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A record executive is interested in the popularity of her label's newest band, The Standard Deviations. She asks 10 people how many Standard Deviations songs they know. Her data are:
0
3
4
5
7
10
12
15
We can use the bar graph to represent the above frequency distribution by taking 'values' along x axis and 'frequency' along y-axis in excel.
Describe the distribution of scores in your sample.
a. Positively skewed
b. Negatively skewed
c. Normally distributed
d. Bimodal
At 95% confidence using the critical value approach, test to see if the percentage of defective systems produced by x-Game has exceeded the industry standard.
Describe the given data show a seasonal effect using moving average method. Describe the data which show a seasonal effect.
Calculated test statistic, decision about the null hypothesis interpretation of results, and a list of references consulted.
Of the nine members of the board of trustees of a college, five agree with president on a certain issue. The president selects three trustees at random and asks for their opinions. What is the probability that at least two of them would agree with..
Compare the percentage found in b) to percentage given by Empirical Rule and Chebyshev's Rule. (Make a table 3 x 3).
Mention the critical value of test statistic (Or give the p-value of the test.)
Explain the terms parameter and statistics. Make sure the concepts of population and sample are included in the definitions.
Conduct a statistical test to determine if the sample is representative of the population.
The distribution of 9 ounce bags of a particular bag of potato chips is approximately Normal with a mean of 9.12 ounces and a standard deviation of 0.15 ounces.
At 0.01 significance level is it sensible to conclude that modification reduced number of traffic accidents?
Which of the following statements regarding the coefficient of correlation is true. A value of 0.00 indicates two variables are not related.
To determine the efficiency of the current ticket operation, Mike wishes to examine several queue operating characteristics.
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