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Suppose you wish to test the hypothesis that the students at university A are, on the average, younger than students at university B. A random sample of 80 students is drawn from university A and it is found that their mean age is 22.1 with a standard deviation of 2.6, while a random sample of 64 students from university B is found to have a mean of 23.5 with a standard deviation of 2.3. The samples do indicate that university A's students are younger than university B's; but is the difference significant at the 1% level?
Perform a test to determine whether there is sufficient evidence to support a claim of a linear correlation between two variables. Find the critical values of r given the number of pairs of data n and the significance level alpha.
A combination of content and supportive examples would be greatly appreciated.
A pair of dice is rolled. What is the probability of each of the following? (Round your answers to three decimal places.)
Based on a survey of over 10,000 households, the number of televisions in the home was recorded as given in the table below. Based on the data, find the expected number of televisions in a home.
Explain why it makes sense for a set of data to have a correlation coefficient of zero when the data show a very definite pattern.
Assume that the price of non-dividend paying stock is $32, its volatility is 30%, and the risk-free rate for all maturities is 5% per annum. Use derivagem to calculate the costs of setting up the following positions.
Use the Kolmogorov-Smirnov test to discover whether the distribution of location of accidents is uniformly distributed for the month of September
Construct a 95% confidence interval for the population mean, μ. assume the population has a normal distribution. In a random sample of 26 computers.
A machine cuts circular filters from large rolls of material. If 7.3% of the filters fail to meet specifications, use the normal approximation to the binomial to compute the probability
Choose an article that explains research using one or more statistical tests (z, t, ANOVA, chi square, regression) as part of data analysis. Explain the study using the following information:
Sketch a scatter plot that could represent data from each of following. Label the axes to indicate the independent and dependent variable.
A student scored 84 points on a test where the mean score was 79 and the standard deviation was 4. The student's z score was:
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