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New computer monitors? The purchasing department has suggested that all new computer monitors for your company should be flat screens. You want data to assure you that employees will like the new screens. The next 20 employees needing a new computer are the subjects for an experiment.
(a) Label the employees 01 to 20. Randomly choose 10 to receive flat screens. The remaining 10 get standard monitors.
(b) After a month of use, employees express their satisfaction with their new monitors by responding to the statement "I like my new monitor" on a scale from 1 to 5, where 1 represents "strongly disagree," 2 is "disagree," 3 is "neutral," 4 is "agree," and 5 stands for "strongly agree." The employees with the flat screens have average satisfaction 4.8 with standard deviation 0.7. The employees with the standard monitors have average 3.0 with standard deviation 1.5. Give a 95% confidence interval for the difference in the mean satisfaction scores for all employees.
(c) Would you reject the null hypothesis that the mean satisfaction for the two types of monitors is the same versus the two-sided alternative at significance level 0.05? Use your confidence interval to answer this question. Explain why you do not need to calculate the test statistic.
Refer to and apply Erikson's theory and the commentary provided in this week's textbook readings on midlife crisis. Relate Erikson's work specifically to personal priority rearrangements that may occur in middle adulthood. Explain how the concept of ..
If you were using the relative frequency of an event to estimate the probablility of the event, would it be better to use 100 trials or 400 trials according to the law of large numbers?
In fitting a least squares line to n=15 data points, the following quantities were computed: SSxx=55, SSyy=198, SSxy=-88, x-bar=1.3, and y-bar=35.
Translate the following statements into symbolic form using capital letters to represent affirmative English statements.- Cooling a group of atoms to absolute zero and keeping them bunched together is a necessary and sufficient condition for produc..
An auditor selected a random sample of 12 accounts from all accounts receivable of a given firm.- Compute an estimate of the mean amount of all accounts receivable. Give an estimate of the variance of all the amounts.
Draw the appropriate conclusions with respect to female and male human resource manager salary levels. Calculate the t value for independent groups for the following data.
in an instant lottery your chances of winning are 0.2. if you play the lottery five times and outcomes are independent
A state representative is reported as saying that about 10% of reported auto thefts involve owners whose cars have not really been stolen, but who are trying to defraud their insurance company.- What null and alternative hypotheses would be approp..
a car commercial advertises that a certain brand of car averaged at least 33 miles per gallon of gasoline. to verify
a survey found that womens heights are normally distributed with mean 62.3 in. and standard deiation 2.3 in. the survey
association we know association does not imply causation but what does this mean in your own words. provide and discuss
Enzyme immunoassay (EIA) tests are used to screen blood specimens for the presence of antibodies to HIV, the virus that causes AIDS. Antibodies indicate the presence of the virus.
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