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A large construction company wants to know the mean time required to complete a house's basement. How many houses must be randomly selected to be 95% confident of knowing the mean time required to complete a basement to within 1.5 hours? In a small sample done previously, the time to complete the basement has a standard deviation of 14.3 hours.
Steam explosion of peat. The steam explosion of peat yields fermentable carbohydrates that have a number of potentially important industrial uses.
a researcher is interested in estimating the average salary of police officers in a large city. she wants to be 99
Generate a 95% CI for the difference in proprotions of particpants reportinga reduction of symptoms between the experimental and placebo groups.
Refer to the previous problem and suppose that both m and s 2 are unknown. Then a con?dence interval for m with approximate con?dence coef- ?cient 1 - a is given be relation (20).
For each percent quoted, give the margin of error. You should express these in percents, as given in the quotation.- Rewrite the paragraph more concisely and include the margins of error.
What are the mean and standard deviation for the total bicycle setup time? A customer decides to buy a bike like one of the display models but wants a different color. The shop has one, still in the box. The manager says that they can have it read..
As i study on childhood disease then my collected sample is 269 and variable include age of child. vaccination status , social condition include type of house ,monthly in come .no of rooms in house ,person living in house , type of waste disposal and..
a study of fast-food nutrition compared the caloric content of french fries. thirty-eight randomly selected servings of
Click it or else From police records, it has been determined that 15% of drivers stopped for routine license checks are not wearing seat belts.
Pedro wants to know if the weight loss of his group on the chocolate-only diet is representative of weight loss in a large population of middle aged men.
According to the norms established for a reading comprehension test, eighth graders should average 84.3 with a standard deviation of 8.6. If 45 randomly selected eighth graders from a certain school district averaged 87.8, use the four steps in th..
a machine that cuts corks for wine bottles operates in such a way that the distribution of the diameter of the corks
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