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Two towns both have a mean income for their residents of $30,000. The standard deviation of incomes of residents in town A is $2,600 and the standard deviation of incomes of residents in town B is $25,000. Explain what this says about the differences in the distribution of incomes in the two towns.
Survey was mailed to a total of 400 students; 100 were randomly selected from each of the freshman, sophomore, junior and senior classes last semester. What sampling method was used?
Suppose that 10% of all adults jog. An opinion poll asks an SRS of 400 adults if they jog. a) What is the sampling distribution of the proportion p^ in the sample who jog?
Find a 90% confidence interval for the population mean of annual growth (of those trees with an initial size of 2.41-2.60 centimeters).
A statistical study reported that a drug was effective with a p-value of .042. (a) Is this true? An effective sample may be found about 42 times in 1000 samples.
if a couple plans to have 10 children what is the probability that there will be a least one girl? if the couple
Comprise appropriate (BPS formatted) descriptive statistics table inferential statistics table.
the below two question must have a minimum 250 word count and use examples to support the solution. only use usa based
The hypotheses for this scenario are as follows: Null Hypothesis: μ ≤ 21.61, Alternative Hypothesis: μ > 21.61. You perform a one sample mean hypothesis test on a random sample of data and observe a p-value of 0.0095. What is the appropriate concl..
Estimate with 90% confidence the difference in the level of satisfaction with service between the two branches.
the diameter of the dot produced by a printer is normally distributed with a mean diameter of 0.002 inch. suppose that
What is the probability that he will answer all questions correctly?
The amount of pyroxidine (in grams) per multiple vitamin is normally distributed with a mean = 110 grams and a variance = 25 grams. A sample of 25 vitamins is to be selected.
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