Percentage of scores falling below a z of -.24 Student provided the following answer: 9.48% of...

Percentage of scores falling below a z of -.24

Student provided the following answer: 9.48% of scores fall below a z-score of -.24

Is the students answer correct? If not, what did they do wrong and what is the correct answer?

Expert Solution

The percentage below the Z scores is calculated using Z-score shown below, but the table always gives the proportion not the percentage so, we need to convert it into a percentage by multiplying it with 100,

let's find out the proportion first below Z= -0.24

so, from Z table we can see that the proportion below is 0.4052 so, the percentage of scores fall below Z=-0.24 is 0.4052*100=40.52%

orchestra answered 1 year ago

Use the z-table provided and answer the following questions. 41. What is the proportion of scores...

Use the z-table provided and answer the following questions. 41. What is the proportion of scores greater than z = 1.15? 42. What is the proportion of scores less than z = 1.73? 43. What is the proportion of scores greater than z = -0.90? 44. What is the proportion of scores between z = -1.04 and z = 1.39? 45. What is the proportion of scores between z = 1.08 and z = 1.21? 46. If the proportion of...

reffering to a standard normal distribution. Find the percentage of the cases falling bellow Z= -1.3

1. Which of the following z-scores is located furthest AND below the mean of a distribution?...

1. Which of the following z-scores is located furthest AND below the mean of a distribution? a.z = -3.0 b.z = -1.0 c.z = +1.0 d.z = +3.0 2. All of the following apply to the concept of variability EXCEPT: a.it is a form of inferential statistics b.it is a form of descriptive statistics c.it measures the extent to which scores deviate from the mean d.it measures distance/spread of scores in a distribution 3. Which statement best describes the concept...

if your z- score is 1.645, what percentage of scores is above your value? a 68...

if your z- score is 1.645, what percentage of scores is above your value? a 68 b 5 c 97.5 d 95 e 2.5

An IQ test has scores converted to Z scores. What % of people fall below a...

An IQ test has scores converted to Z scores. What % of people fall below a z = -2? Group of answer choices 2.28% 47.7% 97.7% 2%

4. Convert the following x-scores to z-scores: a) 8 &nbs

4. Convert the following x-scores to z-scores: a) 8 b) 21.5 5. Convert the following z-scores to x-scores: a) .2667 6.Find the area under the curve: a) to the left of z = 1.15 b) to the left of z = -0.24 c) to the right of z = 1.06 d) between z = 1.25 and z = -1. 7.A survey indicates that people use their computers an average of 2.4 years before upgrading...

Homework 4: Probability and z scores Use the data to answer the following questions Show all...

Homework 4: Probability and z scores Use the data to answer the following questions Show all work (*round 2 decimals places) What is the mean & SD for the distribution of scores? What is the corresponding z score for each raw score? What is the probability of getting a raw score greater than 4? What is the probability of getting a raw score less than 2? What is the probability of a raw score between 4 & 6? What is...

Use the z-score table to answer the question. Note: Round z-scores to the nearest hundredth and...

Use the z-score table to answer the question. Note: Round z-scores to the nearest hundredth and then find the required A values using the table. A psychologist finds that the intelligence quotients of a group of patients are normally distributed, with a mean of 101 and a standard deviation of 16. Find the percent of the patients with the following IQs. (a) above 113 % (b) between 89 and 119 %

Answer the following questions based on the information provided below: You are conducting a study to...

Answer the following questions based on the information provided below: You are conducting a study to determine the impact of a new reading intervention on students test scores. You randomly assign 40 students to either the intervention group or the control group (those not participating in the intervention). You also break the students into morning and afternoon classes to determine which is the best time of day to conduct the intervention. 1. What is the dependant variable? 2. What is/are...

Please read the case provided below and answer the following question: In 2007, JetBlue was a...

Please read the case provided below and answer the following question: In 2007, JetBlue was a booming young airline with a strong reputation for outstanding service. In fact, the low-fare airline referred to itself as a customer service company that just happened to fly planes. But on Valentine’s Day 2007, JetBlue was hit by the perfect storm—literally—of events that led to an operational meltdown. One of the most severe storms of the decade covered JetBlue’s main hub at New York’s...

Question