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The weekly mean income of a group of executives is $1000 and the standard deviation of this group is $100. The distribution is normal. What percent of the executives have an income between $1000 and $1100?
Converting data to indexes makes it easier to compare the trend in a series composed of exceptionally large numbers.
lays inc. packages potato chips in small bags. the mean number of chips in a bag is 20 with a standard deviation of 3.
1 due to normality the formula for computing z is the same for a single data value as it is for an average of the data
the go transportation system of buses and commuter trains operates on the honor system. train travelers are expected to
At a 5% level of significance, is there sufficient evidence that the population mean waiting time is now less than 3.7 minutes?
The table on page 124 indicates XRAY was the only variable input into the equation and the model’s overall percentage correct was 75.47%. On page 125, STAGE was entered into the equation, but it looks like the model still correctly classified 75.47%...
The assembly time for a product is uniformly distributed between 6 to 10 minutes.
estimating confidence interval for mean value of y dependent variable.consider the simple linear regression of y
given the amount of vitamin c in a medium orange is normally distributed with a mean of 70mg and a standard deviation
In a distribution of sentence lengths in months like the following: 6, 12, 10, 18, 24, 360; which statistic would a researcher not want to report?
Measures the discrepancy b/w the data and the null hypothesis. We can make large values of T are evidence against H0 in most cases. Explain why?
The standard deviation is estimated to be 0.279. Use the 99% level of confidence.
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