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You measure 32 textbooks' weights, and find they have a mean weight of 70 ounces. Assume the population standard deviation is 3.2 ounces. Based on this, construct a 95% confidence interval for the true population mean textbook weight. Use z = 2 (rather than 1.96) for your calculations.
Give your answers as decimals, to two places
Given below is the rate of return for one year (reported in percent) for the sample of 12 mutual funds. Using .05 significance level is it sensible to conclude that mean rate of return is more than 4.50 percent?
1) Calculate the mass defect of the fluorine nucleus 19 9F. The mass of neutral 19 9F is equal to 18.998403 atomic mass units.
question the probability that house sales will increase in the next 6 months is estimated to be 0.25. the probability
Test the null hypothesis that the proportion of airplane accidents due to pilot error is not 0.50. Use a significance level of 0.05.
What correlation coefficient is appropriate for this type of data?
Formulate a hypothesis that can be used to determine whether the mean annual consumption in webster city is higher than the national mean.
Is there any evidence to suggest the mean methane output per well per day has increased?- Find bounds on the p value associated with this hypothesis test.
No claim was made by the school. They took a sample with the above results and want to construct a two-sided 95% confidence interval for the population mean
You have also been given some information regarding average salary levels of managers after one year with the company, as well as the retention rates for first year managers for 10 office locations. Based on what you have been given, is there a co..
The number of shark attacks and deaths over a recent 5- year period is shown. Find the mean, median, mode, midrange, variance, and standard deviation for the date. Which data set is more valuable?
Prior experience has shown that the weight has a probability distribution with µ= 6 ounces and s = 2.5 ounces. What is the standard error of the mean?
one environmental group did a study of recycling habits in a california community. it found that 73 of the aluminum
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