Questions 3a through 3d are based on a distribution of scores with x= 75 and the standard deviation = 6.38. Draw a small picture to help you see what is required.   What is the probability of a score falling between a raw score of 70 and 80? What is the probability of a score falling above a raw score of 80? What is the probability of a score falling between a raw score of 81 and 83?

Q: In a departamental examination in  statistics given to 500 students, the mean score was 75 with a…

A: A z score tells us where score is lies on normal distribution curve. if z score is is zero is it…

Q: In a sample of 152 people the average score was 74 with a standard deviation of 6. What is the…

A: Sample size = n = 152   Mean = 74  Standard deviation = 6

Q: A class of 30 62.171 students took a quiz worth 50 points. The standard deviation of the scores was…

A: Standard deviation of sample is given by

Q: or a distribution, the mean is 100 and the standard deviation is 4.  If a data value x has a value…

A: Given data,Mean μ=100sd σ=4If x=90z=?

Q: The partial pressure of oxygen, PaO2, is a measure of the amount of oxygen in th blood. Assume that…

A: From the given information, μ=38σ=9 Here, the readings follows normal distribution. A. The PaO2…

Q: Need asap   For a medical study, a researcher wishes to select people in the middle 75% of the…

A:

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: statistics professor reported that the mean score in a recent quiz is 72 and the standard deviation…

A: Solution

Q: The scores at a golf course recorded last year followed a normal distribution with mean 78 and…

A:

Q: Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard…

A:

Q: 500 freshmen at Crescent High School took an algebra test. The scores were distributed normally with…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: The ACT math scores of a particular high school in New Jersey are approximately normally…

A: According to the empirical rule of normal distribution, in a normally distributed data set 68%, 95%,…

Q: What is the Z value for a value of X = 60?

A:

Q: 4. A car salesperson notes that she sells either 1, 2, 3, 4, 5 or 6 cars per week with equal…

A:

Q: Joey and Dee Dee bowled five games at the Rock 'n' Bowl Lanes. Their scores are given in the…

A: Standard deviation is a measure of dispersion. For a set of n observations, x1, x2, ... , xn…

Q: There are two major tests of readiness for college, the ACT and the SAT. ACT scores are reported on…

A: From the provided information, For ACT score: Mean (µ) = 21.5 Standard deviation (σ) = 5.4 For SAT…

Q: Consider the 5 numbers: 12, 5, 8, 12, 18. Which of the following is FALSE? The standard deviation is…

A:

Q: Laura learned that the average GPA in her school is 3.6 with a standard deviation of 0.3. If her GPA…

A: From the given information,   Mean = 3.6 Standard deviation = 0.3   The objective is to find the…

Q: Scores on a test have a mean of 6 and a standard deviation of 9. Michelle has a score of 57. Convert…

A:

Q: What is the sum of the deviation scores for the data in the frequency distribution table below?

A: Sum of deviation  of scores from mean is always zero.

Q: Decide if the following statement is true or false. Explain why. It is possible to have a standard…

A: We need to decide if the given statement that " It is possible to have a standard deviation of -2…

Q: The average and standard deviation for ACT scores are 20 and 3 respectively. average and standard…

A:

Q: SAT scores have a mean of 1026 and a standard deviation of 209. ACT scores have a mean of 20.8 and a…

A: The SAT scores, mean, and standard deviation are:The ACT scores, mean, and standard deviation are:

Q: . A distribution has a coefficient of variation of 65% and mean of 47. What is the value of the…

A:

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 117…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Use the sample mean(78.5)and sample standard deviation (12.3671)in your calculations below. Use…

A: Given information:

Q: people where sampled and their heights were recorded, it was discovered mean height was 5 feet and…

A: Given that  Population mean μ =5 feet 6.3 inches =66.3 1feet=12 inches  5feet=12×5=60+6.3=66.3…

Q: The IQ score that separates the bottom 15% from the top 85% is P,5 =. (Round to the nearest…

A:

Q: On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90,…

A: Given that, Mean = 72 Standard deviation = 7

Q: Assume that adults have IQ scores that are normally distributed with a mean of 105   and a standard…

A: It is given that the mean and standard deviation are 105 and 15, respectively.

Q: 2. The nicotine content in a single cigarette of a particular brand has a mean of 0.8 mg and a…

A: From the given information ,0.8 mg 0.1 gmsample size, n = 100We have to find the probability that…

Q: On a nationwide math test, the mean was 57 and the standard deviation was 4. If Roberto scored 90,…

A: Formula for z-score is

Q: The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances…

A:

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

A:

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: Given X is normal Distributed with mean µ = 500.0 and standard deviation σ = 100.0 now will using…

Q: The probability that a patient recovers from a delicate heart operation is 60%. There are 20…

A: Given data: Probability  = p = 0.60 Sample size (n) = 20 To find: What is the mean and standard…

Q: Cherise is interested in how her friends compare to the population for number of hours of television…

A: The test statistic is,

Q: If a data value has a z-score of 3.00 and the mean of the distribution is 100 with a standard…

A: 1) Given data, z=3 μ=100 σ=15 X=?