• The following information was obtained from a CRD with 6 treatments and 5 replications per treatment INFORMATION: Exi. Σχ. Evaluate: Trt A 7.8 46.3 Trt B 7.4 44.95 Trt C 13.8 42.81 Trt D 12.2 44.77 Trt E 5.9 47.8 Trt F 14.2 44.97 Ho: MA MB MC = μD = μE = μF ---against--- HA: μA ‡ µB ‡ µc ‡ µD ‡ μE ‡ µF 1. What is the calculated F statistics? (round to the nearest hundredth; place your answer in the box below) 2. Evaluate the F calculated for the treatment effect, and indicate if you are going to reject or fail to reject the null hypothesis using an a = 0.05 (reject/fail to reject; place your answer right beside the calculated F statistics)

A population of N = 25 scores has ΣX = 40 and ΣX2= 120. For this population, what is the value of SS (sum of squared deviations)?

Hn. Don't provide handwriting solution

The National Institute of Standards and Technology (NIST) offers a wide variety of “standard reference materials” (SRMs) with accurately specified analyte concentrations. SRM 1951c is intended in part for “evaluating the accuracy of clinical procedures for the determination of total cholesterol . . . in human serum.” The certified total cholesterol is 6.244 ± 0.072 mmol/L. For the sake of this question, let’s treat 6.244 mmol/L as its “true” value (μ). We will use this standard to test a method with an intrinsic variability (for an experienced analyst) of σ = 0.131 mmol/L. 1. For what value of z does exactly 95% of the area under a Gaussian curve lie between ± z? Use this multiplier to find the range of measured cholesterol concentrations that would include 95% of the trials from the “parent population” (μ and σ) given above. 2. Calculate z for a trial in which the measured total cholesterol concentration is 6.302 mmol/L.  3. What is the probability that a trial will give a cholesterol…

A sample of patients is tested to determine if they have any hospital borne infections. How large of a sample must be collected to be accurate within 0.01 at the 1% level of significance, if the hospital estimates the true proportion of patients infected is 0.045? p̂ = q̂ = E = Z= n=

Compute the peast -squares regression line for predecting y from x given the following summary statistics: X= 8.1           s=1.2          y=100 sy= 15            r= 0.70

An engineer measures the peak current (in microamps) when a solution containing an amount of nickel (in parts per 10°) is added to a buffer. The experiment was repeated for eleven different values of nickel solutions. A scatterplot showing the data is given below: Peak Current in Eleven Buffers with Added Nickel Solutio 60 120 140 100 Amount of nickel (pp million) Suppose a regression line was added to the plot above. If an additional measurement had been taken with the nickel of 62 parts per 10 and a peak current of 0.38 microamps, adding this observation would: O A. increase the intercept, decrease the slope. OB. increase the intercept, increase the slope. C. decrease the intercept, increase the slope. OD. decrease the intercept, decrease the slope. E. not affect the regression line.