A set of population data has a mean of 520.4 and a standard deviation of 66.9. Calculate the z-score for a data point that has the value 635.4. Round your answer off to 2 decimal places.
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A set of population data has a
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- A student graduated from a 4 -year college with an outstanding loan of $9563 where the average debt is $8558 with a standard deviation of $1860 . Another student graduated from a university with an outstanding loan of $12,370 where the average of the outstanding loans was $10,318 with a standard deviation of $2144 Find the corresponding z score for each student. Round z scores to two decimal places. College student: =z University student: =zThe distribution of the scores on a standardized exam is approximately normal with mean 400 and standard deviation 35. Between what two values do the middle 50% of scores lie? Round to the nearest whole number. Write you answers with comma between them.The manager of a fast-food restaurant records each day for a year the amount of money received from sales of food that day. Using software, he finds a bell-shaped histogram with a mean of $1181 and a standard deviation of $201. Today the sales equaled $2041. Is this an unusually good day? Answer by providing statistical justification. Determine whether the total sales amount is unusual. Choose the correct answer below. A. No, this value is not unusual. A z-score outside of the range from −3 to 3 is not unusual. B. No, this value is not unusual. A z-score between −3 and 3 is not unusual. C. Yes, this value is unusual. A z-score between −3 and 3 is unusual. D. Yes, this value is unusual. A z-score outside of the range from −3 to 3 is unusual. Click to select your answer and then click Check Answer.
- The IRS claims it takes an average of 3.8 hours to complete a 1040 tax form. Assume the time to complete the form is normally distributed with a standard deviation of 45 minutes or 0.75 hours. Use the Cumulative Z-Score Table to answer the following questions. Write your answer as a percent using 2 decimal places. What percent of people would you expect to complete the form in less than 2.9 hours? % What percent of people would you expect to complete the form in more than 2.9 hours? What percent of people would you expect to complete the form in less than 4.775 hours? What percent of people would you expect to complete the form in more than 4.775 hours? % What percent of people would you expect to complete the form between 2.9 and 4.775 hours?i need helpJuan and his family are relocating to Los Angeles. They purchased a home they really like, which cost $739,000 . The mean home price in the area is $ 735,000 with a standard deviation $17,050 . Find the z-score of the price of Juan's home relative to the prices among all the homes in the area. Round your answer to two decimal places. z=
- The first statistics exam had a mean of 73 and a standard deviation of 15 points; the second had a mean of 83 and a standard deviation of 5 points. Anna scored a 82 on both tests. Megan scored 92 on the first exam and 7272 on the second. They both totaled 164 points on the two exams, but AnnaAnna claims that her total is better. Explain. Question content area bottom Part 1 The total of Anna's z-scores is enter your response here, which is greater than Megan's total of enter your response here. (Round to one decimal place as needed.)The latest SAT scores are out. The average SAT score for graduating seniors is 1059, and the standard deviation is 210. An exclusive academic fraternity wishes to contact those scoring in the the top 1% on the SAT. What score is required for you to make the cut? (Please round your answer to a whole number, eg 1014.)The amount of caffeine in a sample of five-ounce servings of brewed coffee is shown in the histogram. Make a frequency distribution for the data. Then use the table to estimate the sample mean and the sample standard deviation of the data set. Click the icon to view the histogram. Complete the table. Round values to the nearest tenth as needed. Graph/chart f Midpoint x xf 70.5 Ay 30- 92.5 26 25- 114.5 136.5 20- 158.5 15- 12 Ef = Exf = 10- Find the mean of the data set. 5- X = (Round to the nearest tenth as needed.) 48.5 70.5 92.5 114.5 136.5 158.5 Complete the table. Round values to the nearest tenth as needed. Midpoint x (x-x)? (x-x)?f X-X 70.5 Print Done 92.5 114.5 136.5 158.5 (x-x)?r= ] of
