Q1) Q1) Cases of retinitis pigmentosa have been examined in 2 distinct populations: Swiss (110 individuals) and English (125) individuals. Genetic disease may be inherited in one of 3 ways: sex linked, recessive, and dominant. Survey found:
|
|
English
|
Swiss
|
|
Sex linked cases
|
46
|
1
|
|
Recessive cases
|
25
|
99
|
|
Dominant cases
|
54
|
10
|
|
Total
|
125
|
110
|
Do these data illustrate a important association between ethnic origin and genetic type? Use alpha of 1% and identify null and alternate hypotheses
Q2) Using standard normal table, show critical value for left-tailed test with α = 0.02.
A) 2.05
B) - 2.33
C) - 2.05
D) 2.33
Q3) Eagle Ridge Contractors Association claims average price of home in their subdivision is $125,150 with standard deviation of $7,350. Sample of 36 homes for sale in this subdivision had the average selling price of= $123,550. Is there evidence that costs of homes for sale in this subdivision are really lower than claimed?