Exam scores have a normal distribution, with Mean of 70 and Standard deviation of 10. Bob’s score was 80. Find and interpret his standard score.

Q: The scores on the board are Normally distributed with a mean of 67 and a standard deviation of 13.…

A: From the provided information,X~N (67, 13)The bottom 5% of students will fail.

Q: A set of 10 scores has a standard deviation of 8. What is the sum of squares?

A: Given,Number of scores = 10Standard deviation = 8Using formulas,For population, For sample,

Q: The mean IQ of 500 data science students is 151  and the standard deviation is 15. Assuming that the…

A:

Q: If the average weight for cats is 12 pounds and the standard deviation is 2 pounds. 95 percent of…

A: Given data:  average weight for cats = 12 pounds standard deviation = 2 pounds. To find: 95 % of all…

Q: A data set is normally distributed with a mean of 67 and a standard deviation of 12. What percent of…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

Q: Compare the scores: a score of 220 on a test with a mean of 200 and a standard deviation of 21 and a…

A:

Q: The class mean for the exam was 82 with a standard deviation of 6.  There are 37 students in the…

A: We have given that, Mean = 82 , standard deviation σ = 6  sample size n = 37   Standard error of the…

Q: lves have a mean  weight of 100 pounds, with a standard deviation of 24 pounds. Find the weight…

A: Find the weight range for the central 82% of the wolves.

Q: Keenan scored 80 points on an exam that had a mean score of 77 points and a standard deviation of…

A:

Q: A researcher measures the amount of food consumed by each dog in her lab. She finds that the mean…

A: It is given that mean amount of food is 12 oz and number of dogs is 16. The sum of squared…

Q: Scores on a test have a mean of 86 and a standard deviation of 13. Jerrica has a score of 94.…

A:

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: A set of data has a normal distribution with a mean of 100 and a standard deviation of 15. Find the…

A: First we reduce the given normal distribution to the standard normal distribution using the formula…

Q: he cost of laptops is normally distributed with a mean of $750 and a standard deviation of $60. What…

A: GivenMean(μ)=750standard deviation(σ)=60

Q: scores are normally distributed with mean 500 and standard deviation 100. Julie scores 650. Her…

A: Consider X be the random variable representing the SAT scores. X follows normal distribution with…

Q: The distribution of the height of a tomato plant is normal with population mean u and population…

A: Given, σ=10Let μ=μP(Z≤z)=0.40From z-tableP(z≤0.253)=0.40

Q: How many minutes did it take him to finish the face?

A: It is given that the distribution of finishing time for men was approximately normal with mean 242…

Q: The distribution of the weights of dogs at a local rescue shelter is Normal, with a mean of 38…

A:

Q: A class has a average height of 68 inches and a standard deviation of 2 inches. What percent of the…

A: Let x be the height which follows normal distribution with mean 68, and standard deviation 2. The…

Q: THe distribution of cholesterol levels in teenage boys is approximately normal with a mean of 170…

A: Given The distribution of cholesterol levels in teenage boys is approximately normal with a mean of…

Q: he average height for a man in California was 177 cm in 2021. If height follows a normal…

A: given data, normal distribution, μ=177σ=10p(180<X<190)=?

Q: In a standardized exam the mean score is 400 with a standard deviation of 50. Assume the scores…

A: Solution

Q: her wishes to give A’s to the top 8% of the students and F’s to the bottom 8%. The next 10% will be…

A: given: mean(μ)=78 sd(σ)=8

Q: The mean of a test score was 21.2 and the standard deviation was 5.1 . Identify the rest scores that…

A: Given Data Mean µ= 21.2. Standard Deviation σ= 5.1. Assuming that the given data is obtained from a…

Q: An organizational psychologist wants to know if attending a training session increases the…

A:

Q: The final exam is worth 200 points with the usual 10% grading scale. Assume that the final exam…

A: Given Information: Mean (u) = 161 points Standard deviation (s) = 22

Q: Draw two normal curves that have the same mean but different standard deviations. Describe the…

A:

Q: The mean height of a basketball team is 6 feet with a standard deviation of 0.2 feet. The team's…

A:

Q: The mean score of the students on pre-assessments is 10 and the standard deviation is 2. What was…

A:

Q: The scores on a test are normally distributed, with a mean of 82 and standard deviation of 5. What…

A: Let  X be the random variable from normal distribution with mean (μ) = 82 and standard deviation (σ)…

Q: Americans (on average) individually eat 16 pounds of seafood each year with a standard deviation of…

A: Given that   x̄ = 14 , μ = 16 , ? = 7 , n = 4

Q: Pattys final exams have an average of 78 and a standard deviation of 6.  If she wants 4% of her…

A: X follows a Normal distribution with mean = 78 and S.D = 6 Then z=(x-mean)/SD = (x-78)/6  follows…

Q: The mean of a data ser is 70. The standard deviation is 2. Between what Value is 95% of data found…

A:

Q: a quantitative data set has mean 25 and standard deviation 2. approximately what percentage of the…

A: The given data is as follows:Population mean, Population standard deviation,

Q: Suppose that the average score for the first exam was 70 with a standard deviation of 8.  State each…

A: Given that  Mean = M = 70, Standard deviation =Sd = 8

Q: Many students did an exam, the mean was 15 and the standard deviation was 32 The highest mark was…

A: Given Mean μ=15, standard deviation σ=32  X=103

Q: The average age of senators in the 108th Congress was 62 years. If the standard deviation was 12.5…

A: Solution: Let X be the age of senator. From the given information,

Q: standardized test has a pop. mean of 152 and a standard deviation of 16. Jenny has a score of 143.…

A: Given that Mean=M=152, Standard Deviation=Sd=16, Jenny score=X=143

Q: Jack had an average score of 75 with a standard deviation of 3. Mikes z-score was 1.85. His actual…

A: We have given that,  X be the random variable from normal distribution with mean Or average score…

Q: A pediatric surgeon in a hospital carried out a survey on heart rate of the new born baby. The mean…

A: GIven data,μ=94σ=7.5P(79<X<109)=?