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Does correlation equal causation? Does the strength of correlation depend on the direction of the relationship? What is the meaning of a zero correlation? Explain your answers.
How would you describe a distribution? How are descriptions presented graphically and what are normal data and skewed data? How does this distinction play a part in statistical analysis?
Construct a pie chart of relative frequencies and construct a bar graph of the relative frequencies
The gestation period for human births can be taken as normally distributed with a mean of 266 days and a standard deviation of 16 days.If a gestation period is 276 days, what percentile among human
Determine if the values are uniformly distributed. The researcher is using the chi-square goodness-of-fit test for this analysis.
A business researcher wants to compare her observed distribution of frequency data to an expected distribution of data using the chi-square goodness-of-fit test.
Determine and evaluate the effect size and comment on the impact of proposed difference. Ask yourself and comment on your level of satisfaction with the "practical" significance of the findings.
Develop appropriate hypotheses such that rejection of H0 will support the researcher's contention and repeat the preceding hypothesis test using the critical value approach.
Develop the appropriate null and alternative hypotheses and what is the Type I error in this situation? What are the consequences of making this error?
Calculate the adjusted seasonal factors and calculate the payoff and determine the decision the company should make using each of the decision making under certainty criterion
Develop a regression model to predict the price of stock 1 and 2 based on the Dow Jones Industrial Average
Discuss how accurate you believe these results are using information related the regression models.
Would you classify these data as time series or cross-sectional and which of the variables are quantitative and which are qualitative?
Indicate whether the data generated from this study will be considered cross-sectional or time series. Explain Why and what level of data measurement is obtained from this question? Explain.
Excel or Minitab to generate a list of 40 flyers identification numbers so that those identified can surveyed.
You then sort by random numbers in ascending order. Finally, you take the first 50 sorted employees as your sample. Does this approach constitute a statistical or a nonstatistical sample?
Determine how many miles they live from the Bank, is the mean travel distance for this sample considered a parameter or a statistic? Explain.
Show the histograms and calculate their means and variances and comment on your findings.
Determine whether such subjects do better, on the average, than expected by just guessing and perform the statistical test
State the critical values for testing and what is the probability that this decision strategy will result in a Type I error?
The population variances from both types of digital cameras are equal, is there evidence of a difference in the mean battery life between the two types of digital cameras
Find the p-value in and interpret its meaning and what other assumption is necessary - construct and interpret a 95% confidence interval estimate of the difference between the population
What is the largest possible value of the covariance? Remember that r can be positive or negative and what is the covariance between X and Y
Determine the critical regions for test in terms of the sample mean, what is the probability of a type II error for this test if the true mean is in fact 195 mg and what impact would reducing the samp