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In their October 2003 issue, Consumer Reports evaluated the price and performance of 23 models of cordless phones. Computer output gives these summaries for the prices: Min Q1 Median Q3 Max Mean SD 15 30 50 110 200 71.75 52.08 ques- based on these results, which of the following is true ?
A - the distribution is skewed to the left
B - the distribution is symmetric
C- the standard deviation is larger than the range.
D- the distribution is skewed to the right.
E- the mean is a better measure of centre of these data than the median.
each of 12 ordered boxes contains 12 coins consisting of pennies and dimes. the number of dimes in each box is equal to
Consider the following hypothesis test What is the value of the test statistic? What is the p-value? With a=.05, what is your conclusion, reject or accept?
wasserman 1989 studied a process for the manufacturing of steel bolts. historically these bolts have a mean thickness
Using your workplace, present or prior, or an organization with which you are affiliated, identify a dependent variable and an independent variable of interest to you
1. for a standard normal model find the z-value that is less than the mean and for which 67 of the area under the
a) Let X be the number of teams from IU on Pete's season schedule. What's the probability that none of the Pete's opponents are from IU? What distribution and parameter(s) are you using?
When n = 250, determine the probability that proportion of couples in sample who are racially or ethnically mixed will be greater than 0.07?
Researchers have determined that patients who are smokers have 18% chance of contracting a serious illness. What is the probability that a given patient if the patient has a serious illness?
Forty percent of the readings are within 0.5 V of the true value. Estimate the standard deviation for the meter. What is the probability of an error of 0.75 V?
a population has u100 and sigma20. if you select a single score from this populaton on the average how close woud it be
a presidental candidate conducts a poll of likely voters in ohio to determine their mean ageanswer the following1.
a corporation has 11 manufacturing plants. of these 7 are domestic and 4 are located outside the united states. each
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