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Weakly earnings on a certain import venture are approximately normally distributed with a known mean of 219 and unknown standard deviation. If the proportion of earnings over 291 is 0.155, find the standard deviation.
Find a 90% confidence interval for the population average µ of the percentage of hospitals providing at least some charity care.
a state lottery has1100 prizes of 1145 prizes of 1025 prizes of 655 prizes of 2902 prizes of 1290amp 1 prize of
mike took clothes to the cleaners three times last month. first he brought 2 shirts and 1 pair of slacks and paid 7.47.
What proportion of 330 cci cars fall between 26 to 30 miles per gallon range? Compute the percentage of each of the car models that get 30 or more mpg.
Administrative staff based at a business school in the UK are advised to take a 15 minute break from their personal computer after working on it for 90 minutes continuously. A random sample of 36 staff revealed that, one average a break was taken aft..
A study of family income is studied through a sample of 500 randomly selected families. The results can be summarized as the mean family income was 41,000 the median income was 29,000.
Comprise appropriate (BPS formatted) descriptive statistics table inferential statistics table.
The point of averages of a scatterplot of Y against X is (14, 1 ). The SD of X is 6, and the SD of Y is 7.
what is a x2 test and what type of data would we use with it to test a hypothesis? what is an example of a variable for
They find that these 100 people lost an average of 38 hours with a standard deviation of 9.5 hours. What is the P-value for this significance test?
any conclusion drawn for the t-test statistical process is only as good as the research question asked and the null
Using the 0.05 level of significance, is there evidence that the population mean is above $190? What is your answer in (a) if s = $50 and the 0.10 level of significance is used?
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