1. In Spring 20016, David took 3 courses and got the following scores: 87, 68, 91. What is David's average score in those courses taken in Spring 2016? OA 76 OB. 2 Oca OD.81

Q: A random sample of 105 students of University A showed that 12 were in favour of a new grading…

A: Given: Sample size (n1)=105Sample size (n2)=108x1=12x2=18α=0.01

Q: One sample has a mean of M=6, and a second has a mean of M=12. The  two  samples are  combined into…

A:

Q: One sample has n = 6 and M = 10. A second sample has n = 4 scores with M = 15. If the two samples…

A: Combined mean = n1x1¯+n2x2¯n1+n2

Q: A hot topic of debate is whether the legal driving age should be raised to eighteen. From a random…

A: It is tested whether majority of the Americans believe the legal driving age should be raised to 18.…

Q: 7. What is the value of SSx? (SHOU

A: We have to calculate the SSx for the correlation study.

Q: Does this statement make sense or not? our study measured the birth weights and incidents of…

A: Here we want to Know that the given statement make sense or not.

Q: 3. In a Gallup Pool, 52% of 1038 surveyed adults said that second hand smoke is "very harmful". What…

A: Following information is given:   Total number of people survey = 1038 Percentage of people who said…

Q: Anna is 3 years old and in the 42nd percentile for height in her age group. What does this mean?…

A: Given: 1)Anna is 3 years old and, 2) In the 42nd percentile for height in her age group. In the…

Q: The department of motor vehicles wants to check whether drivers have a slower reaction time after…

A: a) 95% confidence interval was calculated to be (-12.05, -9.95): There is 95% confident that the…

Q: What is the relative frequency of the class 70.0 - 71.4?

A: The relative frequency is defined as Relative frequency = Frequency/Total

Q: 1. Suppose you have a 88 on your daily assignments, 94 on your major tests, and a 80 on your final.…

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Q: What percentage of scores would be above 567?

A:

Q: 1) what proportion of students scored above student 33 on homework 3? 2) what proportion of students…

A: Given:   Student ID HW 1 HW 2 HW 3 1 98 93 99 2 81 80 64 3 66 91 75.5 4 84 94 80 5 65…

Q: If I have a sample of people’s ages, and the IQR is 20, what does this mean?

A: Given:  IQR for sample of people's ages is 20.

Q: After taking a series of 4 classroom examinations, John obtained a mean score of 82. How much score…

A: Mean is a part of measures of central tendency.

Q: What is the mean for the combined set if both of the original samples have n = 4 scores? What is the…

A: Given that For sample 1, mean M1 = 8 For sample 2, mean M2 = 16

Q: 9. At a 1% level of significance, does college academic grade depend on the high school SAT result…

A: Given:   SAT   Acad. Grade Low Average High Total Low 13 25 21 59 Average 18 31 38 87…

Q: If your grade for your AMDM class is computed the following way: Homework – 10% Quizzes – 10% Tests…

A:

Q: A man has an adopted grandson. After examining him at his 2-year checkup, the boy's pediatrician…

A: For a variable, X~N(μ,σ2), the z-score is, Z=X-μσwhereμ=population meanσ=population standard…

Q: In a survey of 1150 adult males, 805 said they use the Internet. In a survey of 1050 females, 746…

A: There are two dependent variables which are males and females. The independent variable is using of…

Q: In 2007, the CDC reported that approximately 6.6 per 1000 (0.66%) children were affected with autism…

A:

Q: The relative risk of developing lung cancer among individuals who smoke is 15.0. Which of the…

A: Relative risk is the ratio of probability of an outcome in an exposed group to the probability of an…

Q: What percentage of Births occurred among women between the ages of 40 and 42?

A: From the given table we have Total number of births = sum of all observation…

Q: 13. Does the last column of percentages in the table add up to 100%?Check the researchers'…

A: 13. The last column of percentages is given as: % 20.6 5.9 12.4 18.3 14.4 11.1 9.5…

Q: - Suppose the Department of Energy in the Philippines surveyed 200 gasoline stations to determine…

A: a)In the given case, gasoline at all the gas stations is the population whereas the gas stations…

Q: What does Tukey’s test supplies?

