The following output models the factors that influence the price of a particular good. Calculate the standard error for the variable qual reg price quant qual Source Model Residual Total quant qual _cons SS O a. 5.622 O b. 0.019 OC 0.178 O d. 0.389 20582.878 22081.2331 42664.1111 df -.0586581 89.76477 2 price Coefficient Std. err. 53 55 775.711111 .0099625 MS 8.707455 10291.439 416.627039 Number of obs F(2, 53) Prob> F R-squared Adj R-squared Root MSE tP>|t| = -5.54 0.000 -.0752215 -0.33 0.744 -.4164046 10.31 0.000 72.29982 = 56 24.70 0.0000 0.4824 0.4629 20.411 [95% conf. interval] -.0352569 .2990884 187.2297
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- Define the following terms: A. Estimation B. Estimator C. Estimate And state the methods used in the Estimation of parameters in a point EstimateDefine the following twr5: A. Estimation B. Estimator C. Estimate And state the methods used in the Estimation of parameters in a point EstimateWhich of the following is a reason why fixed effect models can't estimate coefficients on variables that do not vary within unit? A, The errors will be homoscedastic. B, The de-meaned variables will not vary. C, We can estimate such a variable with fixed effects. D, Because no fixed effects exists in such a case.
- Dr. Castillejo feels that the maximum pulse rate during the run is a good predictor in explaining the oxygen consumption in the blood stream. He asserts that if the pulse rate at the end of the run increased, then the oxygen consumption will also increase, hence his/her heart is functioning well. Based on the R commanderoutput below, check if the data on oxygen consumption and maximum pulse rate (from 152 bpm to 196bpm) support Dr. Castillejo’s assertion.An industrial sewing machine uses ball bearings that are targeted to have a diameter of 0.75 inch. The lower and upper specification limits under which the ball bearings can operate are 0.73 inch and 0.77 inch, respectively. Past experience has indicated that the actual diameter of the ball bearings is approximately normally distributed, with a mean of 0.754 inch and a standard deviation of 0.005 inch. Type calculations and/or use Excel functions, including the explicit arguments for each function, in answering these questions. a) What proportion of the ball bearings produced meet the design requirements? b) Of 1000 bearings , how many are expected to be too large to function in the sewing machine? c) What diameter represents the 80th percentile of the bearings produced by this machine?the following data represent the operating time in hours fro 4 types of pocket calculators before a recharge is required. test at 0.01 level of significance if the operating times for all four calculators are equal. Find the following: MSbet: Mswit: Fratio: F0.01: Decision:
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