After giving grade to a quiz in M233, Engr.Cruz announced to the class the mean score was 68 points with the standard deviation of 12 points. However, a student brought to his attention that one of the questions in the quiz was incorrect and impossible to solve. As a result, Engr.Cruz agreed to add 10 points to the score of each student. Find the mean, the variance and the standard deviation of the new set of scores.

Q: Determine whether the data described below are qualitative or quantitative and explain why The…

A:

Q: curve within the given intervals. Identify and shade the region to find the standardized (Z) value.…

A: Given data Here we have to find out the areas under the normal curve within the given intervals .…

Q: Check here for instructional material to complete this problem. Evaluate the following formula for…

A: It is given that, μ1 – μ2 = 0.

Q: Evaluate the following formula for p₁=0.9, p₂ = 0.1, P₁ P₂ = 0, P=0.374695, q=0.625305, n₁ = 46, and…

A: Given that: Sample proportions are: p^1=0.9p^2=0.1 Difference in population proportion: p1-p2=0…

Q: A home antigen test for the SARS-COV-2 infection has a sensitivity of 50% and specificity of 97%.…

A: given data sensitivity = 50 % specificity = 97%

Q: Determine whether the following graph can represent Q Could the graph represent a normal curve?…

A: We want to tell you which option are correct choice.

Q: The ponderal index is a measure of overall size similar to a body mass index. The ponderal index of…

A:

Q: A researcher wants to examine the relationship between social class and number of books read in a…

A: In the given situation, The Pearson's r value is 0.73.Here, the correlation value is positive. That…

Q: A botanist grew 24 pepper plants on the same greenhouse bench. After 21 days, she measured the total…

A: The given data is 9.8, 10.1, 10.9, 11.3, 11.8, 11.9, 12.0, 12.0, 12.1, 12.2, 12.2, 12.3, 12.5, 12.6,…

Q: Evaluate p = X₁ + X2 n₁ + n₂ for x₁ = 37, x₂ = 28, n₁ = 100, and n₂ = 56. p= = 0.41 (Round to four…

A:

Q: The probability distribution of a r.v. X is: f(x) = k sin TX 0 < x < 5. Determine the constant k and…

A: f(x)=ksin(πx/5) 0≤x≤5

Q: bution with a mean of 2.4 kg/m and a standard deviation of 0.45 kg/m°. Enter the R code that can be…

A: Given that  Mean = 2.4 , Standard deviation = 0.45

Q: Read and Understand Suppose I want to see if, overall, this class is improving in their…

A: The objective is to define the appropriate nature of the test statistic that is to be formulated for…

Q: Winning team data were collected for teams in different sports, with the results given in the…

A: Let Xi = Denotes the home / visitor Yi = denotes the Sports.

Q: A recent study of 28 employees of XYZ company showed that the mean of the distance they traveled to…

A: To find: The upper bound of the 95% confidence interval of the true mean

Q: Which of the following is NOT a measure of centrality?   Mean   Median   Mode   Mean Absolute…

A: Given information- We have given Mean, median, mode, and Mean Absolute Deviation. We have to define…

Q: Use the data set "longley" in R to answer the following questions Read the data set "longley" in R…

A: The objective is to read the dataset "longley" in R.

Q: 1) The below diagram shows two jugs that are similar. The volume of the smaller jug Is 0.8L. What is…

A: Basic concept of probability are used to solve the given problem Given, cost of 160 mm…

Q: If and . Calculate P(A) = 0.4 P (B) = 0.3, P(An B) = 0.1 P(A|B) Enter your answer with two decimal…

A:

Q: A frequent flyer was interested in the relationship between dollars spent on flying and the distance…

A: given data n = 20 y = distance flow in miles x = money spent in $

Q: Researchers asked each child in a sample of 411 school-age children if they were more or less likely…

A:

Q: A sample of size n=92 is drawn from a normal population whose standard deviation is a = 7.6. The…

A: given data n = 92 σ = 7.6x = 44.16

Q: Verify that the 5 year weighted moving average weight 1, 2, 2, 1 respectively is equivalent to 4…

A: To verify: the 5 year weighted moving average weight 1, 2, 2, 1 respectively is equivalent to 4 year…

Q: A pharmaceutical company wishes to evaluate the effect of the amount of starch on the hardness of…

A: Given Information: Consider the given dataset: Percentage of starch Hardness 2 4.3 4 4.8 4.6…

Q: 12.2 12.2 12.5 13.2 13.2 13.5 What terms can be used to classify the variable of interest in this…

A: It is given that a botanist grew 24 pepper plants on the same greenhouse bench.

