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To find the sample size based on the normal distribution.
A processor of carrots cuts green top off each carrot, washes the carrots, and inserts six to a package. Twenty packages are inserted in a box for shipment. To test weight of the boxes, a few were checked. The mean weight was 20.40 pounds, the standard deviation 0.5 pounds. How many boxes must the processor sample to be 95.0 percent confident that sample mean does not differ from the population mean by more than 0.20 pounds?
It is known that 60 percent of all registered voters in the 42nd congressional District are Republicans. There registered voters are selected at random from the district. Compute the probability that exactly 2 of the 3 selected are Republicans, u..
When would you use hypothesis testing and when would you use confidence intervals?
The following table shows the hardness (in Brinell hardness numbers) and the tensile strength (in thousands of pounds per square inch) of ten specimens of a certain alloy.
A researcher wishes to forcast the proportion of fish in a perticular lake which is inedible due to pollution of the lake.
Organize data into a frequency distribution. How many classes would you propose? What value would you propose for class interval?
Is there evidence that population mean amount is different form 8.17 ounces? (Use a 0.05 level of significance.) with sample standard deviation of 0.051 ounce.
Comprise appropriate (BPS formatted) descriptive statistics table inferential statistics table.
It is better to use the median rather than the mean for a distribution when:
Compute mean and standard deviation for sample of N = 8 females and sample of N = 8 for males.
Using the probabilities above what is the expected size of family you draw?
What is the OR of getting cancer fora late child birth woman compared to an early first birth woman?
Depends on the satellite information illustrate what is the expected number µ of real forest fires on the Seward Peninsula.
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