon handcart pioneers perished. A rescue of the survivors took place from a stone refuge near Devil's Gate, Wyoming. Jones accompanied the Mexican War volunteers who marched from St. Louis in 1847, and went to Utah in 1850, where he played an active part in Mormon affairs. He spent many further years as a guide, hunter, Indian fighter, and explorer.