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To estimate the prevalence of HIV, the State of New York implemented a policy of testing women who gave birth. The test that was used is known as ELISA; it is actually a test for the HIV antibody. Ass
A study is conducted to determine if time of day has any effect on test grades. An introductory psychology class is selected for the study, because it has a standard curriculum taught across many sect
For a simple random walkXnwith absorbing boundaries at 0 and 4, and step-up probabilityp= 2/3, assume that initially it is uniformly distributed on states 1, 2, 3.
mortgage broker is offering home mortgages at a rate of 9.5%, but the broker is fearful that this valueis higher than many others are charging. A sample of 40 mortgages filed in the county court
In a hypothesis test for the population variance, the alternate hypothesis is the population variance doesnot equal 17.0. The significance level to be used is 0.05 and the sample size to be taken is 2
In testing for the equality of two population variances, when the populations are normally distributed, the10% level of significance has been used. To determine the rejection region, it will be necess
When a customer places an order with Office Works, a computerised Accounting Information System (AIS) automatically checks to see if the customer has exceeded his or her credit limit. Past records ind
Do a feasibility study to assess the likelihood of the project being completed and producing useful results. If possible, the feasibility study should contain some preliminary results (e.g. a pilot da
The case information stated that 66% of teenagers purchase products that reflect their style and image as being hip and trendy. How would you test the appropriateness and validity of that percentage?
A local pizza parlor advertises that their average time for delivery of a pizza is within 30 minutes of receipt of the order. To check the accuracy of their claim, the delivery time for a random sampl
Medication, 47% take cholesterol-lowering medication, and 12% take both medications. What is the probability that a senior citizen takes either blood pressure-lowering or cholesterol-lowering&nbs
Why does APA recommend that we calculate a measure of effect size in addition to calculating the test statistic?
A few years ago, the Department of Education published information about education in the United States. It reported the average amount (dollars per student) spent by public schools in each state duri
A researcher conducted an experiment on the effects of a new multivitamin on energy level, with a control group (received nothing), a placebo group
MSA Computer Corporation manufactures two models of minicomputers, the Alpha 4 and Beta 5. The firm employs 5 technicians, working 160 hours each per month, on its assembly line.
How many social robots would need to be sampled in order to estimate the proportion of robots designed with legs, no wheels to within .075 of its true value with 99% confidence. Given that a
Composite sampling is a way to reduce laboratory testing costs. A public healthdepartment is testing for possible fecal contamination in public swimming pools. In thiscase, water samples from 5 pools
How many social robots would need to be sampled in order to estimate the proportion ofrobots designed with legs, no wheels to within .075 of its true value with 99%confidence
Peter, Paul, Mary, John and Martha are members of the pastoral council at a localchurch. They are to be seated at one side of a long conference table in a pastoral councilmeeting.
The probability that an individual egg in a carton of eggs is cracked is 0.03. You havepicked out a carton of 1 dozen eggs (that’s 12 eggs) at the grocery store.
Find out whether palliative care improves the mental health of people with advanced HIV.
Complete the ANOVA summary table and perform post hoc comparisons, if necessary and what conclusions can be drawn from the F-ratio and the post hoc comparisons?
You notice in your introductory psychology class that more women tend to sit up front, and more men in the back. To determine wheather this difference is significant, you collect data on the seating p
Using an appropriate hypothesis test, at a 5% level of significance, can you conclude that there is any difference between the average value between houses that have a fireplace (Fireplace = 1) and ho
With3 discrete variables(50 states, urban, and rural) and2 continuous variables(average time, 5 types of transportation). I need themean, median, mode, standard deviation.