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A Geiger-Muller tube and a scaler record approximately 50 counts per second due to a radioactive source. What is the shortest counting time required so that the percentage error of the counts will not exceed 1%?
In a survey about soft drinks it was found that 5% of the respondents like diet soft drinks. 12% of them liked the brand Coke. Of all the Diet soda drinkers 40% liked Coke.
The mean return for a random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Build a 95 percent confidence interval for mu, population mean.
Constructing a 95% confidence interval for the true length of time for all pepper seeds to germinate you must calculate the margin of error. The margin of error in this case is 0.60.
Certo has complained that he was misrated on his January mission. Both ratings should be 10's, he claims to the chief, who agrees and recomputes the schedule. Do any changes occur over the schedule set in part (b)? What are the strengths and weakn..
At Kelsey High School, Mrs. O'brien noted that the students were waiting too long in line for their lunches. After collecting some data, Ms. O'brien determined the mean wait time was 10 minutes.
Describe the effect of an outlier or extreme value on the confidence interval - Find the probability that the return for common stocks
Test the hypothesis that the dogs did significantly better than what would be expected with random guessing.
Find the equation of least -squares line and plot the line on the scatter diagram of part (a)
A survey was conducted to measure the height of men. In the survey, respondents were grouped by age. In the 20-29 age group, the heights were normally distributed, with a mean of 67.8 inches and a standard deviation of 4.0 inches. A study particip..
The amount of money requested on a home loan application at federal savings follow the normal distribution, with a mean of $270,000 and a standard deviation of $35,000. A loan applicatiom is received this morning. What is the probability:
Calculate the expected value of this undertaking (make sure to take into account the thief's initial wealth).
A major problem resulting from the lack of randomization in a cohort study is: the possibility that a factor that led to the exposure, rather than the exposure itself, might have caused the disease.
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