2. Imagine the daily high temperature inToronto was recorded every day for 14 days inJanuary, and the average of thesetemperatures is -3.0°C with a standarddeviation of 3.5°C.a) Calculate an 80% confidence interval forthe mean assuming all necessary conditionshold. Interpret the confidence interval youcomputed. Round your final answer to twodecimal places.b) Explain the meaning of confidenceintervals. How would your confidence levelchange if you accidentally used a widermargin of error? Explain.c) In the 14 days, the range of the maximumdaily temperature was -5°C to 8°C. Recall thatthe average was –3.0°C. What are thepossible implications for the interval youcalculated in part (a)? 1. Based on census data, the unemploymentrate for minority teenagers has been hoveringsteadily at 15%. You suspect that your districthas a much higher unemployment rate for thisdemographic, and you want to get funding toinitiate a program to reduce unemploymentrate to at least national levels. A randomsurvey of 180 from this demographic in yourdistrict revealed a staggering unemploymentrate of 22.2%. Does your data provideevidence that there is a need for such aprogram in your district?a) Formulate the appropriate null andalternative hypotheses.b)Conduct a test of your hypotheses in (a).Show all your steps, including the test statistic,distribution used, and parameters involved.c)Interpret your p-value in the context of thisproblem and report your findings. What doesthe data suggest about unemployment rates inyour district for minority teenagers?

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2. Imagine the daily high temperature in Toronto was recorded every day for 14 days in January, and the average of these temperatures is –3.0°C with a standard deviation of 3.5°C.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section: Chapter Questions

Problem 8SGR

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