A 77. A professor gives an easy test worth 100 points. The mean is 94, and the standard deviation is 5. Is it possible to apply a normal distribution to this situation? Why or why not?
Q: 29. The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what…
A: Since you have posted more than one question, we are answering the first question as per our rule.…
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A: Given: A distribution of values is normal with μ=123.2 , σ=62
Q: On a recent quiz, the class mean of 74 with the standard deviation of 3.9.  calculate the z-score…
A: Given data μ = 74σ = 3.9x1 = 95x2 = 70
Q: What is the corresponding Z- score, mean is 110, standard deviation is 8 and x is 90
A: In question, We'll find the Z - score for mean 110, standard deviation 8 and x = 90. The solution is…
Q: Consider a value to be significantly low if its z score less than or equal to -2 or consider a value…
A: Given: Mean μ=19.8 Standard deviation σ=5.2 If z≤-2, lowz≥2, high
Q: Consider a value to be significantly low if its z score less than or equal to - 2 or consider a…
A: The formula of z score is: z=x-uσ The values less than or equal to -2 can be considered as…
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A: Given : No. of students : Sample size (n) = 1000 Let X : Scores in aptitude test in mathematics…
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A: total point distribution follows normal with mean = 530 and standard deviation =80 to find % of…
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A: Let , X be the lengths of a commercially caught fish with mean μ=25 cm and standard deviation σ=5 cm…
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A: It is given that the mean test score is 21.5 with standard deviation of 5.1. It is given that the…
Q: JaJuan want to estimate the average student GPA at his high school. He surveys 37 students and finds…
A: Given,sample size(n)=37sample mean(x¯)=3.33population standard deviation (σ)=0.29
Q: Average words in a romance novel is 64,253 and the standard deviation is 17,467 assuming the…
A: μ = 64253σ = 17467
Q: The department of public safety has an old memo stating that the number of accidents per week at a…
A: From the provided information, Sample size (n) = 52 Sample mean (x̅) = 2 Population standard…
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A: Here Given For normal curve
Q: Adding 10 points to every score in a distribution will not change the value of the standard…
A: To add 10 numbers to every score in a distribution will not change the value of the standard…
Q: A distribution of N = 10 scores has μ = 50 and σ = 10. If another five individuals, all with scores…
A: Given Data: N=10 μ = 50 σ = 10 Five individual all with scores X=50 are added
Q: The mean of a test is 400 and the standard deviation is 75. It is normally distributed. A sample of…
A: 1] Mean μ=400 2] standard deviation σ=75 3] n=25 4] μx¯=400σx¯=σn=7525=15
Q: A certain standardized tests math scores have a bell shaped distribution with a mean of 525 and a…
A: GivenMean(μ)=525standard deviation(σ)=105
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A:
Q: A recent survey of 200 people revealed that the mean time spent in watching television of teenagers…
A: We want to test that mean time spent in watching television of teenagers is differ from 3.8 hours.…
Q: Consider a value to be significantly low if its z score less than or equal to -2 or consider a value…
A: Here, mean is 19.5 and standard deviation is 4.6.
Q: The distribution of scores is approximately normal with a mean of 31 and a standard deviation of 5.…
A:
Q: facing a shortage the student activity council decides to reduce funding for each of it's student…
A: Given : facing a shortage the student activity council decides to reduce funding for each of it's…
Q: Using the simplified version of the normal distribution, what percentage of the cases falls within 2…
A: It is given, A normal distribution with 2 standard deviation.
Q: A distribution of values is normal with a mean of 187.9 and a standard deviation of 71.2. Find P80,…
A:
Q: A reading specialist wants to identify 3rd graders who scored the lowest 5% on a standardized test.…
A: From the provided information, Mean (µ) = 100 Standard deviation (σ) = 10
Q: ly normal and has a standard deviation of 88% of students scored above a 800. What is the mean of
A: The mean of the binomial random variable obtained by the formula μ=np, where (n) is the number of…
Q: Consider a value to be significantly low if its z score less than or equal to -2 or consider a value…
A: Given Mean, μ=20.5SD, σ=5.4
Q: The mean IQ is 100 and the standard deviation is 15. What percentage of people fall between the IQs…
A: given data, μ=100σ=15we have to find out the percentage of people
Q: The MF exam has a population mean of 500 and a standard deviation of 200. What are the scores for…
A: Let X=MF exam scores We have given information, The population mean μ=500 And population standard…
Q: On average, Americans have lived in 2 places by the time they are 18 years old. Is this average less…
A: Given Mean=2 x-bar=1.99 Standard deviations=0.3 n=62
Q: A mandatory competency test for high school sophomores has a normal distribution with a mean of 410…
A:
Q: 3. A taxi company claims that its drivers have an average of at least 12.4 years' experience. In a…
A: Givensample size(n)=15Mean(x)=11.2standard deviation(s)=2α=0.10
Q: Consider a value to be significantly low if its z score less than or equal to -2 or consider a value…
A:
Q: The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?
