State formally the null and alternative hypotheses necessary

Reference no: EM131852738

Dr. Fredericks believes that environment is more important than genetics in influencing intelligence. He locates 12 pairs of identical twins that have been reared apart, one twin in each pair in an enriched environment and the other in an impoverished environment. He administers a standardized IQ test and obtains the results given in Data 15B.

1902_genetics in influencing intelligence.png

(a) State formally the null and alternative hypotheses necessary to conduct a non directional test.

(b) Complete the test at the .05 level of significance, and state your conclusion.

(d) Can Dr. Fredericks conclude that environment is more important than genetics from the results of this test? Explain.

(e) Calculate effect size, g.

(f) Could Dr. Fredericks really have obtained the 12 pairs of twins at random? What effect might this violation of one of the assumptions have on the outcome?

Reference no: EM131852738

Questions Cloud

State formally the null and alternative hypotheses : (a) State formally the null and alternative hypotheses necessary to conduct a non directional test. (b) Complete the test at the .05 level of significance

How much has value of home changed based on the calculator : How much has the value of the home changed based on the CPI calculator? When oil prices drop, who benefits and who loses? Why? How?

Create components of an online community : Create components of an online community as they might apply to the specific use cas you choose now.

What is the contribution margin for each doll sold : How many dolllars in sales does this represent? What is the contribution margin for each doll sold?

State formally the null and alternative hypotheses necessary : Dr. Fredericks believes that environment is more important than genetics in influencing intelligence. He locates 12 pairs of identical twins that have

Assessing the factors that pete will consider : Consider the steps in civil litigation and ADR, and assess the factors that Pete and the ATV manufacturer will consider when deciding whether they should.

Investigating the effects of a new drug : (a) State formally the null and alternative hypotheses necessary to conduct a non directional test. (b) Complete the test at the .05 level of significance.

Calculate the payback period for this project : Calculate the payback period for this project. Calculate the NPV for this project. Calculate the IRR for this project

Explain the benefits and limitations for expansion area : Location consideration for implementation is vital. Please explain the benefits and limitations for expansion in your chosen area.

User Account

All Pages