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Build a histogram and a percentage polygon
The following data represent the cost of electricity for the period of July 2008 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
Make a histogram and a percentage polygon.
Does the overall data support the mayor's claim?
At.01 significance level, can we conclude that 30-year mortgage rate for small banks is less than 6%? Evaluate the p-value.
The means appear to be very close, but not the variances. At α = .05, is there a difference in variances? Show all steps clearly, including an illustration of the decision rule.
An ANOVA procedure is used for data that was obtained from four sample groups each comprised of five observations. The degrees of freedom for the critical value of F are:
Make up a scatter diagram with 10 dots for each of the following situations:
One person's file is chosen at random. Find out probability that selected person will fall into following categories. Book keeping.
Suppose that a researcher does a study to see how level of anxiety (A 1 = low, A 2 = medium, A 3 = high) is used to predict exam performance (Y).
Find out optimal decision
CASE STUDY: Are the Fish Safe to Eat? Assessing which Factors affect Mercury Levels in Fish in Maine Lakes.
The alternative hypothesis is true. In this case the consumer advocacy group will have, A consumer advocacy group doubts this claim and tests the hypotheses
Use the t test to determine whether the slope of the regression model is significant at α = 0.05.
Determine the percent of the days is the price between $38.00 and $40.00?
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