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The prices in dollars for a graphing calculator are shown below for 8 online vendors. Estimate the population standard deviation in price with 90% confidence.
148 133 136 152 140 143 129 139
A) 5.4 < symbol < 13.7
B) 6.4 < symbol < 12.3
C) 7.1 < symbol < 10.3
D) 7.3 < symbol < 7.9
What does the binomial distribution chart look like? Can I use Excel to come up with this chart?
Pollsters just report the results of hypothesis tests that show statistical significance but not those in which there was insufficient evidence.
a study concluded that among people with a certain virus 99.4 were tested correctly positive while people without the
Which is more likely to occur-more than 60% correct identifications in the sample of 200 or more than 55% correct identifications in a sample of 1,000? Explain.
Suppose Y is a data matrix, and Z = YF for some orthogonal matrix F, so that Z is a rotated version of Y. Show that the variances of the principal components are the same for Y and Z. (This result should make intuitive sense.) [Hint: Find the s..
Olympic Track related question: You know the last 5 race times at the same distance for 8 runners competing in a race. As such, you can calculate the mean, sd, and variance for each.
suppose z is standard normal random variable. calculate the following possibilities.a.pzgt1.5b.p-0.33 ltz lt1.33c. pz
If we assume this is true, what is the probability that in a random sample of 700 undergraduate business students, 181 or more will major in accounting?
State the hypotheses for a right-tailed test.
during the period of time that a local university takes phone-in registrations calls come in at the rate of one every
in a survey of 9000 females. 6431 say they change their nail polish once a week. construct 90 and 95 confidence
1 a contractor has produced the first unit of a laser targeting device at a cost of 45k. historically their learning
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