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Write the NULL and the ALTERNATIVE hypothesis in WORDS and in SYMBOLS for each of the following.
1. The net weight of a packet of a snack is 150 g. A sample of 50 packets yielded a sample mean weight of 137 g with a standard deviation of 15 g.
2. In a graduate college, the average, length of registration time during a semester is 180 minutes with a standard deviation of 25 minutes. With the introduction of a new registration procedure, a random sample of 100 students' system took an average of 80 minutes with a standard deviation of 12 minutes.
3. The average height of grade 11 female students is 158.2 cm. The mean height of a sample of 50 female students is 160 cm with a standard deviation of 7 cm.​

Sagot :

Lorimanzanoidn

Answer:

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