# ML Crosssword #9

##### Across

**4.**calculated by dividing MSR (mean squared regression) by MSE (mean squared error), or explained variance by unexplained variance**7.**Having or having to do with a single variable**10.**a family of curves indexed by a parameter called the degrees of freedom, which can take the values 1, 2, …**11.**a measure of the joint variation between variables**13.**The difference between a datum and the value predicted for it by a model**14.**error occurs if the null hypothesis is not rejected when it is in fact false**15.**error occurs when the null hypothesis is rejected erroneously when it is in fact true**16.**A "dummy" treatment that has no pharmacological effect**17.**calculations that provide information about levels of variability within a regression model and form a basis**18.**tests of significance

##### Down

**1.**A time series where underlying generating process does not have a constant mean and/or a constant variance**2.**a sample where subsets of sampling units are selected separately from different strata, rather than from the frame as a whole**3.**the smallest significance level for which any of the tests would have rejected the null hypothesis**5.**A distribution that is not symmetrical**6.**What is true for the parts is not necessarily true for the whole**8.**Having exactly one mode**9.**indicates how much of the dependent variable’s total variation is accounted for by the predictor variable**12.**An hypothesis test based on approximating the probability histogram of the Z statistic under the null hypothesis by the normal curve