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You are interested in whether the data you have collected provide sufficient evidence to indicate a difference in mean serum uric acid levels between individuals without Down's syndrome and individuals with Down's syndrome. The data consist of serum uric acid readings on 12 individuals with Down's syndrome and 15 individuals without Down's syndrome. The means are 4.5 mg/100 ml for the Down's sample and 3.4 mg/100 ml for the sample of individuals without Down's syndrome. Assume that the two independent samples are drawn from normally distributed populations with variances equal to 1 and 1.5 for the Down's and non-Down's samples, respectively. Do you have sufficient evidence to indicate a difference in uric acid levels? Assume α = 0.05, state the hypothesis that you are testing, show all calculations, provide the p value for the test statistic, and provide the 95% confidence interval for the difference between the two means.
The laboratory technician accidentally mixed NaHCO3 with BaCl22H2O instead of KCl when preparing unknown mixtures for this experiment.
Use Statistical Table II Binomial Probabilities. In a random sample of 20 students, what is the probability that more than half initially answer the question.
Is there sufficient evidence for concluding that true average repair time exceeds 200 min? Carry out a test of hypotheses using a significance level of .05.
The MAPP process was developed by the National Association of County and City Health Officials to assist communities in assessing health needs and developing health improvement plans. Select a location from the website:
Are these results sufficient to conclude that the self-hypnosis has a significant effect? Assume that increasing and decreasing allergic reactions are equally likely if the training has no effect. Use an alpha of .05."
You are given an annual time series with 40 consecutive values and asked to fit a fifth-order autoregressive model.
If they have a GPA that falls in the range between 2.50 and 3.50, what is their z score and percentage of the area do they fall in?
What is the research question of interest for this survey?- What is the population parameter in this study? What is the appropriate statistical notation (symbol) for this parameter?
Please provide a 95% confidence interval estimate of the annual population alcohol consumption (in liters) among European women:
KMT industry's net income is $250,000, total debt is $2.5M, and debt ratio is 55%. What us KMT industry's ROE?
Using z-scores, a population with m = 37 and s = 6 is standardized so that the new mean is m = 50 and s = 10. How does an individual's z-score in the new distribution compare with his/her z-score in the original population?
a gardener has 1000 square yards of land available to devote to cash crops. profits expected by crop are 20 per square
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