Chapter 11: Q.33 (page 656)
Complete the table
Short Answer
The table is
Chapter 11: Q.33 (page 656)
Complete the table
The table is
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Get started for freeA sample of commercial businesses was surveyed for recycling one commodity; a commodity here means any one type of recyclable material such as plastic or aluminum. Table shows the business categories in the survey, the sample size of each category, and the number of businesses in each category that recycle one commodity. Based on the study, on average half of the businesses were expected to be recycling one commodity. As a result, the last column shows the expected number of businesses in each category that recycle one commodity. At the % significance level, perform a hypothesis test to determine if the observed number of businesses that recycle one commodity follows the uniform distribution of the expected values.
Business Type | Number in class | Observed Number that recycles one commodity | Expected number that recycles one commodity |
office | |||
Retail/ Wholesale | |||
Food/ Restaurants | |||
Manufacturing/ Medical | |||
Hotel/Mixed |
Table 11.41
A six-sided die is rolled times. Fill in the expected frequency column. Then, conduct a hypothesis test to determine if the die is fair. The data in Table are the result of the rolls.
Face Value | Frequency | Expected Frequency |
1 | 15 | |
2 | 29 | |
3 | 16 | |
4 | 15 | |
5 | 30 | |
6 | 15 |
If , the chi-square distribution has a shape that reminds us of the exponential.
Consumers may be interested in whether the cost of a particular calculator varies from store to store. Based on surveying stores, which yielded a sample mean of and a sample standard deviation of , test the claim that the standard deviation is greater than .
The standard deviation of heights for students in a school is . A random sample of students is taken, and the standard deviation of heights of the sample is . A researcher in charge of the study believes the standard deviation of heights for the school is greater than .
What type of test should be used?
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