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The average life expectancy in the United States, L, has been rising steadily over the past few decades, as shown in the table below. Let t be the number of years since 1920, (so t = 0 represents the year 1920).
Year 1920 1930 1940 1950 1960 1970 1980 1990
Life expectancy 53.9 57.8 61.6 63.3 67 68.1 73.3 75.7
Find the equation of the regression line.
Average life expectancy, L(t)=
Assuming we can verify that the data set is approximately normally distributed, what percentage of times will the server be down less than 24 minutes?
What is the probability that: The amount requested is $80,000 or more?
Assuming that the variability is unchanged (i.e., σ = 6), is there sufficient evidence to suggest that the strength of the product has increased at the 1% level of significance?
No children that is equal to the value obtained by the census. Give the z statistic (rounded to two decimal places) and the P-value. What do you conclude?
From National Weather Service records, the annual snowfall in the TopKick Mountains has a mean of 92 inches and a standard deviation ? of 12 inches.
Sixteen juvenile rats were treated with the drug Naloxone (pairs 1,3,7,8) or, as a placebo control, Saline (pairs 2,4,5,6) and then observed for their play and non-play behavior in an open field for 1.5 minutes.
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Create a 90 percent confidence interval for the population proportion of all such firms with this as the primary motivation.
Determine the regression equation, letting the first variable be the independent (x) variable. Find the indicated predicted values.
Variance hour 100 and battery y: sample size 12,mean hour 1020,variance hour 121. can you conclude that two types of batteries are having the same mean life?
You are taking a multiple-choice quiz that consist of 7 questions. find the probability of guessing exactly four answers correctly.
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