A:
Q: The scores of 800 students in a 100-item exam resemble a normal distribution with a mean of 78 and a…
A: Let X be the random variable from Normal distribution with mean (µ) = 78, standard deviation (σ) = 8…
Q: A test is used to assess readiness for college. In a recent year, the mean test score was 19.2 and…
A: Given data: Mean test score, μ=19.2. Standard deviation, σ=4.5. A value is considered to be…
Q: Čonsider a value to be significantly low if its z score less than or equal to - 2 or consider a…
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- Someone claims that the systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 125. The population standard deviation is 18. A random sample of 45 adults having systolic blood pressure of 160. Find the test statistic. Z = (Round to one decimal)Help!Average is 16.7, standard deviation is 3.6, what's x only 14% lower than?
- Type if A if you should accept the study as having a mean not to different from the population mean. Type R if you should reject the study as having a too different mean from the population mean. A researcher wants to determine whether the mean height of 31, 18 year old Filipino teens is significantly different from the population average of 5.2 ft. The mean and the standard deviation of the scores of the researcher's study is 5.4 ft and 7; respectively. Assume a 99% confidence level. A researcher wants to determine whether the mean lifespan of 16 pet goldfish living in the same tank is significantly different from the population average of 12 years. The mean and the standard deviation of the pet goldfish's lifespan is 9.5 and 11; respectively. Assume a 90% confidence level.Consider a value to be significantly low if its z score less than or equal to -2 or consider a value to be significantly high if its z score is greater than or equal to 2. A test is used to assess readiness for college. In a recent year, the mean test score was 20.2 and the standard deviation was 4.9. Identify the test scores that are significantly low or significantly high. What test scores are significantly low? Select the correct answer below and fill in the answer box(es) to complete your choice. (Round to one decimal place as needed.) OA. Test scores that are greater than OB. Test scores that are between OC. Test scores that are less than and (Round to one decimal place as needed. Use ascending order.) (Round to one decimal place as needed.) Select the correct answer below and fill in the answer box(es) to complete your choice. What test scores are significantly high? OA. Test scores that are less than OB. Test scores that are greater than OC. Test scores that are between and…A distribution of values is normal with a mean of 116.2 and a standard deviation of 60.1. Find P43, which is the score separating the bottom 43% from the top 57%. P43 = Enter your answer as a number accurate to 4 decimal places.
- The mean score for first exam in your first organic chemistry class (section A) was 60, with a standard deviation of 5. Your score on the exam was 70. A. How many standard deviations above the mean is your score?Consider a value to be significantly low if its z score less than or equal to - 2 or consider a value to be significantly high if its z score is greater than or equal to 2. A test is used to assess readiness for college. In a recent year, the mean test score was 21.8 and the standard deviation was 4.6. Identify the test scores that are significantly low or significantly high. What test scores are significantly low? Select the correct answer below and fill in the answer box(es) to complete your choice. O A. Test scores that are greater than (Round to one decimal place as needed.) O B. Test scores that are less than (Round to one decimal place as needed.) O C. Test scores that are between and (Round to one decimal place as needed. Use ascending order.)The average exam score of a math exam was 70 points and the standard deviation was 5 points. The professor gave a 10% curve plus 5 points extra credit to all students. What is the new standard deviation? 10.5 points 5.5 points None of the other choices is correct 30.25 points
- A distribution of values is normal with a mean of 246.2 and a standard deviation of 99.5. Find P78, which is the score separating the bottom 78% from the top 22%. P78 Enter your answer as a number accurate to 4 decimal places.Exam scores in a biology class have a normal distribution with a mean of 84 and a standard deviation of 17.4. Would it be unusual for a student to score 120 on this exam? Justify your answer.