Mathematics, 12.12.2020 15:50 symaria
A manufacturer of light bulbs claims that its light bulbs have a mean life of 1520 hr with a standard
deviation of 85 hr. A random sample of 40 bulbs is selected for testing. If the sample produces a mean
value of 1498.3 hrs, is there sufficient evidence to claim that the mean life is less than the manufacturer
claimed? Use ߙ. = 01
1. Parameter?
2. Test?
3. Hypotheses?
4. Conditions?
5. Test Statistic?
6. P-value?
7. Critical Region?
8. Decision?
9. Conclusion?
Answers: 1
Mathematics, 21.06.2019 19:50, adjjones2011
The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:
Answers: 3
Mathematics, 21.06.2019 21:10, basketball6076
Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem
Answers: 3
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