A new study suggests that women with asthma exposed to air pollution, even before conception, significantly increase the
Posted: Thu May 05, 2022 8:25 pm
A new study suggests that women with asthma exposed to air
pollution, even before conception, significantly increase their
risk of delivering a premature baby. The researcher reported
gestational ages for two groups of women with asthma – one group of
45 women exposed to air pollution (mean = 36 weeks with a standard
deviation of 1 week) and another group of 47 women not exposed to
air pollution (mean = 39 weeks with a standard deviation of 1
week). Which one of the following statements is INCORRECT? (Set
alpha level at 0.05; Pooled standard deviation = 1) The degrees of
freedom is 91.
a. The obtained test statistic is approximately -14.38.
b. The null hypothesis is that gestational age is not different
between women with asthma who are exposed to air pollution and
those who are not exposed to air pollution.
c. The decision should be to reject the null hypothesis.
d. The critical test statistic is 1.960. e. The ratio of
variances is 1.
pollution, even before conception, significantly increase their
risk of delivering a premature baby. The researcher reported
gestational ages for two groups of women with asthma – one group of
45 women exposed to air pollution (mean = 36 weeks with a standard
deviation of 1 week) and another group of 47 women not exposed to
air pollution (mean = 39 weeks with a standard deviation of 1
week). Which one of the following statements is INCORRECT? (Set
alpha level at 0.05; Pooled standard deviation = 1) The degrees of
freedom is 91.
a. The obtained test statistic is approximately -14.38.
b. The null hypothesis is that gestational age is not different
between women with asthma who are exposed to air pollution and
those who are not exposed to air pollution.
c. The decision should be to reject the null hypothesis.
d. The critical test statistic is 1.960. e. The ratio of
variances is 1.