A:

Q: One sample of n = 4 scores has a mean of M = 12, and a second smaple with n = 6 scores has a mean of…

A:

Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

A: # Given: no of favourable cases x=321    total no of cases n=1432  then to find sample proportion…

Q: If in a discrete data, 75% of the values are less than 30, then......?

A: we know that,  If Q1 is first quartile then we can say that 25% data points are below Q1. If Q2 is…

Q: One sample has a mean of M = 6 and a second sample has a mean of M = 12. The two samples are…

A: Given information- We have given means of two samples. M1 = 6 M2 = 12 We have to find the mean for…

Q: As the newly hired manager of a company that provides cell phone service, you want to determine the…

A: When we don't have any prior information about the population proportion, we generally take it as…

Q: A sample of n = 64 scores is selected from a population with µ = 80 and with σ = 24. On average, how…

A: Given A sample of n = 64 scores is selected from a population with µ = 80 and with σ = 24. On…

Q: A sobriety test is 96% accurate. Suppose 2500 drivers were pulled over on suspicion ofintoxication,…

A: Given that the sobriety test is 96% accurate, 2500 drivers were pulled over on suspicion of…

Q: Determine the test score of John in Statistics if he has a z-score of 1.89. (SD = 4, mean = 82)

A:

Q: A sample of n = 64 scores is selected from a population with µ = 80 and with σ = 24. On average, how…

A: Givenn=64μ=80σ=24

Q: 2.) Suppose you scored 75, 64, and 79 on your first 3 math tests. a.) What is your current average?

A: We are given scores of 3 math tests which are 75, 64, and 79 We need find the current average of…

Q: How many levels were used in the experiment?

A: Given information: Variable of interest=Effect of C2F6 flow rate on the uniformity of the etch on a…

Q: B. The average exam score for 10 students in a statistics class was 85. One student dropped the…

A: Given When n=10, average exam score for 10 students in a statistics x̄=85  When one student dropped…

Q: A population with a mean of 8 has a sum of 40. How many scores are in the population?

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Q: For the month of April a checking account has a balance of $564 for 23 days, &2466 for 3 days, and…

A:

Q: e. What is the highest personal messaging frequency among the bottom 20% of employees in terms of…

A: We have to find the values for normal distribution using CLT.

Q: The science club collected bottles for every class in Grade 6 for fund raising project. Section a…

A: The formula for average is Average=Sum of observationsNo. of observations. It is given that section…

Q: A small-town mechanic says that 8% his customers come in for an oil change. When  1000 samples were…

A: It is given that a small-town mechanic says that 8% of his customers come in for an oil change.

Q: Determine the test score of John in Statistics if he has a z-score of 1.9. (SD = 4, mean = 85)

A: Given that in statistics, John has z-score of 1.9 where mean score is 85 and SD is 4. Here, to find…

Q: The mean weight of 15 wrestlers is 110 kgs. The mean weight of 5 of them is 100 kgs and another 5 is…

A: Given that, the mean weight of 15 wrestlers is 110 kgs. The mean weight of 5 of them is 100 kgs and…

Q: 4. Suppose that only 10 students in Nabatieh campus had taken the midterm. Which of the following…

A: We know that, here  n= 10 (even) So median=(n/2 +(n/2+1)th term)/2 = (5th +6th term)/2

Q: A nursing school professor is interested in determining how her college students compare to the…

A: Let X denote the exam score, then assuming that X is normally distributed with mean, µ = 100 and a…

Q: The results of a recent study show that the proportion of people in the western United States who…

A: There are two hypothesis 1 null hypothesis H0 in which we support that the given claim is correct 2…

Q: One sample has a mean of M=8 and a second samplehas a mean of M=16. The 2 samples are combined into…

A: Given data M1 = 8 M2 = 16 n1 = 3 n2 = 5