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Question: Let Xi be the last digit of D2i where Di is a random digit between 0 and 9. For instance, if Di = 7 then D2i = 49 and Xi = 9, Let Xn = (X1 + .. Xn)/n be the average of a large number n of such last digits, obtained from independent random digits D1, . .. Dn.
a) Predict the value of Xn for large n.
b) Find a number ? such that for n = 10,000 the chance that your predication is off by more than ? is about 1 in 200.
c) Find approximately the least value of n such that your prediction of Xn is correct to within 0.01 with probability at least 0.99.
d) Which can be predicted more accurately for large n: the value of Xn, or the value of Dn = (D1 + . .. +Dn)/n?
e) If you just had to predict the first digit of X100, what digit should you choose to maximize your chance of being correct, and what is that chance?
Chips Ahoy. In 1998, as an advertising campaign, the Nabisco Company announced a 1000 Chips Challenge, claiming that every 18-ounce bag of their Chips Ahoy.
Use your fitted line to guess a simple relationship between x and y. (In many applicationsto science and social science, data is transformed before regression is employed. The most commonly used transformations are power transformations and logari..
Determine the critical regions for test in terms of the sample mean, what is the probability of a type II error for this test if the true mean is in fact 195 mg and what impact would reducing the sample size have on the type I and type II errors?
Seeds that germinated within 5 weeks after planting was recorded for each seed type. At the .01 level of significance, is the proportion of seeds that germinate dependent on the seed type?
In a distribution that follows the normal curve. How likely is it that an observation is greater than two standard deviations from the mean?
Presumably, the headline refers to all registered voters in the state, not just those in the samples. Considering the margin of error accompanying each poll, do you agree with the headline? Explain.
A student randomly surveyed n = 36 other students and found that the mean amount of money spent on texts was x‾ = $121.60. If the standard deviation of the population was σ = $6.36, find the 90% confidence interval of the mean.
Calculate the standard deviation of the data. For this calculation compute the difference between each one of the observations and the mean.
Translate the following into standard-form categorical propositions.- Bromine is extractable from seawater.
you are picking a bouquet of 20 flowers for your mother at random from a garden with 25 coneflowers 35 daisies and 42
A stationary random process, X(t), has a mean of μX and correlation function, - - Find the correlation function.
The purpose of this example is not to negate the serious and unexpected outcomes related to heart disease, which hormones were thought to protect against.
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