what is the lowest possible Score for the student to get a mark of A.
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The average grade for an exam is 74, and the standard deviation is 7. If 12% ofthe class is given As, and the grades are curved to follow a
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- Suppose that the mean weight for men 18 to 24 years old is 170 pounds, and the standard deviation is 20 pounds. In each part, find the value of the standardized score (z-score) for the given weight. (a) 205 pounds.z = (b) 146 pounds.z = (c) 175 pounds.z = (d) 240 pounds.You are told that a set of data includes one score which is 0.8.The standard deviation for the set is 0. Can you give the mean of the set and say anything else about the six other scores in the set?Please answer B, C, & D.
- The mean height of 790 students in a school is 151 cm and the standard deviation is 15 cm. Assume that the heights are normally distributed. How many students have heights between 119.5 cm and 155.5 cm? Select one: a. 474 students b. 381 students c. 316 students d. 93 students e. 395 studentsAssume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find P25, which is the IQ score separating the bottom 25% from the top 75%. Round your answer to nearest tenth.A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations is his height above the mean?
- on a nationwide math test,the mean was 63 and the standard deviation was 7. if roberto scored 75,what was his z-score?The time is takes a studen to walk from the dorn to the chemistry lab follows roughly a Normal distrubtion with a mean of 20 minutes and a stardard deviation of 3 minutes. What porportion of students is faster than 15 minutes when walking from the dorm to the chemistry lab?Sarah was told that she scored two standard deviations above the mean on her PSYCÓ 104 final exam. Her instructor posted the class distribution and revealed the mean was 65% and the standard deviation was 10%. What was Sarah's test result? cro O a. 55% cro O b. 45% cro O c. 85% crc O d. 75% crc O e. 55%
- If the grades of 100 students have mean 18 and standard deviation 4. If we subtract 3 from each student, then we divide by -2. The new standard deviation is Select one: O a. 2 O b. 4 O c. -2 O d. -4Valentina obtained a score of 75 in a science exam and 90 on her English exam. on which test did she show better performance to the rest of the class? consider the mean and standard deviation values for science is 80 and 8 respectively and for English are 140 and 25.Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find P40, which is the IQ score separating the bottom 40% from the top 60%. Round your answer to nearest tenth.
