Below is the Output from a Paired Samples comparing the number of vegetables students eat, versus the number of fruits they eat. The researcher who conducted the study believes students eat fewer fruits than vegetables. Using this output, answer the questions below A) Report the t-statistic (including the de

Below is the Output from a Paired Samples comparing the number of vegetables students eat, versus the number of fruits they eat. The researcher who conducted the study believes students eat fewer fruits than vegetables. Using this output, answer the questions below A) Report the t-statistic (including the de

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 2GP

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Jeffrey, as an eight-year old, established a mean time of 16.43 seconds for swimming the 25-yard freestyle, with a standard deviation of 0.8 seconds. His dad, Frank, thought that Jeffrey could swim the 25-yard freestyle faster using goggles. Frank bought Jeffrey a new pair of expensive goggles and timed Jeffrey for 15 25-yard freestyle swims. For the 15 swims, Jeffrey’s mean time was 16 seconds. Frank thought that the goggles helped Jeffrey to swim faster than the 16.43 seconds. Conduct a hypothesis test using a preset α = 0.05.Set up the Hypothesis Test.
Mrs. Smith's reading class can read a mean of 175 words per minute with a standard deviation of 20 words per minute. The top 3% of the class is to receive a special award. What is the minimum number of words per minute a student would have to read in order to get the award?
Aaron, as a fifteen-year-old, established a mean time of 16.43 seconds for swimming the 25-yard freestyle, with a standard deviation of 0.8 seconds. His dad, Sam, thought that Aaron could swim the 25-yard freestyle faster using goggles. Sam bought Aaron a new pair of expensive goggles and timed Aaron for 15 25-yard freestyle swims. For the 15 swims, Aaron’s mean time was 16 seconds. Sam thought that the goggles helped Aaron to swim faster than the 16.43 seconds. Question 1: Conduct a hypothesis test using a preset = 0.05. Assume that the swim times for the 25-yard freestyle are normal.
The quality control manager at a light bulb factory needs to estimate the mean life of a large shipment of light bulbs. The standard deviation is 84 hours. A random sample of 49 light bulbs indicated a sample mean life of 270 hours. Do you think that the manufacturer has the right to state that the lightbulbs have a mean life of 320 hours? Explain. Based on the sample data, the manufacturer _____ the right to state that the lightbulbs have a mean life of 320 hours. A mean of 320 hours is less than 2 more than 4 standard errors ______ the sample mean, so it is ________ likely highly unlikely that the lightbulbs have a mean life of 320 hours.
according to the US census bureau,the mean of the commute time to work for a resdient of louisville,kentucky 23.9 minutes. assume that the standard deviation of the commute time is 7.5 minutes. What minimum percentage of commuters in louisvile has a commute time within 3 standard deviation of the mean?
The mean amount of money last year spent by customers at the Texas Roadhouse in Cedar Falls, Iowa was $37. The restaurant manager believes that the mean may be higher this year. State the appropriate null and alternative hypotheses.
Does a small standard deviation signify more or less uncertainty in the data ? Explain.