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Rhe frequency distribution summarizes a sample of times (in minutes) between eruptions of a cretain geyser. Find the approximate population mean and approximate population standard deviation of the data.
Time Frequency
40-49 8
50-59 43
60-69 25
70-79 7
80-89 104
90-99 12
100-109 1
You are presented a 90% confidence interval for the difference in population mean scores (with drug - without drug) of (-17.81, -7.24). What can you conclude from this interval?
If a garage is robbed, what is the probability the doors were left open?
Under proposed plan, how long, on average, will patient stay in ER? On average, how long will Potential Admit stay in ER?
What is the probability that all tree students pick a different card?
At.05 level of significance, is there evidence to propose that mean life length of the batteries manufactured by this manufacturer is more than 400 hours?
Find a 95% confidence interval for the proportion p of the inner-city, working-class group who eventually became alcoholics.
Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
What is the probability that the average IQ, from a random sample of 64 individuals, is greater than 102?
Chi-square test for independent of attributes - A random sample of students is interviewed to determine if there is an association between class and attitude toward corporations?
Compare 2 moving averages using MSE and compute Exponential smoothing. The subsiquent data which represents demand for company ABC's products for the last 10 months.
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
Illustrate what can we say about the probability distribution. Is it approximately normal, elucidate the mean and standard deviation.
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