#9) "The standard deviation of the words per minute a college student can type is 2.4 wpm. The words per minute a colleg

[answerhappygod]

9 The Standard Deviation Of The Words Per Minute A College Student Can Type Is 2 4 Wpm The Words Per Minute A Colleg 1 (52.41 KiB) Viewed 22 times

#9) "The standard deviation of the words per minute a college student can type is 2.4 wpm. The words per minute a college student can type is normally distributed, but researchers want to test the hypothesis that the standard deviation is less than 2.4 wpm with a 0.01 level of significance. a) Write the null and alternative hypotheses for this hypothesis test. Make sure you write the correct parameter, inequality, and values. (1 point) b) After surveying 25 people, the standard deviation of the number of words they can type is 1.8 wpm. Find the test statistic. (1 point) c) Do you reject the null hypothesis? Why or why not? (2 points) a d) Write a conclusion of what this hypothesis test says about the standard deviation of a college student's typing speed. (1 point) - e) Without recomputing or conducting the hypothesis test again, would you expect the probability of rejecting the null hypothesis to be larger or smaller if the researchers used a 0.05 level of significance instead? Explain your choice. (1 point)