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Consider the data that was obtained from a random sample of 45 credit card accounts. Identify all the averages (mean, median, or mode) that can be used to summarize the outstanding balance on each account.
Why is estimating a multiple regression model just as easy as bivariate regression?
Find a 95% confidence interval for the true proportion of patients who experienced cotton mouth. Show your calculations and/or explain the process used to obtain the interval.
Using binomial distribution find the probability that 2 or 3 women in a sample of 20 will never be married.
If 4.01% of these DVD players have a life span of more than 8 years, what is the standard deviation of the DVD player's life span?
The director of a state agency believes that the average starting salary for clerical employees in the state is less than $30,000 per year. To test her hypothesis
A random sample of eight adults aged 30 years were asked how much they spent on medical costs in the year 2011. The following data were measured.
Assume that two samples are independent simple random samples selected from normally distributed populations. Use a 0.05 significance level to test the claim that male and female biology students speak the same mean number of words in a day.
Before starting the trial, a pilot study is conducted involving 7 participants. Is there a statistically significant difference in blood pressures overtime? Run the test at a 5% level of significance.
Determine whether descriptive or inferential statistics have been used in the statement below:
Suppose that 30% of all adults in Ohio support the increase. The probability that at least 800 people support the increase is?
In a survey about soft drinks it was found that 5% of the respondents like diet soft drinks. 12% of them liked the brand Coke. Of all the Diet soda drinkers 40% liked Coke.
Conduct an analysis of variance
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