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Create a cumulative percentage distribution and a cumulative percentage polygon.
The following data represent the cost of electricity throughout July 2006 for a random sample of 50 one-bedroom apartments in a large city:
Raw Data on Utility Charges ($)
96
171
232
178
147
102
153
197
127
82
157
185
90
116
172
111
148
213
130
165
141
149
206
175
123
128
144
168
109
167
95
163
150
154
143
187
166
139
108
119
183
151
114
135
191
137
129
158
Form the cumulative percentage distribution and plan a cumulative percentage polygon.
A scientist examined the effect of temperature and catalyst on the yield of a reaction. He ran the experiment at both 150° and 200°C with two types of catalyst.
You have been given a report that presents two regression models with different numbers of independent variables. You do not have the data so you cannot re computed regression models. Nevertheless, you have been asked to find out which model is b..
Construct a 95 percent confidence interval for the true mean.
For each lettered part, a through c, examine the two given sets of numbers. Without doing any calculations, decide which set has the larger standard deviation and explain why. Then check by finding the standard deviation by hand .
Solution utilizing graphical method. Compute the following linear programming problem. Among which of the following points (X, Y) is not a feasible corner point.
Solve different inventory control problems using an appropriate OR method.
The article claims that the distributions of annual returns for both common stocks and long-term government bonds are bell-shaped and approximately symmetric. Assume that these distributions are distributed as normal random variables with the mea..
Below are one hundred pseudorandom numbers from a uniform pdf. Set up and test the appropriate goodness-of-fit hypothesis. Let α = 0.05.
The hypothesis is to be tested at the 5% level of significance. The critical value from the table equals:
What sample size and acceptable level would result in a probability of .05 that a good batch will be rejected and a probability of .10 that a bad batch will be accepted?
Organize data into a frequency distribution. How many classes would you propose? What value would you propose for class interval?
At the .01 level of signiicance, is the true mean greater than 10?
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