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Q1) National Student Loan Survey gathers data to study questions related to amount of money that borrowers owe. Survey selected a sample of 1280 borrowers who began repayment on their loans between 4 and 6 months prior to survey. Mean debt for undergraduate study was $18,900 and standard deviation was about $49,000. Create a 95% confidence interval for true mean debt for student borrowers.
Following six students were questioned regarding (X) their attitudes toward legalization of prostitution and (Y) their attitudes toward legalization of marijuana.
a) Calculate and interpret Pearson's correlation coefficients for these data whether correlation is significant at alpha level .05 (using all your steps for hypothesis testing).
b) Calculate and interpret the constant (a) and slope (b) for these data and test whether this relationship is important at alpha level .05 (go through all of your steps of hypothesis testing). Standard error of b is .084.
x
y
A
1
2
B
6
5
C
4
3
D
E
F
7
A probability value of .25 means that an event will occur:
The mean maximum oxygen uptake for elite athletes has been found to be 80 with a standard deviation of 8.1. Assume that the distribution is approximately normal.
Binomial Distribution: Control Charts this problem will be referred to in the study of control charts. In the binomial probability distribution, let the number of trials be n = 3, and let the probability of success be p = 0.0228.
Twelve doctor's offices were given 3 lab inspections with the following results:
What is the probability of finding exactly four watch soap operas?
A study of cardiovascular risk factors compared heavy smokers, light smokers, and nonsmokers. Both men and women were included in the study and gender differences were also to be investigated. One of the variables measured was the heart rate after..
the maximum point total for the quarter was 200. The point totals for the 10 students are given in the stemplot below. For the density curve displayed below, which of the following is true?
It is known that 60 percent of all registered voters in the 42nd congressional District are Republicans. There registered voters are selected at random from the district. Compute the probability that exactly 2 of the 3 selected are Republicans, u..
Compute a 95% confidence interval for the mean using the formula and where is the mean of the ten random numbers.
Find the sample size for the 95% confidence interval used to estimate the population proportion.
At a large department store, the amount a shopper spent and the shopper's gender (male or female) were recorded. To determine if gender is useful in explaining the amount of money a shopper spends at the store we could
What is the probability that they all hit the target?
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