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A bank is comparing the quality of service given by its two most important branches. In branch A, 192 out of a random selection of 300 of its customers said that they were satisfied with the service. In branch B, 138 out of 250 randomly selected customers said that they were satisfied with the service.
At the 5% level of significance, can we infer that branch A has a significantly higher proportion of satisfied customers than branch B?
A state-wide sample survey is to be made. First, the state is subdivided into counties. Seven counties are selected at random and further sampling is concentrated on these seven counties.
You play a game with two possible outcomes. Outcome A has probability 0.4 and outcome B has probability 0.6. When B occurs you win $2.00; otherwise, you lose $1.00. What is your expected value for this game?
Testout the significance of the sample correlation also develop regression equation with scatter plot. Calculate chi-square is less than the critical value
What is the probability the Time/CNN poll will provide a sample proportion within plus-or-minus 0.02 of the population proportion?
Construct a 95% confidence interval on the population mean for the following sample data set:
Determine the probability that none of the calculators will be defective?
Consider a Poisson distribution with a mean of two occurrences per time period.
Black Hole Pizza Parlor instructs its cooks to put a "handful" of cheese on each large pizza. A random sample of six such handfuls were weighed.
Construct ogive cure and numerical measures for the discrete data.
The mean of a sample is 22.5. The mean of 1000 bootstrapped samples is 22.491. The bias of the bootstrap mean is
In exercise identify (a) sample and (b) population. Also, find whether sample is likely to be representative of population.
Using standard normal table, show critical value for left-tailed test with α = 0.02.
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