phillipmccormick
30.08.2019 •
Mathematics
5times the difference of a number and 20 is the same as half the sum of 4 more than four times a number
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Ответ:
Ответ:
Step-by-step explanation:
Given that a random sample of 90 companies taken in 2006 showed that 14 offered high-deductible health insurance plans to their workers. A separate random sample of 120 firms taken in 2007 showed that 30 offered high-deductible health insurance plans to their workers.
H0: p1=p2
Ha: p1 <p2
(Two tailed test at99%)
Difference14.44 %
Chi-squared5.883
DF 1
Significance levelP = 0.0153
Since p >0.01, our alpha reject null hypothesis.
NO. Based on the sample results, you can not conclude that there is a higher proportion of companies offering high-deductible health insurance plans to their workers in 2007 than in 2006