Provided below are summary statistics for independent simple random samples from two populations. Use the
pooled t-test and the pooled t-interval procedure to conduct the required hypothesis test and obtain the specified
confidence interval.
ar{x} _(1)=17,s_(1)=6,n_(1)=19,ar{x} _(2)=22,s_(2)=5,n_(2)=13
a. Left-tailed test, alpha =0.05
b. 90% confidence interval
a. What are the correct hypotheses for a left-tailed test?
A. H_(0):mu _(1)=mu _(2)
H_(a):mu _(1)!=mu _(2)
C. H_(0):mu _(1)=mu _(2)
H_(a):mu _(1)>mu _(2)
E. H_(0):mu _(1)<mu _(2)
H_(a):mu _(1)=mu _(2)
B.
H_(0):mu _(1)=mu _(2)
H_(a):mu _(1)<mu _(2)
D. {(:[H_(0):mu _(1)!=mu _(2)]),(H_(a):mu _(1)=mu _(2)):}
F. {(:[H_(0):mu _(1)>mu _(2)]),(H_(a):mu _(1)=mu _(2)):}
Compute the test statistic.
t= (Round to three decimal places as needed.)
Determine the P-value.
Provided below are summary statistics for independent simple random samples from two populations. Use the pooled t-test and the pooled t-interval procedure to conduct the required hypothesis test and obtain the specified confidence interval.
x=17,s=6,n1=19,x2=22,s2=5,n=13
a.Left-tailed test, =0.05 b.90% confidence interval
a. What are the correct hypotheses for a left-tailed test?
O A. Ho:=2 Ha:1#H2
OB.Ho:=2 Ha:1<2
OC.Ho:1=2 Ha:1>2 OE. Ho:<2 Ha:1=2
O D. Ho:1#2 Ha:1=2 O F Ho:1>H2 Ha:1=2
Compute the test statistic
(Round to three decimal places as needed.)
Determine the P-value