Using the Chi-square Goodness of fit test and either Excel or Minitab, determine whether the proportion of accidents varies among the days of the week. Use a .01 level of significance and the following observed frequencies for accidents. Use the hypothesis testing procedure appropriate for this problem to help you make a decision. Day     Frequency Sunday   66 Monday     50 Tuesday     53 Wednesday     47 Thursday     55 Friday     69 Saturday     80

Suppose you are asked to toss a coin 16 times and calculate the proportion of the tosses that were heads. a.    What shape would you expect this histogram to be and why? b.    Where you do expect the histogram to be centered? c.    How much variability would you expect among these proportions? d.    Explain why a Normal model should not be used here.

Patients with two kinds of diagnoses were randomly assigned to one of three types of therapy and the effectiveness of the therapy was measure a 1-to-15 scale (with a higher number indicating greater effectiveness). There were two patients per cell. Use the data available below to comple parts (a) through (d) below. Click the icon to view the data table. Click here to view page 1 of the table of cutoff values for the F distribution. Click here to view page 2 of the table of cutoff values for the F distribution. Click here to view page 3 of the table of cutoff values for the F distribution. Click here to view page 4 of the table of cutoff values for the F distribution (a) Carry out the analysis of variance (use the 0.05 significance level). Complete the analysis of variance table for the data set below. SS MS F Source Columns Rows Interaction Within Total (Round to two decimal places as needed.) Data Table Diagnosis I Diagnosis II Therapy A 5 1 7 Print Therapy B 7 12 Done Therapy C 4282…

Weights​ (kg) of poplar trees were obtained from trees planted in a rich and moist region. The trees were given different treatments identified in the accompanying table. Use a 0.05 significance level to test the claim that the four treatment categories yield poplar trees with the same mean weight. Is there a treatment that appears to be most​ effective?   LOADING... Click the icon to view the data table of the poplar weights. No Treatment Fertilizer Irrigation Fertilizer and Irrigation   1.24 0.99 0.09 0.93   0.65 0.94 0.63 1.41   0.41 0.55 0.13 1.06   0.15 0.51 0.88 1.49   1.31 1.01 0.84         Determine the null and alternative hypotheses.   H0​: ▼   mu 1 greater than mu 2 greater than mu 3 greater than mu 4μ1>μ2>μ3>μ4 Exactly two of the population means are equal.Exactly two of the population means are equal. Not all of the population means are equal.Not all of the population means…