the mean lifetime of a sample of 150 torch bulbs produced by a company is computed to be 400 hours with a standard deviation of 80 hours . if m is the mean lifetime of all the bulbs produced by the company, test the hypothesis m=450 hours against m=450 hours at 5% level of significance.

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)

Which best describes the construction of a triangle if given the segment lengths of 2 cm, 3 cm, and 5 cm? a) unique triangle b) cannot be determined c) triangle not possible d) more than one triangle

Rewrite so the subject can be y in the formula d=m-y/y+n