Prof. D. Veeashon is interested in what it takes to pass the National Assessment of Basic Statistics (the famous NABS test). She has the research hypothesis that students who study more than 20 hours for the test-that is the population of interest-will score above the national average of 70. She tests this by getting a group of students who plan to take the test and arranging study/tutoring sessions that totaled more than 20 hours for each. D. Veeashon's null hypothesis is: [note: Ho means mu, the population mean according to the null hypothesis] O Po is equal to 0 Po is less than 0 Ho is not known, nor can it be known Po is equal to (or less than) 70 O Ho is greater than 70

The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 52 records of automobile driver fatalities in a certain county showed that 35 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use ? = 0.10. What is the value of the sample test statistic? (Round your answer to two decimal places.)=__   (c)Find the P-value of the test statistic. (Round your answer to four decimal places.)=__

You are a public health researcher.  You want to see if the average age that a person starts smoking has changed over time.  Smokers are recruited to answer a survey that asked at what age they started smoking.  You divided participants into two groups, one is participants under the age of 30 and the second for participants over the age of 30.  The average age for the two groups were compared. Which statistical test would be best to determine if there is a significant different in starting age between the two groups.     one-sample t-test     related samples t-test     independent samples t-test     ANOVA

A researcher hypothesizes that different colors of cars result in different average speeds.  To test this claim, she took a random sample of 20 people who own 4 different colors of colors of cars  (n = 20, N = 80, G = 4), and she then tracks their average speed on the highway for a week of driving.  The following ANOVA table has some of her results.  Please help her answer her research questions by completing the following ANOVA table below and answering the follow-up questions.  Be sure to label your answers with the appropriate letter and show all your work! Source  Sums of Squares     df   Mean Square        F     Effect (between)             Error (within) 100.90     ------ Total 170.10     ------- ------ a) What is the Sums of Squares (SS) between (effect)? b) What are the Mean Square (MS) between (effect) and the MS within (error)? c) What are the degrees of freedom (df) between, the df within, and the df total? d) What is the overall F-statistic? e) Based on the…