Evidence to conclude that proportions vary from study

Assignment Help Basic Statistics

Reference no: EM1322986

Q1) In recent study, following percentages of US retail car sales were reported:

Small: 28.1%

Midsize: 47.8%

Large: 7%

Luxury:17.1%

Survey of retail sales in particular city points out that of 100 cars sold recently, breakdown was as follows:

Small: 25

Midsize: 50

Large: 10

Luxury: 15

At alpha = 0.05, is there enough evidence to conclude that proportions vary from those in the study?

Q2) The symbol illustrtaes the:

i) union of events

ii) intersection of two events

iii) sum of the probabilities of events

iv) sample space

Q3) If penny is tossed 3 times and comes up heads all 3 times, probability of heads on fourth trial is:

i) zero

ii) 1/16

iii) 1/2

iv) larger than the probability of tails

Reference no: EM1322986

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