20. Which is better: a score of 82 on a math test with a mean of 70 and a standard deviation of 8, or a score of 82 on a chemistry test with a mean of 75 and a standard deviation of 4? Justify your answer (5pts)

Q: An economist wants to find out if there is difference in the monthly expenses of families from…

A: Using t distribution

Q: 4. An instructor at a local community college noted that the grades of his students were normally…

A:

Q: A dataset of 23 values on a variable has a mean of 10.8 and a standard deviation of 3.2. The third…

A:

Q: 2- We would like to survey a number of electric vehicles (EVs) to estimate the average distance EVs…

A: From the provided information, Standard deviation (s) = 80 Confidence level = 95%

Q: 2. The head of a school clinic in a certain elementary school wants to estimate the mean height (in…

A: Given that alpha =0.05,s.d =30 ,M.E = 4

Q: An economist wants to find out if there is difference in the monthly expenses of families from…

A:

Q: is better: a score of 82 on a test with a mean of 70 and a standard deviation of 8, or a score of 82…

A: The z-score corresponding to score of 82 when the mean is 70 and standard deviation is 8.

Q: statistics professor reported that the mean score in a recent quiz is 72 and the standard deviation…

A: Solution

Q: Which is better a score of 82 on a test with a mean of 65 and a standard deviation of 15, or a score…

A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

Q: A analyst wants to determine if the average TA spends less time solving a question than the average…

A: Solution: LetX1 be the time to solve a question by TA and X2 be the time to spend by a honor…

Q: The number of assists per match for the setter on your school's volleyball team has a mean of 55 and…

A: Given,   Mean(μ) =55 Standard deviation(σ)=7

Q: Which is better a score of 91 on a test with a mean of 81 and a standard deviation of 15, or a score…

A:

Q: An economist wants to find out if there is difference in the monthly expenses of families from…

A: Given that

Q: The National Center for Health Statistics reported that the mean total cholesterol level in 2002 for…

A:

Q: A set of math test scores has a mean of 70 and a standard deviation of 8.  A set of English test…

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

Q: An economist wants to find out if there is difference in the monthly expenses of families from…

A:

Q: What is the raw z-score?

A: Given information Population Mean = mu= 120 Standard deviation = s= 50 Raw score = x =65 Z score = ?

Q: Suppose that heights of adult men in the United states are normally distributed with a mean of 71…

A:

Q: The resting heart rates of a group of healthy adult men were found to have a mean of 73.4 beats per…

A: The resting heart rates of a group of healthy adult men with Mean = 73.4 Standard deviation = 5.9

Q: tor at a college noted that the grades students were normally distributed with a mean o and a…

A: Let "a" be the minimum score needed to make an A. A person scoring at least "a" marks will be…

Q: 2. Fifty applicants took an IQ test and their mean score was 100 with a standard deviation of 20.…

A:

Q: The General Social Survey polled a sample of 1056 adults in the year 2015, asking them how many…

A: From the provided information,

Q: Which is better a score of 92 on a test with a mean of 71 and a standard deviation of 15, or a score…

A:

Q: An economist wants to find out if there is difference in the monthly expenses of families from…

A:

Q: The standard deviation on a final examination was 9, while the mean grade was 72. The best 14% of…

A: GivenMean(μ)=72standard deviation(σ)=9

Q: Which is better a score of 95 on a test with a mean of 70 and a standard deviation of 15, or a score…

A:

Q: What percent of the students received a score below 64, if the mean grade on a test was 70 and the…

A:

Q: The results of a common standardized test used in psychology research is designed so that the…

A: Given Information: Population mean (u) = 165  Standard deviation (σ) = 10  Score earned by a subject…

Q: 6) A music industry professional claims that the average amount of money that an average teenager…

A: Given that  Hypothesized Population Mean (\mu)(μ) = 5050 Population Standard Deviation…

Q: 2. Roland received a score of 70 for which the mean score was 65.5. Roland has learned that the z-…

A: Given, Z=0.6 μ=65.5

Q: Suppose you received a score of 95 out of 100on exam 11 . The mean was 79and the standard deviation…

A:

Q: P1.  To confirm the effectiveness of some medicine, its concentration in blood must exceed 400 ppm…

A: NOTE: Since we only answer up to 3 sub-parts, we'll answer the first 3. please resubmit the question…

Q: The results of a common standardized test used in psychology research is designed so that the…

A: From the provided information, Mean (µ) = 175 Standard deviation (σ) = 10 X~N (175, 10) Here X be a…

Q: 2.5% Of scores on a normally distributed college entrance test or below 60% and 2.5% of the scores…

A:

Q: My Physics professor announced that top 18% will get A in the class.               Class mean is 72,…

A: Let X= score of a student  Given that X follows a normal distribution with mean=72 and standard…

Q: 4. What is the range of data values that would allow 99% of the fall within the mean? 5. Why does…

A: “Since you have mentioned the question number 4 and 5, we will solve that question for you. If you…

Q: What is the z score for 120 when mean is 100 and standard deviation is 5.

A: We have to find z score for 120 when mean is 100 and standard deviation is 5.

Q: 10. A student from region A scored 400 on a standardized math test with a mean of 350 and a standard…

A: Given that.   X~N( μ , ?^2 )   Z-score =( x - μ )/?

Q: An exam score has a mean of 78 and a standard deviation of 9. What is the Z-score for an exam score…

A: GivenMean(μ)=78standard deviation(σ)=9

Q: At one point the average Price of regular unleaded gasoline was $3.38 per gallon. Assume that the…

A:

Q: A Physics test has a mean of 150 and a standard deviation of 12.  A Geography test has a mean of 46…

A: Solution: Let X be the physics test and Y be the geography test. From the given information, X has…

Q: On a final examination in Mathematics, the mean was 76 and the standard deviation was 5. Determine…

A:

Q: The results of a common standa population mean is 105 and the standard deviation is 30. A subject…

A: A z-score is a numerical measurement that describes a value's relationship to the mean of a group of…

Q: 2. Suppose the chamber of commerce at Pyramid Lake advertises that the average length of trout…

A: Solution: 2. State the hypotheses. Null hypothesis: That is, the average length of the trout caught…

Q: Is a measure of 29 inches "far away" from a mean of 19 inches? As someone with knowledge of…

A: The number of standard deviation 29 inchs far away from the mean is: Thus, 29 inches is 5 standard…

Q: About what percent of x values lie between the first and second standard deviations from the mean…

A:

Q: B. According to a factory employer, the mean working time of workers in the factory is 6 hours with…

A: Hi! Thanks for posting the question. Since there are more than one question we will answer the…

Q: An economist wants to find out if there is difference in the monthly expenses of families from…

A: There are two independent samples which are Makati and Quezon City. We have to find the computed…

Q: Which score has a better relative position: a score of 65 on an exam with a mean of 80 and a…

A: Given:  For the score 65  mean, μ =80 and standard deviation, σ =14 For the score 69 mean, μ =82 and…

Q: Which is better and corresponds to the higher relative position, a score of 92 on a test with a mean…

A: Solution:From the given information, score of 92 on a test with standard deviation of 15 and mean of…