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1. An investigator wondered whether a person's education is related to his or her satisfaction in life. Both of these variables can be measured using a quantitative scale.
2. To find out the effect of a drug on reaction time, an investigator administered 0, 25, 50, or 75 milligrams to four groups of volunteer rats. The quickness of their response to a tipping platform was measured in seconds.
for a normal curve with mean 15 and standard deviation 1.5 which of the following parts of the normal curve will have
Normal distribution with mean 1,200 hours, and standard deviation 70 hours. Determine the probability the mean life time of a random sample of 9 bulbs will be At least 1,180 hours.
Suppose the horses in a large stable have a mean weight of 1464 lbs, and a standard deviation of 111. What is the probability that the mean weight of the sample horses would differ from the population mean by less than 11 lbs if 34 horses are samp..
an engine oil supposed to have a mean viscosity of micro 85.0. a sample of n25 viscosity measurements resulted in a
For ease in calculating your statistics, you can either hand enter the data into Excel or use the Student Webfile file Judge from the Cengage website.
consider the following. enter your answers to four decimal places.a find the level of confidence assigned to an
Chemists have found that the oil can be extracted from the water /oil mix electrically. Researchers at the University of Bergen (Norway) conducted a series of experiments to study the factors that influence the voltage (y) required to separate the..
How do we use a least squares regression line? Please explain in your own words. What is the range for the coefficient of determination? Please explain in your own words.
1.an srs of 20 third grade children is selected in chicago and each is given a test to measure their reading ability.
the owner of the house of greens greenhouse wants to estimate the mean height that her seedlings grow. a sample of 11
the u.s. department of transportation reported that during november 83.4 of southwest airlines flights 75.1 of us
A furniture store claims that a specially ordered product will take, on average, mean= 35 days (5 weeks) to arrive. The standard deviation of these waiting times is 5 days.
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