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Without an automated irrigation system, the height of plants two weeks after germination is normally distributed with a mean of 2.5 centimeters and a standard deviation of 0.5 centimeters.
a) What is the probability that a plant's height is greater than 2.25 centimeters?
b) What is the probability that a plant's height is between 2.0 and 3.0 centimeters?
c) What height is exceeded by 90% of the plants?
Which of the following scenarios would lead to the most accurate estimate of the amount of parking fees collected during the week?
Perform an appropriate hypothesis test, showing all critical steps. Do you support Bob's claim that citizens in his area spend more than $75 per year? Explain why or why not.
What is an example of data that can be transformed from one level of measurement to another, and another example of data that cannot be transformed?
Statisticians prefer large samples. Describe briefly the effect of increasing the size of a sample on each of the following: The margin of error of a 95% confidence interval?
For the new study, the estimate should be within 1% of the population proportion with a 90 percent confidence level. What is the necessary sample size?
Critique the HR manager's planned approach and give him advice on how to proceed. You can assume that a reasonable estimate for the proportion of new hires that are happy with the company is .8.
Compare the two forecasts computed in (a) and (b), using MAD. Which one should the dealer use for January of the next year?
If measurements are made over span of 9 months, and results are averaged, find out the probability that neighbourhood is considered unsafe?
How do you know if a value is a solution for an inequality? How is this different from determining if a value is a solution to an equation?
A random sample of 9 homes was selected in the neighborhood. What's an estimate of the average price of the houses in the sample?
A new cell phone battery is being considered as a replacement for the current one. Ten college student cell phone users are selected to try each battery in their usual mix of "talk" and "standby" and to record the number of hours until recharge wa..
One advantage of the repeated measures ANOVA is that it eliminates "individual differences" as a source of variability. Explain why there are no individual differences in the numerator and in the denominator of the F ratio.
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