Greg is in his first semester at a university and is taking a calculus course with a large enrollment. He just took the first midterm exam and is nervous about his score. Among all the students in the course, the mean of the exam was 55 with a standard deviation of 7. Greg scored a 74 on this exam. Find the z-score of Greg's exam score relative to the exam scores among all the students in the course. Round your answer to two decimal places.

Q: Find the standard deviation of this number set: {2, 4, 9} showing all of the steps involved as shown…

A:

Q: Illustration : The mean and standard deviation of a set c 100 observations were 40 and 5 respective…

A: Mean is the average value of given observations. For a set of 'n' observations, mean is the sum of…

Q: In a neighborhood donut shop, one type of donut has 330 calories, three types of donuts have 400…

A: In a donut shop one type of donut has 330 caloriesthree types of donuts have 400 caloriessix types…

Q: A city’s temperature is modeled as a random variable with mean and standard deviation both equal to…

A: Convert the mean temperature from degrees Celsius to degrees Fahrenheit So, the mean temperature in…

Q: If the grades are normally distributed and 8 students received a B, how many students took the…

A: Let C denote the grades of students. Given that X follows N(mean = 82, SD = 5), then  Z = (X -…

Q: Mary took 4 courses last semester: Calculus, Physics, Biology, and History. The means and standard…

A:

Q: An incoming MBA student took placement exams in economics and mathematics. In economics, she scored…

A:

Q: The GMAC Insurance company reported that the mean score on the National Drivers Test was 67.5 with a…

A:

Q: Write a sentence in your lab report explaining the effect that adding the two new data points had on…

A: From the given information,Original data points = {60,31,50,48,50,54,56,62,53}New additional points…

Q: standardized algebra test in different states. Kaitlyn takes the test for Virginia and scores a 458.…

A:

Q: Members Best Investment Bank created a global product. The research team found the product mean was…

A: The given mean is 123 and standard deviation is 46.

Q: a student had 93% in chemistry had a class average of 85% and standard deviation of 8%. the same…

A: Consider that the mean and standard deviation of a random variable x are µ and σ, respectively.…

Q: Steven ran the 100 meter dash in 13 seconds.  What is his T-score if the class mean was 14 seconds…

A: t statistic

Q: The average and standard deviation for ACT scores are 20 and 3 respectively. average and standard…

A:

Q: aul received a score of 70 on a history test for which the class meam ass? biology test O history…

A: Concept: A z-score is known as the standard score that determines how much the data point deviates…

Q: Lisa took 4 courses last semester: Physics, Biology, History, and Calculus. The means and standard…

A: Lisa took 4 courses last semester, we need to convert Lisa's scores into z-scores. Since, z-score =…

Q: The average IQ of the adult population is 100. A researcher believes that average IQ of the…

A: The sample mean is calculated as follows: Mean = (69+79+89+99+109)/5           = 445/5           =…

Q: Raul received a score of 62 on a history test for which the class mean was 52 with standard…

A:

Q: In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores…

A: Given that,The middle 68% of the scores fall between 77 and 93.

Q: There is a weekend fishing competition that Justin participates in each year. There are several…

A: X: number of fish caught this year.mean(μ)=35standard deviation(σ)=9justin caught 45 fish at the…

Q: Given the data: 47, 55, 57, 63, 73. Find the standard deviation. Round the final answer to the…

A:

Q: Tina's science fair project was to estimate the mean amount of chemicals in her city's water supply.…

A: Solution:  Relationship between the sample size and the confidence interval:   If the sample size or…

Q: For a statistics test the mean is 63 and the standard deviation is 7.0, and for a biology test the…

A: We know that ,Z-score=x-μσ

Q: Is there a doctor in the house? A market research firm reported the mean annual earnings of all…

A: That is, there is no evidence to conclude that the mean salary for family practitioners in Los…

Q: Sarah​'sscore on the Stats midterm was 81 points. The class average was 76 and the standard…

A: Given that  Mean = 76 SD = 5 And the Sarah's score is X = 81

Q: Kathy is a business administration major at Florida State University. She is comparing her…

A: The z-value is the standardized value that explains about the relative measure of a data value. The…

Q: Tony decided that he wants to pursue a master degree in business. One of the requirement is the GMAT…

A: Given that  Tony's GMAT = X = 730 Mean = 556 , Standard deviation = 116

Q: Adam just graded his exams. the mean score is 74, the median is 76.5, the range is 65 and the…

A: given data  mean = 74 median = 76.5 range = 65 standard deviation = 11 add 7 points to each score…

Q: Find a. the mean; b. the deviation from the mean for each data item; and c. the sum of the…

A: Given data set is 157, 158, 163, 167, 170 n=No. of observation=5

Q: A study commissioned by a clothing manufacturer measured the Waist Size of 250 men, finding a mean…

A: Suppose the variable x denotes the waist size of men. The researchers measured the waist sizes of…

Q: For standard deviation, the x-x or the y-y, which numbers do you use?

A: Please find the explanation below.

Q: Ivan and his family are relocating to Los Angeles and have found a great area in which to live. The…

A:

Q: Randy took a standardized test that is normally distributed. He scored a 105 on the test. The…

A: Given  Mean=mu=94 , Standard deviation=sigma=6.2 X=105 X~Normal(mu=94,sigma=6.2)…

Q: What is the mean and median? The x axis is in years. This is for Stats/ class. 400 300 200 100- 40…

A:

Q: Mark went around the neighborhood collecting spare change for charity. The 7 families gave: $5.00 ,…

A: The spare change amount given by families for charity is:- $ 5.00 $ 4.00 $ 4.00 $ 6.00 $…

Q: The mean of data set A is 42. The mean of data set B is 47. The mean absolute deviation (MAD) of…

A: The mean of data set A is 42.

Q: uan and his family are relocating to Los Angeles. They purchased a home they really like, which cost…

A: Solution: Given information: μ= $735000  Population mean σ=$17050  Population standard deviation.

Q: Find the standard deviation of the following -14, -4,-10, -12, 5, -1.

A: