Question

0.05 level of signileai 3.2 movies. At the concluded that this represents a difference from national average? Source: MPAA Study the 5. Nonparental Care According to the Digest of Educa- tional Statistics, a certain group of preschool children under the age of one year each spends an average of 30.9 hours per week in nonparental care. A study of state university center-based programs indicated that a random sample of 32 infants spent an average of 32.1 hours per week in their care. The standard deviation of the popula- tion is 3.6 hours. At ? 0.01, is there sufficient evidence to conclude that the sample mean differs from the national mean? Source: www.nces.ed.gov 6. Cost of Building a Home According to the National Association of Home Builders, the average cost of build- ing a home in the Northeast is $117.91 per square foot. A random sample of 36 new homes indicated that the mean cost was $122.57 and the standard deviation was $20. Can it be concluded that the mean cost differs from $117.91, using the 0.10 level of significance? 8-23

Answer 1