When are p-values negative? 

Among all of the topics covered in this course up through the year 1870, what do you think are the three most important topics and why? This is a reasoning question, so be sure that your response to the prompt explains your reasoning (EXPLAIN WHY YOU BELIEVE THE TOPICS YOU’VE SELECTED ARE MOST IMPORTANT). *remember — at least 5 paragraphs are required to earn full credit and don’t forget accurate dates*

In the population, the average IQ is 100 with a standard deviation of 15. A team of scientists want to test a new medication to see if it has either a positive or negative effect on intelligence, or not effect at all. A sample of 30 participants who have taken the medication  has a mean of 140. Did the medication affect intelligence?   Perform a Hypothesis test to answer this question.   Note: You do not need to answer here, rather, include your answer with your uploaded scratch paper. 

A study of health care costs for coronary angioplasty versus coronary bypass surgery at a London hospital showed an average cost of 6,176 pounds with a standard deviation of 329 pounds for 231 angioplasties and an average cost of 8,164 pounds with a standard deviation of 264 pounds for 221 bypass surgeries. Is this sufficient evidence to say that the average cost of angioplasty is less than the average cost of bypass surgery?

According to Facebook’s self-reported statistics, the average Facebook user is connected to 80 community pages, groups, and events. For a statistics project a student at Contra Costa College tests the hypothesis that CCC students will average less than 80 such connections. She posts a survey on her Facebook page. Her sample contains 45 responses. She chooses a 5% level of significance. From her data she calculates a t-test statistic of approximately -1.74 with a P-value of about 0.04. What can she conclude?

In linear kinematic movement, all parts of the object move the in same direction, travel the same distance, in the same amount of time. 

80% of Americans start the day with a cereal breakfast. Based on this information, determine if the following statement is true or false. The sampling distribution of the proportions of Americans who start the day with a cereal breakfast in random samples of size 40 is right skewed.

Contractions involving a change in joint angle with varying muscle tension are known as:

What type of muscle action involves the muscle lengthening under tension?

A commonly cited standard for one-way length (duration) of school bus rides for elementary school children is 30 minutes. A local government office in a rural area randomly samples 100 elementary school children in their district and finds an average one-way commute time of 38 minutes with a standard deviation of 8 minutes. Which of the following is the correct set of hypotheses for testing if the average commute time of elementary school students in this district is different than the commonly cited standard of 30 minutes?