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Bob gets tests grades of 86, 92, and 60 He gets an 90 on his final exam. Find the weighted mean if each tests counts for 20%, and the final exam counts for 40% of the final grade.
Is there significant evidence that this production run doesn't meet specifications? Use a 1% level of significance.
He (given that) the true proportion of perfect condition items is only 80% what is the probability that the lot will not be shipped?
At.01 level of significance, is proportion of seeds which germinate dependent on seed type?
The number of items rejected daily by the manufacturer because of defects for last 30 days are:
If you had only one minute to estimate the standard deviation of a frequency distribution using only the information that can be obtained from a stem and leaf display, how would you do it and why?
Below are scores for 10 randomly selected students on each exam. 95% confidence interval for the mean scores on?
What is the probability that the next 100 customers will spend an average of less than $56 on dinner?
Suppose that weights of bags of potato chips coming from a factory follow a normal distribution with mean 12.8 ounces and standard deviation .6 ounces.
Estimating a linear regression equation to predict the future values of the dependent variable Y.
Test whether there is difference in the proportion of viewers using Chi square test.
A certain component is critical to the operation of medical device and must be replaced immediately upon failure. If the mean lifetime of this type of component is 100 hours and its standard deviation is 30 hours, how many of these components must..
To determine if this is evidence that students perform worse under uncomfortable conditions, The P-value of a test
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