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The width of a confidence interval is defined to be the upper bound of the confidence interval minus the lower bound of the confidence interval. For example, if a confidence interval is (-2.34,9.87), then the width of this confidence interval is 9.87-(-2.34)=12.21. Assume that we are estimating the mean of a population. Assuming that the confidence coefficient, the sample mean and sample standard deviation stay the same, if we decrease the the sample size of a confidence interval from 100 to 50, then the width of that confidence interval will also decrease. True or False?
assume that a sample is drawn and za2 1.65 and s 35. answer the following questionsa if the maximum error of estimate
Suppose the budget has the support of 53% of voters. What is the probability that the newspaper's sample will lead it to predict defeat? The probability is...........round to 2dp.
Assume that the bulb life is normally distributed. At the 10% significance level, do the data provide evidence that the mean life for the company's light bulbs differs from the advertised mean?
Use the Kolmogorov-Smirnov test to discover whether the distribution of location of accidents is uniformly distributed for the month of September
In your workplace? Elsewhere in the business sector? In your education (during your UOPX degree program)? In politics? Explain your response.
Which two types of probability sampling are best suited for business research and statistical data analysis, and why?
Perform all pairwise comparisons among the three programs, using a Tukey adjustment and an overall significance level of 0.05, then interpret all your results.
If 14 citizens of the neighborhood are chosen. A. Find the probability that exactly 12 of them favor building the police substation.
A study wants to examine the relationship between student anxiety for an exam and the number of hours studied. The data is as follows:
After performing a two sample t-test, you see a p-value of 0.0355. Of the following, which is the appropriate conclusion?
consider again the study of the association between depression and cardiac disease survivability which showed that of
1.i have computed an analysis of variance for three groups with 10 observations per group. the degrees of freedom for
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