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A statistician wants to test for the equality of means in two independent samples drawn from normal populations of people enrolled in a diet program. The number of pound lost at the completion of the program data follow: Sample 1 7 9 6 15 7 10 8 12 Sample 2 2 25 9 15 10 18 5 22 27 3 a. Can the statistician conclude at the 5% signi cance level that there is no di erence between the two population means? b. Estimate with 95% con dence the ratio of the two population variances.
Compare it with the probability distribution of Binomia
Compute expected frequencies for each of the cells in the table in part c). Do you feel that the exponential distribution provides an adequate description of these data?
What is the probability that at least 10 pay cash - Davids gasoline station offers 4 cents off per gallon if a customer pays cash and does not use a credit card.
1. the study you will evaluate for your assignment isbinge drinking and alcohol-related behaviours amongst pacific
What is the correlation between pre-test scores and post-test scores? Assuming the obvious directional hypothesis (i.e., that those who score highly at pre-test tend to score highly at post-test), is the correlation statistically significant?
Find the probability that there are exactly 2 prescriptions for this drug in a given week and find the probability that there are no more than 5 prescriptions for this drug in a given week.
measures of central tendency and dispersion with spssthe statistics for this week become the basis for several other
Identify a business research topic and define the research questions for the identified problem or opportunity
A student surveyed 200 students about hours a night spent sleeping, the data showed a normal distribution with a mean of 6.8 hours and a standard deviation of 0.75 hours. what percentage of the students spent less than 4.55 hours sleeping per..
if mouse weights are normally distributed with a mean weight of 23 and SD of 4. With 10 mice per box, what weight should they use so that no more than 8% of the boxes will have an average mouse weight below that weight?
How are the degrees of freedom for the chi-square hypothesis tests different from those of most other hypothesis tests? In most previous hypothesis tests, the degrees of freedom have been based on sample size.
A researcher hypothesizes that people who listen to music via ear buds have greater hearing loss than those in the general population. On a standard hearing test, the mean (μ) is 24.75. Higher values indicate better hearing
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