Determining critical value for left-tailed test

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Reference no: EM1318124

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?

Reference no: EM1318124

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