Population proportion of mice
In sample of 55 mice, a biologist found that 42% were capable to run a maze in 30 seconds or less. Determine the 90% limit for the population proportion of mice that can run a maze in 30 seconds or less.
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A study of elephants is conducted to find out the average weight of certain subspecies of elephants. The standard deviation for population is 500 pounds. At an 80% level, how many elephants need to be weighed so average weight will be accurate to
The balloon is placed in liquid nitrogen until its temperature reaches -142 degrees Celsius. A balloon is filled with N_2_ gas to a volume of 1.92 L at 37degrees Celsius. Assuming the pressure remains constant; estimate the volume of the cooled ba
An experiment was conducted to find out the strength of a certain kind of braided cord after weathering. The strengths of 56 pieces of cord which had been weathered for 30 days were investigated. The 56 pieces of cord were placed concurrently in a
Calculate whether the molecule is polar, find out the hybridization of all interior atoms, and make a sketch of the molecule, according to valence bond theory, showing orbital overlap.
In dry cleaning a liquid compound used which contains the 85.5% Cl and 14.5% C by mass and has a molecular weight of the 166 amu. Write down the Lewis formula for the molecule and tell the molecular geometry.
A report states that 46% of home owners have vegetable garden. How large a sample is required to determine the true proportion of home owners who have vegetable gardens to in 4 percentage points with 92% confidence?
Find out the 95% confidence interval for variance of the heights of maple trees if sample of 26 trees has standard deviation of 10.2 feet.
Employ the given degree of confidence and sample data to develop a confidence interval for the population proportion p.
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