Significant differences between the groups

Assignment Help Basic Statistics

Reference no: EM13543967

Items 1 and 2 relate to the following SPSS output. A researcher is interested in characteristics of HIV+ and HIV- adolescents interviewed 166 young adults about their experiences during adolescence. He wished to know, among other things, if there were significant differences in the ages at which HIV+ and HIV- young adults became sexually active. The following is the printout of this analysis:

_______________________________________________________________________

HIV Status N Mean sd Stnd. Error

Age at Positive 57 13.2 2.96576 .39282

first sexual

experience Negative 109 15.1 2.57286 .24644

________________________________________________________________________

Independent Samples Test

_______________________________________________________________________

Levene's Test for

Equality of Variances

F Sig

Age at Equal variance assumed 1.313 .254

first sexual

experience Equal variance not assumed

t-test for Equality of Means

t df sig. mean difference

Age at Equal variance assumed -2.870 164 .005 -1.9

first sexual

experience Equal variance not assumed -2.745 99.66 .007 -1.9

1. Were there significant differences between the groups. Give the relevant stastical data to support your answer?

2. What is the confidence interval associated with your answer to item # 1?

Reference no: EM13543967

Questions Cloud

What is the force exerted by the floor on her hands : A student is about to do a push-up. Her center of gravity lies directly above P on the floor, which is 0.9 m from her feet and 0.5 m from her hands. what is the force exerted by the floor on her hands

Find the value of heavier mass and lighter mass : A simple Atwood’s machine uses a mass less pulley and two masses m1 and m2. Starting from rest, the speed of the two masses is 8.4 m/s at the end of 7.2 s. At that time, the kinetic energy of the system is 62 J and each mass has moved a distance of 3..

What has happened during the 30 minute-incubation : Supply a cell with 3H-thymidine for a period of 30 minutes. What has happened during the 30 minute-incubation?

Moles of a monatomic ideal gas along processes : Consider the expansion of 60.0 moles of a monatomic ideal gas along processes 1 and 2 in the figure below. In process 1 the gas is heated at constant volume from an initial pressure of Pi = 95 kPa to a final pressure of Pf = 190 kPa. In process 2 ..

Significant differences between the groups : Were there significant differences between the groups. Give the relevant stastical data to support your answer and what is the confidence interval associated with your answer to item # 1?

The density of a gas t the temperature and p its pressure : If M is the molar mass, R the gas constant, T the temperature, and P its pressure, which of the following expressions represents the density of a gas

Determine what force is applied to the lid : An 18.7 cm screwdriver is used to pry open a can of paint. If the axis of rotation is 3.07 cm from the end of the screwdriver blade, what force is applied to the lid

Rate must heat be supplied to power plant by burning coal : At a coal-burning power plant a steam turbine is operated with a power output of 465 MW. The thermal efficiency of the power plant is 31.6%. (a) At what rate is heat discarded to the environment by this power plant? (b) At what rate must heat be supp..

The genomes of multiple homo neanderthalensis : After the genomes of multiple Homo neanderthalensis individuals were sequenced,

User Account

All Pages