Kevin scored at the 60th percentile on a test given to 9780 students. How many students scored lower than Kevin?

Q: if a test is weighted at 25% and I make a 55 on the test with my current grade being a 82, would is…

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Q: Al gave correct answers to 47 of the 50 questions on the driving test . What percentage of the…

A: We can give the correct answer in the below st

Q: SOLVE FOR THE FOLLOWING with complete solution:  1, 2, 2,  3, 4, 4, 5, 6, 7, 8, 8, 9, 11, 13, 15,…

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Q: In order to have a margin of error of 2%, people should be surveyed.

A: we are given that 24% people consider summer as their favourite season (p) = 0.24 to find  number of…

Q: mple in an amusement park showed an average expenditure of $10.30 for the evening. The average…

A: In this question, the concept of average is applied. Average The arithmetic mean is the ratio of the…

Q: If the class has 670 points in total, how much I need to pass with the 70%?

A: Formula to calculate the percentage (%) value defined as shown below…

Q: Illustration 17.5. Find the chance of getting 3 successes in 5 trials when the chance of getting a…

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Q: the average score of 10 students is 85. what will be the mean if another student will take the test…

A: From the provided information, Average score of 10 students = 85

Q: 00 subjects were studied and 120 of them expressed a preference for brand x, what percentage…

A: The 200 subjects were studied; n=200 120 of them expressed a preference for brand x; x=120

Q: if i have a 73.8 average in math, and I get a 30% mark in my last test, what we

A: Introduction: a number obtained by multiplying two or more quantities and then dividing the total by…

Q: Alex is 80th in his class of 320 students. What is his percentile rank in class?

A: Data given p=80, n=320

Q: According to recent data, 33% of people are left handed. In a sample of 200 people, how many would…

A: Answer: From the given data, Let X: Left handed people Sample size (n) = 200 P(left handed people) =…

Q: What is the probability a woman has breast cancer given that she just had a positive test?

A: Given,  1% women have breast cancer 85% chance of having breast cancer and test positive(true…

Q: A survey of 150 people revealed that 115 people like ketchup on their hot dogs, 85 people like…

A: Concept of General Addition Rule: For any two events A and B the General Addition Rule state that:

Q: A student gets 9 out of 15 problems correct on a homework assignment. What percent of the assignment…

A: The objective of this question is to find out the percentage of the assignment that the student got…

Q: Of the 328 patients that completed the survey last year, 211 of them claimed to be returning…

A: Given: 328 patients completed the survey 211 patients returning

Q: Eight hundred student took a 90-point standardized examination. After the examination, the students…

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Q: (papaau se segpid se technology to calculate the P-value. P-value = (Round to four decimal places as…

A: Given that  Sample sizes for country C and Country D is n1=1024 , n2=1078 Level of significance…

Q: A group of students start a walking club. Each student recorded their walking time in April 2022 as…

A: We know that,  Mean = ΣXi/n where ΣXi is the sum of all the terms and n is the sample size.  Here…

Q: A student's statistics test is 18 questions and worth 30% of their overall grade. The student is…

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Q: You survey 100 people and find that 75 of them would prefer to work at home to some extent. When…

A: Given: You survey 100 people and find that 75 of them would prefer to work at home to some extent.…

Q: "Save today by switching to SOAR!" is the slogan for SOAR, a cell phone service provider. Logan…

A: Farmula used Standard error=σ/√n Given  n=75, x̄=sample mean=$19.03, standard deviations=σ=$4.71

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: Maryam scored an 8 out of 10 on her spelling test one week. The next week, her score decreased by…

A: The objective of this question is to find out Maryam's score for the second week after it decreased…

Q: If 75% of x is 1500 then x is

A: Given ,  75% of x is 1500 then  We have to find x  We know that ,  75% of x is 1500 means

Q: The scores on a statewide chemistry exam were normally distributed with ?=73.08 and ?=6. Gabriela…

A: Given data isMean(μ)=73.08standard deviation(σ)=6

Q: Complete the following statements. In general, % of the values in a data set lie at or below the…

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Q: Jose has scored  79 ,  84 , and  85  on his previous three tests. What score does he need on…

A: Step 1:. The formula for average is:Average=Number of scoresSum of all scores​ Let's apply this…

Q: The average of Molly's 5 quiz scores is 9.0.If her highest test score is dropped , her average is…

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Q: Cricket’s is a popular club for students from the nearby college. The club had 840 customers during…

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Q: 22 Legacy boys and 19 Legacy girls play flag football. 30 Legacy boys and 32 Legacy girls…

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Q: ege students are foreign students the students at this university are foreign? %

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Q: According to recent data, 12 percent of people are left handed. In a sample of 20 people, how many…

A: Answer: Using the given data, Let X denotes the number of people who are left handed P(left handed)…

Q: Nygel answer 11 out of 12 test questions correctly. What percent of his test questions did he answer…

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Q: What percentage of the blocks are red?

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Q: The data show the chest size and weight of several bears. Find the regression equation, letting…

A: For the given data Find the regression equation The best predicted weight for a bear with a chest…

Inverse Normal Distribution

The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.

Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.