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Question: In a study entitled How Undergraduate Students Use Credit Cards, it was reported that undergraduate students have a mean credit card balance of $3173 (Sallie Mae, April 2009). Assume that a current study is being conducted to determine if it can be concluded that the mean credit card for undergraduate students has increased compared to the April 2009 report. For a sample of 180 students with a sample mean of $3325 and a sample standard deviation of $1000, what is the p-value?
Explain the distribution using the following characteristics. Determine the shape of the distribution. what score best identifies the center (average) for the distribution.
What critical value should the company officials use to determine the rejection region?
When the machine is either out of control or down, a repair person must be called. What is the probability that a repair person must be called right now?
What is the Standard Deviation of the Probability Distribution that would list the number of students (from 0 to 84) and the probability of each.
Run fast Peter is a star runner on the track team. In the league championship meet, Peter records a time that would fall at the 80th percentile.
The faces are equally likely and the two rolls are independent. What is the average (mean) intelligence for such characters? How spread out are their intelligences, as measured by the standard deviation of the distribution?
let z be a random variable with a standard normal distribution and let x be a random variable with normal distribution
Write down the regression equation. State the R-squared value and the standard error and explain what they mean with respect to the data. Write down the value of the gradient of the regression line and explain what it means for this data
How large a sample should be selected in order to estimate the population proportion to within a margin of error of 0.02 with 97% confidence. The sample proportion from the preliminary sample was 0.18.
People in a large population average 60 inches tall. You take a random sample and will be given a dollar for each person in your sample who is over 65 inches tall.
An investigator wants to design a study to estimate the difference in the mean BMI between boys and girls age 12 living in new york city. How many boys and girls are needed to ensure 95% confidence interval estimate for the difference in mean BMI ..
A stationary Markov chain has the following transition matrix. Interest is a constant 5%. Find the APV of the following contracts based on this chain, both issued when the process is in state 0.
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