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The mean television viewing time for teens is 3 hours per day. Assume = 3 and population standard deviation is = 1.2 hours. Suppose a sample of 50 teens will be used to monitor television viewing time. Let denote the sample mean viewing time. What is the probability the sample mean will be within 0.25 hours of the population mean?
The following data are daily price quotations of two stocks: Stock A: 12.50, 12.75, 12.50, 13.00, 13.25, 13.00, 13.50, 14.25, 14.00. Is there a correlation between the two stocks? Explain.
Bags of tea are sampled to ensure proper weight. The overall average for samples is 8 ounces. Each sample contains 10 bags. The average range is 0.1 ounces.
Can you please derive the mean and variance of a RV X, which has a Poisson distribution.
Affirmative action commitments by industrial organizations have led to an increase in the number of women in executive positions. Satellite Office Systems has vacancies for two executives that it will fill from among four women and six men.
Employees of a local university have been classified according to gender and job type. The following table provides data about the employees.
Find the sample correlation between returns on assets and the ratio of loans to deposits. Interpret the intercept and slope of the estimated regression line.
Critically illustrate out the purpose of developing frequency distribution? Describe the relationship between the relative frequency and the cumulative frequency.
Use SPSS to make a scatterplot between stress and coping, and then add the fitted regression line to the plot. Mark both intercept and slope on the plot (You may consider to change the default X scale in SPSS)
What proportion of observed variation in hardness can be explained by the simple linear regression model relationship between hardness and elapsed time? (Give the answer to three decimal places.)
The mean score of a college entrance test is 500, the standard deviation is 75 and the scores are normally distributed.
Probability distribution described by the following density curve and The expected value of the sum of the weights of the two oranges, in pounds
What type of error has possibly been committed? Explain the error in ordinary language.
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