The organizers of a 5k race surveyed runners about their finishing times (f) and the number of previous races they had run (n). The organizers found a negative linear relationship between f and n that is best modeled by the equation f=−1.2n+38.1 . What statement is true? The model predicts that for each additional race a runner has run, the finishing time decreases by about 1.2 minutes. The model predicts that the finishing time for a runner in a 5k race is about 38.1 minutes. The model predicts that the finishing time for a runner who has run 1.2 previous 5k races is about 38.1 minutes. The model predicts that the finishing time for a runner who has run 1.2 previous 5k races is about 1.2 minutes.

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general 11 months ago 7127

A researcher posts a newspaper advertisement offering $10 in exchange for participation in a short study. The researcher accepts the first 10 people who respond to the advertisement. Which of the following statements is true about the sample?A. It is a valid sample because money is offered to participants.B. It is not a valid sample because it is only a short study.C. It is a valid sample because the first 10 people were selected to participate.D. It is not a valid sample because it is not a random sample of the population.

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general 11 months ago 5352

Eliza is a 60-year old woman who has been in the workforce for many years. She has made many investments over time as part of her retirement planning. But until now, she has no IRA. Eliza would like to add an IRA to her retirement portfolio. She can make contributions during her remaining 8 working years, but would like to maintain low-risk investments. At this stage of her career, Eliza is in a relatively high tax bracket, but she expects to drop to a lower tax bracket when she retires. At this point, which type of IRA would be best for Eliza, a Traditional or Roth IRA. Explain your reasoning using complete sentences.

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general 11 months ago 5948