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1.) The mean number of English courses taken in a two-year time period by male and female college students is believed to be about the same. An experiment is conducted and data are collected from 29 males and 16 females. The males took an average of three English courses with a standard deviation of 0.8. The females took an average of four English courses with a standard deviation of 1.0. Are the means statistically the same?2.) A student at a four-year college claims that mean enrollment at four-year colleges is higher than at two-year colleges in the United States. Two surveys are conducted. Of the 35 two-year colleges surveyed, the mean enrollment was 5,068 with a standard deviation of 4,777. Of the 35 four-year colleges surveyed, the mean enrollment was 5,466 with a standard deviation of 8,191.
"These are to be complete Hypothesis test starting with Ho & Ha and ending with a decision based on the rejection region or the p-value." "Find Z (crit) for two tail test withα =.05"
james w. has a portfolio that includes 20 shares of disney and 30 shares of amazon. the price of disney stock is
assume that womens heights are normally distributed with a mean of 63.5in and a standard deviation of 2.4in.a if a
Why then does it matter whether we assume straight-line or MACRS depreciation when we assess project NPV?
The batteries used in a digital watch have an operating life that is normally distributed. As sample of 18 batteries reveals a mean of 2.35 years and a standard deviation of 0.4 years.
the assignment is to analyze the data set and identify the companys problem . unbelievably strong hint - its job
Standard deviations for first- and second-time and confidence interval
A decision maker is working on a problem that requires her to study the uncertainty surrounding the payoff of an investment. There are three possible levels of payoff -$1,000, $5,000, and $10,000.
a sample of the monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical
Mention your decision regarding the null hypothesis. If H 0 rejected can we conclude that treatment 2 and treatment 3 differ? Use 95 percent level of confidence.
1.consider a small experiment to investigate if biofeedback can reduce blood pressure. six subjects were randomized to
a in a pavement study the diameter of the aggregate stones is found to be normally distributed with a mean of 4 cm and
How would you interpret the findings of a correlation study that reported a linear correlation coefficient of +0.3?
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