Q: True or False: the normal quantile plot shown provides evidence that the data are NOT from a normal…

A: Concept: Q-Q plot are used to identify where the data given is normal or not

Q: According to Masterfoods, the company that manufactures M&M's, 12% of peanut M&M's are brown, 15%…

A:

Q: Listed below are altitudes (thousands of feet) and outside air temperatures (°F) recorded during a…

A: For the given data We have to calculate unexplained variation.

Q: myopia (hearsightedness) in adults over age 40 is 27% in the US. Suppose eight adults over age 40…

A: Given that  p = 27% = 0.27 , n = 8 Y ~ Binomial (n = 8 , p = 0.27)

Q: F H K 95% Confidence Interval for Average Age of Online College Students: e Mean: e St. Dev: ple…

A: In above scenario we have to construct confidence interval for one population mean  The formula for…

Q: Estimate the mean score from the frequency distribution below. Round to 1 decimal place Score 61-70…

A: Given: Class Frequency 61 - 70 2 71 - 80 4 81 - 90 5 91 - 100 1 To find mean score…

Q: In a large population, 59 % of the people have been vaccinated. If 5 people are randomly selected,…

A: given data p(vaccinated) = 0.59 ∴n(not vaccinated) = 1 - 0.59 = 0.41select  5 people at…

Q: The percentage of citizens who have trust in newspapers declined approximately linearly from 35% in…

A: Answer: From the given data, The percentage of citizens who have trust in newspapers in 2003 = 35%…

Q: Determine the area under the standard normal curve that lies between (a) Z= -1.53 and Z= 1.53, (b)…

A: We will use Excel to determine the area under the normal curve.

Q: Biochemical oxygen demand (BOD) measures organic pollutants in water by measuring the amount of…

A: Y= mX+C m=slope C= y- intercept   Here relationship between BOD and TOD BOD = -55.48 + 1.506 TOC…

Q: empirical rule to determine the following. (a) What percentage of people has an IQ score between 60…

A: It is give that  Mean, μ = 100 Standard deviation, σ = 20

Q: e following table shows students' test scores on the first two tests Answer First test, x ©2022…

A: We have given that,  The data set are :- X :- 59, 59, 65, 93, 57, 71, 47, 66, 84, 70, 76, 78 Y:- 71,…

Q: The table summarizes results from pedestrian deaths that were caused by automobile accidents.…

A: driver intoxicated   predestrain intoxicated     yes no total yes 54 66 120 no 282 528 810…

Q: The math professor gave the class a set of 12 review problems and told them that the midterm exam…

A: Given: 6 problems chosen out of 12 Mela has memorized 8 of them

Q: A box contains 2" tickets among which "C; tickets bear the number i; i = 0, 1, 2, ..., n. A group of…

A: Given that

Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…

A: Given: Mean=1487 standard deviation=307

Q: The following table is of profit, revenue, and number of employees of 10 companies. Profit US $…

A: The question is about measures Given :   To find : a ) The mean profit per company b ) The overall…

Q: Using the following stem & leaf plot, find the five number summary for the data. 1|0 2 2|3 4 4 3|1…

A: Stem and leaf plot data given 1|0 22|3 4 43|14|2 2 7 95|0 4 8 8 8 96|0 8

Q: (A) The value "df" stands for derivatives of freedom (B) These values give an idea how "warped"…

A: Given two statements: (A) The value "df" stands for derivatives of freedom(B) These values give an…

Q: It is known that in a series of collector's cards there is an average of one in 180 cards of rarer…

A: Introduction: Denote Denote X as the number of rarer value cards obtained in a sample.

Q: In a class of 15 students there are 5 boys and 10 girls If a committee of 6 students is…

A:

Q: Evaluate the following formula for x₁ = 97.68, X₂ = 97.28, H₁ - H₂=0,0₁ = 0.79, 0₂ = 0.66, n₁ = 18,…

A: Given that, The formula for calculating the z-test statistic is,

Q: Ten coins are thrown simultaneously. Find the probability of getting at least seven heads.

A:

Q: Which type of t-test is best for the following variables:(a) Age measured by # of years old (b) Life…

A: It is given that There are two variables :  Age by number of years old, Life satisfaction on likert…

Q: (b) Professor Watson has an average value of Beauty, while Professor Stock's value of Beauty is one…

A: Introduction: It is required to predict course evaluations (COURSE_EVAL) of Professor Stock and…