In Research on Cell Phone Use by Teenagers,it Was Found

question 11

Essay

In research on cell phone use by teenagers,it was found that the average connect time for a call was at least 15 minutes.Social psychologists feel that this study understated the time.To determine this claim,cell phone bills for 15 teenagers were evaluated.On average,the time spent was 18.5 minutes,with a sample standard deviation of four minutes.(Assume a normal distribution. )What is the critical value for α = .001 to test the hypotheses.Determine whether the null hypothesis can be rejected at this level.

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Definitions:

Diploid

Referring to cells that contain two complete sets of chromosomes, one from each parent, characteristic of the body's somatic cells.

Tetraploid

An organism or cell having four complete sets of chromosomes, a condition that can result from the doubling of chromosomal number.

Polyploid

An organism or cell having more than two paired (homologous) sets of chromosomes, often resulting in biological diversity or adaptation.

Abscisic Acid

A plant hormone that regulates growth and development processes, including seed dormancy and response to environmental stress.