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A telephone company wants to estimate the proportion of households that would purchase an additional telephone line if it were made available at a substantially reduced installation cost. A random sample of 700 households is selected and the results indicate that 198 of the households would purchase an additional line at the reduced installation cost. Find a 99% confidence interval for the proportion in the population that would purchase an additional line at reduced installation cost.
To find this, we must realize that we must use the sampling distribution of the mean to carry out the appropriate calculations. The sampling distribution of the mean will have a mean of $36, but a standard error of $8/√16 = $2
question the calculations for a factorial experiment involving four levels of factor a three levels of factor b and
1. Determine the relative frequency probability. 2.? Determine the expected frequency of the event.
From the shipment you take a random sample of 20. When sampling with replacement (binomial), determine the probability of obtaining: Exactly two defective components in the sample of 20.
What is the probability that Toyota will sell between 55,000 and 65,000 passenger cars during the next year?
According to a Gallup poll, 60% of American adults prefer saving over spending. Let X = the number of American adults out of a random sample
1) A random sample of 18 purchases showed the amounts in the table? (in $). The mean is ?$46.81 and the standard deviation is ?$24.47
The procedures +, *, and list take arbitrary numbers of arguments. One way to define such procedures is to use define with dotted-tail notation.
A study is run to estimate the incidence of atrial fibrillation (AF) in men and women over the age of 60. Development of atrial fibrillation was monitored over a 10 year follow-up period. The data are summarized below.
To evaluate the program, he selected a random sample of eight participants and found the number of days each was absent in the six.
Suppose systolic blood pressure, birth weight (oz), and age (days) are measured for 16 infants and the data are shown in the following table
someone is interested in studying property tax rates in the united states. he randomly selects 25 homes and looks up
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