Determining confidence interval for mean growth rate

Reference no: EM1320475

Q1) Horticulturalist wishes to study growth rate of a particular variety of Bougainvillea. From sample of 16 randomly selected Bougainvilleas, mean growth rate was 2.23 inches/week and sample standard deviation was 0.77 inches/week. Determine a 90% confidence interval for mean growth rate of all Bougainvilleas

a) Between 1.723 and 2.634 inches/week

b) Between 1.893 and 2.567 inches/week

c) Between 1.991 and 2.469 inches/week

d) Between 1.460 and 3.000 inches/week

Student Services office did survey of 500 students in which they asked if student is part-time or full-time. Another question asked whether student was transfer student.

	Transfer	Non-Transfer	Row Totals
Part-Time	100	110	210
Full-Time	170	120	290
Column Totals	270	230	500

Q2) If student is selected at random (from this group of 500 students), determine probability that student is transfer student.

a) 100/500

b) 270/500

c) 210/500

d) 170/500

Q2) If student is selected at random (from this group of 500 students), determine probability that student is a part time student.

a) 210/500

b) 270/500

c) 170/500

d) 100/500

Q3) If student is selected at random (from this group of 500 students), determine probability that student is transfer student and part time student.

a) 210/500

b) 170/500

c) 270/500

d) 100/500

Q4) If student is selected at random (from this group of 500 students), determine probability that student is transfer student or part time student.

a) 210/500

b) 170/500

c) 380/500

d) 480/500

Reference no: EM1320475

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