Which of the following was a cause of the ecological disaster known as the dust dawn
a. a massive earthquake that loosened the topsoil
b. a flood in california
c. the plowing under the native grasses that kept topsoil in place
d. excessive rainfalls that year

What is the county seat of ward county nd?

Why did general scott anaconda plan call for the capture of mississippi river

Let the sample size of leg strengths be 7 and the sample mean and sample standard deviation be 945 watts and 48 watts, respectively. (a) is there evidence that leg strength exceeds 900 watts at significance level 0.05? find the p-value.there is , evidence that the leg strength exceeds 900 watts at ? -0.05. 0.001 < p-value 0.005 0.05 p-value < 0.10 0.10 p-value < 0.25 o 0.010 p-value 0.025 (b) compute the power of the test if the true strength is 915 watts. (c) what sample size would be required to detect a true mean of 915 watts if the power of the test should be at least 0.9? n= exact number, no tolerance