It reveals how many units of the standard deviation the raw score, x, is above or below the mean. A, standard normal distribution B, raw score C. normal distribution D. z-score
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It reveals how many units of the standard deviation the raw score, x, is above or below the
|
A, standard |
B, raw score |
C. normal distribution |
D. z-score |
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- Professional tennis players often “ace” their opponent, meaning they hit a serve into the service box and the opponent cannot get to it. The number of aces in a match can be approximated by a Normal curve as shown. 18 20 24 Number of aces 22 28 30 What is the mean and standard deviation of this distribution? Mean 2 aces Standard deviation = Mean = 24 aces Standard deviation Mean = Mean 24 aces 2 aces Mean = 30 aces Standard deviation = 2 aces 12 aces 24 aces Standard deviation = 18 aces Standard deviation = 4 acesWhich graphic representation could a researcher use to help determine if a continuous variable followed a normal distribution? Bar chart Pie chart Box and Whisker Plot Histogram and Box plot57. We have data from 100 economists in academics, private sector, and government perning their opinions whether the economy would be stable, expand or contract in the near future, However, a part of the information was lost. Based on the remaining data you are required to create a probability table. 32
- Normal Distribution Calculator: http://onlinestatbook.com/2/calculators/normal dist.html 2. Suppose the scores on a chemistry test were normally distributed with a mean of 78 and a standard deviation of 10. a. Label the horizontal axis appropriately on the Normal curve at right. b. Find the probability that the student earned fewer than 75 points. c. Find the probability that the student earned at least 70 points. 48 58 68 78 88 98 108 d. Find the probability that the student earned between 80 and 90 points. Shade the appropriate area in the figure, and then determine the proportion. e. Find the probability that the student earned either less than 80 points or more than 90 points.The mode of a normal distribution is 65.5 and the standard deviation is 8.4. Then, what is the median of the distribution? O a. 57.1 O b. 7.79 Oc. 73.9 d. 65.5Heights of 10-year-old male children follow a Normal distribution with μ =138 centimeters and σ = 7 centimeters. Create a sketch of a Normal curve depicting this distribution. Mark the horizontal axis with values that are one standard deviation above and below the mean. (Locate points of inflection on the curve as accurately as possible.) Then, use the 68–95–99.7 rule to determine the middle 68% of values. What percent of values fall below this range? What percent fall above this range?
- Identify if its true or false The mean, median and mode of normal distribution are NOT necessarily equal.Interpret the Z score for a student who scored an 91 on an exam that had a mean of 86 and a standard deviation of 5. One mean above the standard deviation One standard deviation above the mean One standard deviation below the mean One mean below the standard deviationUse the normal distribution of SAT critical reading scores for which the mean is 514 and the standard deviation is 115. Assume the variable x is normally distributed. (a) What percent of the SAT verbal scores are less than 650? (b) If 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 550? Click to view page 1 of the standard normal table. LOADING... Click to view page 2 of the standard normal table. LOADING... Question content area bottom Part 1 (a) Approximately 1.181.18% of the SAT verbal scores are less than 650. (Round to two decimal places as needed.) Part 2 (b) You would expect that approximately 0.880.88 SAT verbal scores would be greater than 550. (Round to the nearest whole number as needed.)
- What percent of the total population is found between the mean and the z-score given? (Use the standard normal distribution table and enter your answer to two decimal places.) z = 3.32Use a standard normal distribution table to find the percent of the total area under the standard normal curve between the following z-scores. z= - 1.3 and z = - 0.75 Click the icon to view the standard normal distribution table. The percent of the total area between z= - 1.3 and z = - 0.75 is %. (Round to the nearest integer.)What do you mean by a normal curve (normal distribution) ?
