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Suppose the height of Canadian females has μ = 180 and σ = 10. This variable is normal. What is the expected proportion in this population with a height between 185 cm and 187 cm? Please round answer to two decimals (e.g., 0.752 becomes 0.75).
A computer repair service found that a random sample of 45 repair costs had a mean cost of $659. Assume that the population standard deviation is $125. Calculate the margin of error, E, for a 95% confidence interval for the population mean µ.
Encountered because the data were not obtained from a randomized experiment? If not, can you imagine one?
What's the probability that in a city of 10,000 there are more than 200 people with this condition? Be sure to verify that a Normal model can be used here.
Why do the critical values from the Chi-square distribution get larger as the degrees of freedom get larger? Recall that this is opposite the pattern for the t-table.
Suppose a certain type of pesticide is actually not toxic to humans, but a study erroneously concludes that it is toxic, and the pesticide is banned.
1.reading highway signs is not always easy especially if your vision is imperfect. vision in general tends to
A random variable x is defined to be the defined to be the the difference between the higher value and the lower value when two dice are thrown. if they have the same value x is defined to be zero find the probability distribution of x
question university h has decided to accommodate more students this fall. knowing that typically 40 if the students
A sample of 25 cities have been classified as high or low on their homicide rates and on the number of handguns sold within the metropolitan area.
Given the scores 2, 4, 4, 7, 8: (a) Calculate sX by the raw-score formula. (b) Calculate t required to test H0: X 8.0 versus HA: X 8.0.
What is the expected value of the game to the? player? If you played the game 1000? times, how much would you expect to? lose?
Imagine you are trying to convince a dubious experimentalist of the merits of quasiexperimental research. What arguments would you use to convince him or her of its value?
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