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1 for the data in problem 25 why would you suspect that the standard error of the sample mean will be larger than the
under normality the sample mean has a smaller standard error than the 20 trimmed mean or median if observations are
if the sample mean and 20 trimmed mean are nearly identical it might be thought that for future studies it will make
a manufacturer claims that their light bulbs have an average life span that follows a normal distribution with mu 1200
1 for a binomial with n 7 and p 35 what is the probability of exactly 2 successes2 for a binomial with n 18 and p 6
coleman 1964 interviewed 3398 schoolboys and asked them about their self-perceived membership in the leading crowd
for the following probabilitiesageincomehighmediumlowlt3003018009030-50052312156gt50018108054determine a the
given table shows the exam scores for 27 students create a stem-and-leaf display using the digit in the ones position
1 if the leaf is the hundredths digit what is the stem for the number 346792 consider the values 5134 5532 5869 5809
1 describe a situation where the sample histogram is likely to give a good indication of the population histogram based
1 when trying to detect outliers discuss the relative merits of using a histogram versus a boxplot2 a sample histogram
in given problem what is the probability of observing a value greater than or equal to 3problemif the possible values
for the probability functionx01px73verify that the mean and variance are 3 and 21 respectively what is the probability
imagine that an auto manufacturer wants to evaluate how potential customers will rate handling for a new car being
1 if the possible values for x are 1 2 3 4 5 with probabilities 2 1 1 5 1 respectively what are the population mean
in given problem determine the probability of getting a value within one standard deviation of the mean that is
in given problem suppose the possible values for x are now 0 2 4 with the same probabilities as before will the
for the probability functionx12345px1523215determine the mean the variance and the probability that the a value is less
for the probability function normal 0 false false false en-us x-none x-none
1 argue that the smallest observed value x1 as well as the the lower and upper quartiles satisfy the definition of a
1 the height of 10 plants is measured in inches and found to be 12 6 15 3 12 6 21 15 18 and 12 verify that normal 0
1 use the rules of summation notation to show that it is always the case thatsigmaxi - x 02 seven different
a weightlifters maximum bench press in pounds in each of six successive weeks was 280 295 275 305 300 290 find the
1 apply the boxplot rule for outliers to the values in the preceding problem2 consider the
1 verify that for the data in the previous problem the boxplot rule declares the values 20 240 and 250 outliers2 what