1. A storeowner wishes to see if people have a favorite day of the week to shop. A sample of 400 people is selected, and each is asked his her preference. The data are shown. At a = 0.05, test the claim that shoppers have no preference. Day Sun. Mon. Tue. Wed. Thurs. Fri. Sat. Number 28 16 20 26 74 96 140
1. A storeowner wishes to see if people have a favorite day of the week to shop. A
sample of 400 people is selected, and each is asked his her preference. The data are
shown. At a = 0.05, test the claim that shoppers have no preference.
Day Sun. Mon. Tue. Wed. Thurs. Fri. Sat.
Number 28 16 20 26 74 96 140
2. In a recent study, the following percentages of Lebanese retail TV sales based on size
were reported: 27.2% small, 46.5% midsize, 8% large, and 18.3% luxury. A recent
survey of retail TV shop in Beirut indicated that out of 100 TVs sold, 25 were small,
50 were midsize, 10 were large, and 15 were luxury. At α = 0.05, is there sufficient
evidence to conclude that the percentages differ from those stated in the report.
3. A Nutritionist wishes to determine if there is a difference in the type of exercises
selected by male and female customers. A random sample of males and females
provides the following data. At α=0.05, can it be concluded that the type of exercises
selected is independent of the gender of the individual?
Type of Exercises
Jogging Swimming Bodybuilding
Male 284 425 350
Female 458 257 95
4. A survey was taken on how a lump-sum pension would be invested by 45-year-olds
and 65-year-olds. The data are shown here. At a = 0.05, is there a relationship
between the age of the investor and the way the money would invested?
Large company
stock funds
Small company
stock funds
International
stock funds
CDs or money
market funds
Bonds
Age 45 20 10 10 15 45
Age 65 42 24 24 6 24
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