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Chapter 11: Q.69 (page 658)
Decide whether the following statements are true or false:
As the number of degrees of freedom increases, the graph of the chi-square distribution looks more and more symmetrical.
The given statement is true.
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The table provides a recent survey of the youngest online entrepreneurs whose net worth is estimated at one million dollars or more. Their ages range from to . Each cell in the table illustrates the number of entrepreneurs who correspond to the specific age group and their net worth. Are the ages and net worth independent? Perform a test of independence at the significance level.
Refer back to the information in Try It. How many service providing jobs are there expected to be in ? How many nonagriculture wage and salary jobs are there expected to be in ?
A teacher predict that the distribution of grades on the final exam will be and they are recorded in table 11.27
The actual distribution for a class of 20 is in table 11.28
test statistic is -------
A teacher predict that the distribution of grades on the final exam will be and they are recorded in table 11.27
The actual distribution for a class of 20 is in table 11.28
State the null and alternative hypothesis
Table contains information from a survey among participants classified according to their age groups. The second column shows the percentage of obese people per age class among the study participants. The last column comes from a different study at the national level that shows the corresponding percentages of obese people in the same age classes in the USA. Perform a hypothesis test at the % significance level to determine whether the survey participants are a representative sample of the USA obese population.
| Age Class (Years) | Obese Expected (percentage) | Obese Observed (Frequencies) |
Table
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