Homework Answers
The values when arranged in ascending order are:
330, 562, 614, 656, 676, 693, 704, 708, 711, 716, 737, 752, 764, 770, 783, 791, 794, 795, 810, 835
(a) Mean = 710.05
(b) For 10% trimmed the top and bottom 2 values are removed to calculate the mean.
The 10% trimmed mean = 729
(c) For 20% trimmed mean the top and bottom 4 values are removed to calculate the mean
The 20% trimmed mean = 733.75
The distribution of data may be Skewed to the left because the mean appears to increase slightly as values are trimmed.
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(Type integers or decimals rounded to one decimal place
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Find the medians.
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The frequency distribution was obtained using a class width of 0.5 for data on cigarette tax rates. Use the frequency distribution to approximate the population mean and population standard deviation. Compare these results to the actual mean y = $1.545 and standard deviation o = $0.941 Click the icon to view the frequency distribution for the tax rates The population mean is $ (Round to three decimal places as needed.) The population standard deviation is s (Round to three decimal...
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2. Compute the Z scores for the last three values.
3.
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Find the means.
The mean for systolic is__ mm Hg and the mean for diastolic
is__ mm Hg.
(Type integers or decimals rounded to one decimal place
asneeded.)
Find the medians.
The median for systolic is___ mm Hg and the median for
diastolic is___mm Hg.
(Type integers or decimals rounded to one decimal place
asneeded.)
Compare the results. Choose the correct answer
below.
A. The mean is lower for the diastolic pressure, but the median is
lower for the systolic...
hi there, having trouble with stats homework
In a random sample of 22 people, the mean commute time to work was 31.5 minutes and the standard deviation was 7.3 minutes. Assume the population is normally distributed and use a t-distribution to construct a 80% confidence interval fo the population mean u. What is the margin of error of u? Interpret the results. The confidence interval for the population mean u is ( 29.4, 33.6) (Round to one decimal place as...
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