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What is the test value? A sociologist wants to determine if the life expectancy of people in Africa is less than the life expectancy of people in Asia. The data obtained is shown in the table below. Africa:Sample mean 55.3,Population standard deviation 8.1, sample size 53Asia: Sample mean 65.3, Population standard deviation 9.3, sample size 42Calculate the critical value. Use a=0.05a) -2.33 b)-2.58 c)-1.96 d) -1.65
Is the normal distribution (or its special case, the standard normal distribution) effective in characterizing situations and/or in helping managers make decisions?
What assumption must you make about the population distribution in order to construct the confidence interval estimate in (a)?
What item/s can be deleted to improve reliability, what items should never be deleted to maintain reliability of data and how many items need to be deleted to achieve maximum reliability
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
It is found that among a random sample of 130 of the school's students, 32% of them plan to go into general practice. Find the P-value for a test of the school's claim.
A leasing firm claims that the mean number of miles driven annually,u , in its leased cars is less than 13500 miles. A random sample of 70 cars leased from this firm had a mean of 13207 annual miles driven.
The lengths of 225 fish caught in Lake Michigan had a mean of 15.0 inches. Assume that the population standard deviation is 2.5 inches.
Find the probability that he will answer all 10 questions correctly.
Determination of Nominal, Ordinal, Interval, Ratio.Temperature is an example of what level of measurement.
Suppose that an individual is randomly selected from the population, and define events by A = {type A selected}, B = {type B selected}, and C = {ethnic group 3 selected}. Calculate P(A), P(C), and P(A ∩ C). (Enter your answers to three decimal plac..
Determine if there is convincing evidence to support the claim that fewer than half of adult Americans can name at least one justice currently serving on the Supreme Court.
The following data are the lifetimes (in hours) of 20 certain electrical components: Find a point estimate and 90% confidence interval for the population lower quartile.
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