A Question Completion Status: 10 2 3 4 5 6 7 8 9 10 A Moving to another question will save this response. Question 2 Question 2 of 10 > 1 points Save Answer On a history test Patrick received a grade of 43 out of 50. The class mean was 35 with a standard deviation of 6. His girlfriend Kristin, in another section, received a grade of 87 out of 100. Her class mean was 75 with a standard deviation of 10. z-score for Patrick's grade = (round to two decimal places) (round to two decimal places) z-score for Kristin's grade = Who received the higher grade relative to their respective classes? Why? Moving to another question will save this response. Q Search A F4 DII LO a Question 2 of 10>> 1:48 5/30/2 PrtScn Home End PgUp PgDn FB F9 F10 711 F12 FS F6

Mario scored 82 on his history final. The class mean was 78 with a standard deviation of 3 points. He scored 72 on his biology final with a mean score of 65 and a standard deviation of 5 points. Which grade was better compared with the class mean referencing a normal distribution?   a. The biology test is better. The z-scores for the biology exam and the history exam respectively are 1.4 and 1.33.   b. The biology test is better. The z-scores for the biology exam and the history exam respectively are 1.33 and 1.4.   c. The history test is better. The z-scores for the biology exam and the history exam respectively are 1.33and 1.4.   d. The history test is better. The z-scores for the biology exam and the history exam respectively are 1.4 and 1.33.

Raul received a score of 77 on a history test for which the class mean was 70 with a standard deviation of 9. He received a score of 75 on a biology test for which the class mean was 70 with standard deviation 4.  On which test did he do better relative to the rest of the class

My Physics professor announced that top 18% will get A in the class.               Class mean is 72, and standard deviation is 6. To get the grade A, what score should I get at least?

Jack had an average score of 75 with a standard deviation of 3. Mikes z-score was 1.85. His actual score was

The distribution of heights of adult men is approximately normal with mean 69 inches and standard deviation 2.5 inches. Bob's height has a Z-score of -2.5 when compared to all adult men. In 1-2 sentences, interpret what this Z score tells about how Bob compares to other men in terms of height.

After calculating the mean and standard deviation, how do we interpret the result, and when a variable look strange?

Marjorie More Mileage is obsessed with getting the best gas mileage possible for her 2017 Toyota Prius. She learns from the official Toyota web site that the official average mileage for all 2017 Prius is = 58.2 mpg with a standard deviation of = 1.2 mpg. Marjorie purchased a set of “hyper mileage” tires on-line that are supposed to improve gas mileage. For the next 100 fill ups, Marjorie noticed an average gas mileage of = 58.5 mpg. Help Marjorie perform a hypothesis test at a 1% level of significance to determine if her new tires actually improved her gas mileage.   What is the null hypothesis? What is the alternate hypothesis? Is this a left tail, right tail, or two tail test? Calculate the test statistic. State your conclusion.

An environmental researcher took 30 water samples from different areas of a lake. He measured the pH level of each water sample. The standard deviation for the 30 pH levels was about 1.4.What is the best interpretation of the standard deviation? The pH level of a typical water sample was about 1.4 units from the mean on average. The difference between the minimum and maximum pH levels was about 1.4 units. The entire lake had a pH level that was about 1.4 units. The pH level of any given water sample was about 1.4 units from the mean. - this one is wrong

A person’s IQ must be in the upper 2% of the population to be considered into the Honor Society.  If the mean score is 100 and the standard deviation is 15, what score must a person have to qualify for the Honor Society?