In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected 18 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm cubed . An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x overbar equals8.06 cm cubed and sequals 0.8 cm cubed . Conduct the appropriate test at the alpha equals0.01 level of significance. State the null and alternative hypotheses.
Solution :
= 9.02
=8.06
S =0.8
n = 18
This is the left tailed test .
The null and alternative hypothesis is ,
H0 : = 9.02
Ha : < 9.02
Test statistic = t
= ( - ) / S / n
= (8.06 -9.02) / 0.8 / 18
= -5.091
Test statistic = t = -5.091
P-value =0.00004
= 0.01
P-value <
0.00004 < 0.01
Reject the null hypothesis .
There is sufficient evidence to suggest that
In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the...
In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected 19 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm cubed. An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x overbar equals 8.14 cm...
In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected 15 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm cubed. An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x overbare= 8.11 cm cubed...
In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected 23 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm cubed cm3. An analysis of the sample data revealed that the hippocampal volume is approximately normal with x overbar x equals = 8.13 cm...
In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected 13 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm cubedcm3. An analysis of the sample data revealed that the hippocampal volume is approximately normal with x overbarxequals=8.15 cm cubedcm3 and sequals=0.80.8 cm cubedcm3....
In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected 20 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm cubed. An analysis of the sample data revealed that the hippocampal volume is approximately normal with x overbarequals8.13 cm cubed and sequals0.8 cm cubed....
10.3.15-T Question Help In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected 23 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolesce were less than the normal volume of 9.02 cm. An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x=8.15 cm and...
help with all parts please In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected 24 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm. An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x...
In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected 11 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm3 An analysis of the sample data revealed that the hippocampal volume is approximately normal with x#8.02 cm3 and s-o8 cm3. Conduct the appropriate test...
researchers wanted to measure the effect of alcohol on the development of the hippocampal region in adolescents. The researchers randomly selected 12 adolescents with alcohol use disorders. They wanted to determine whether hippcampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cubed. An analysis of the sample data revealed that the hippcampal volume is approximately normal with x =8.28 and s =0.8 conduct an appropriate test at the a =0.05 level of significance. Find the...
10.3.15-T Question Help In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected 18 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm. An analysis of the sample data revealed that the hippocampal volume is approximately normal with x = 8.03 cm and s=0.8...