Answer:
A
B
C
D
The oxygen treatment is effective because
1 the is no 0 in the interval telling us that the treatments are different
2 the upper and the lower limit are positive tell us that the proportion of those treated by the oxygen treatment is greater
Step-by-step explanation:
From the question we are told that
The first sample size is
The number of patient which the oxygen cured is k = 113
The second sample size is
The number of patient that placebo cured is l = 35
The first sample proportion is
The second sample proportion is
The null hypothesis is
The alternative hypothesis is
Let assume the level of significance be
Generally the pooled proportion is mathematically evaluated as
substituting values
Generally the standard error is mathematically represented
substituting values
Generally the test statistics is mathematically represented as
The p-value is from the normal distribution table as
given that the null hypothesis is rejected
From the normal distribution table the critical value of is
Generally the margin of error is mathematically the represented as
The 95% confidence interval is mathematically represented as
substituting value
The oxygen treatment is effective because
1 the is no 0 in the interval telling us that the treatments are different
2 the upper and the lower limit are positive tell us that the proportion of those treated by the oxygen treatment is greater