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1. Construct a frequency distribution table to organize the following set of data:
109 114 111 109 109 106 110 114 114 112 111 110 114 114 110 113 114 105 107 107.
2. Construct a grouped frequency distribution for the following 28 scores using a class width of 4:
84 82 87 74 77 72 85 72 80 82 66 69 67 65 80 75 70 69 67 78 65 88 72 84 65 75 79 71.
3. Provide a different example for each of the following types of variables from your work or home life:
A) A continuous variable B) An ordinal level of measurement.
In 2004, Newsmonth reported that 60% of young children have blood lead levels that could impair their neurological development. Assuming that a class in a school is a random sample from the population of all children at risk
a large disaster cleaning company estimates that 30 of the jobs it bids on are finished within the bid time. looking at
Is it reasonable for the manufacturer to claim that the drill bits will last 2.5 hours?
assume that the following data are from a random sample of the body temperatures of 55 healthy adults.use excel or your
Smaller clearance (i.e., x1 - x2) than 0.09 should be 0.006, what distance between the nominal dimensions of the two parts (i.e., u1 and u2) should be specified by the designer?
Is there a significant difference in sales dollars of hats between the west side and east side stores at the 5 percent level of significance? (a) State the hypotheses. (b) State the decision rule and sketch it. (c) Find the test statistic and stat..
A researcher demonstrated a correlation of r = 0.60 between teacher attire and student academic performance across 150 grade schools in her state.
Demand for pools. Tropical pools sells an aboveground model for p dollars each. The monthly revenue from the sale of this model is given by..R= -0.08p^2 + 300p
Markland Manufacturing intends to increase capacity by overcoming a bottleneck operation by adding new equipment. Two vendors have presented proposals.
Fit both linear and an exponential trend to the data. (d) Which model is preferred? Why? (e) Make a forecast for 2003, using a trend model of your choice (or judgments forecast).
using the experimental method had a mean of 29 minutes with a variance of 16 minutes. Use α = .10 for all tests.For a right-tail test of means (assume equal variances) the critical value is?
At significance levels of .05 and .01 test H 0 : the factors A and B are independent.
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