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I. The data below set represents the scores of 12 randomly selected students on the SAT...
1. Suppose the scores for high school seniors on the verbal portion of the SAT test...
1. Suppose the scores for high school seniors on the verbal portion of the SAT test have a population mean of 509 and a population standard deviation of 112. a. List the population and the variable. b. What do you know about the population distribution of SAT scores for high school seniors? (i.e. shape, center, spread) c. Suppose we randomly select 56 high school seniors from this population. What would you expect the shape, mean and standard deviation of the...
2. The following data represents Math SAT scores for a sample of 10 NCC entering students....
2. The following data represents Math SAT scores for a sample of 10 NCC entering students. 610 540 530 480 530 490 580 590 670 440 For this data: a) [1 pt] Find the mean b) [1 pt] Find the median c) [1 pt] Find the mode d) [2 pts] Find the standard deviation e) [1 pt] Find the variance f) [1 pt] Find the Range g) [1 pt] Find the Interquartile Range (IQR) D alo s h) [3 pts]...
Question 8 2 pts A sprinkler manufacturer claims that the average activating temperatures is at least...
Question 8 2 pts A sprinkler manufacturer claims that the average activating temperatures is at least 134 degrees. To test this claim, you randomly select a sample of 32 systems and find the mean activation temperature to be 133 degrees. Assume the population standard deviation is 3.3 degrees. Find the standardized test statistic and the corresponding p-value O z-test statistic - -1.71, p-value-0.0432 O z-test statistic -1.71, p-value -0.0865 O z-test statistic -1.71, p-value- 0.0865 O z-test statistic - 1.71,...
Question 2 4 points ✓ Saved A manufacturer of sprinkler systems designed for fire protection claims...
Question 2 4 points ✓ Saved A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperature is 135 degrees. To test this claim, a (type in "left","right", or "two") -tailed hypothesis should be set up, A random sample of 32 systems has a mean activation temperature 134 degrees with a standard deviation of 3.3 degrees. What is the P-value for this sample? Round to the nearest thousandth. At significant level 0.1, Is there enough evidence...
a)A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperature is...
a)A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperature is 135 degrees. To test this claim, a (type in "left", "right", or "two") -tailed hypothesis should be set up. b)A random sample of 32 systems has a mean activation temperature 134 degrees with a standard deviation of 3.3 degrees. What is the P-value for this sample? Round to the nearest thousandth. c)At significant level 0.1, is there enough evidence to reject the manufacturer's clam?...
SAT reading and writing section scores of a random sample of twenty 11th-grade students in a...
SAT reading and writing section scores of a random sample of twenty 11th-grade students in a certain high school are given below. 380 520 480 510 560 630 670 490 500 550 400 350 440 490 620 660 700 730 740 560 Test if the standard deviation of the reading and writing section SAT score of the students in this school is higher than 100. What is the value of the test statistic (round off to the nearest integer)?
Problem 1. 531.1 and standard deviation a-29.4 (2 points) The scores of students on the SAT...
Problem 1. 531.1 and standard deviation a-29.4 (2 points) The scores of students on the SAT colloge entrance examinations at a certain high school had a normal distribution with mean (a) What is the probability that a single student randomly chosen from all those taking the test scores 536 or higher? ANSWER For parts (b) through (d), consider a simple random sample (SRS) of 30 students who took the test (b) What are the mean and standard deviation of the...
For randomly selected adults, IQ scores are normally distributed with a standard deviation of 15. For...
For randomly selected adults, IQ scores are normally distributed with a standard deviation of 15. For a simple random sample of 25 randomly selected college students, their IQ scores have a standard deviation of 18. Use a 5% level of significance; test the claim that the IQ scores of college students are less consistent (higher standard deviation) compare to the IQ scores of the general population.
The scores of students on the SAT college entrance examinations at a certain high school had...
The scores of students on the SAT college entrance examinations at a certain high school had a normal distribution with mean μ=556.6 and standard deviation σ=27.7.(a) What is the probability that a single student randomly chosen from all those taking the test scores 562 or higher?For parts (b) through (d), consider a simple random sample (SRS) of 35 students who took the test.(b) What are the mean and standard deviation of the sample mean score x̅x̅, of 35 students?The mean...
The scores of students on the SAT college entrance examinations at a certain high school had...
The scores of students on the SAT college entrance examinations at a certain high school had a normal distribution with mean μ=557.1 and standard deviation σ=29. (a) What is the probability that a single student randomly chosen from all those taking the test scores 562 or higher? For parts (b) through (d), consider a simple random sample (SRS) of 35 students who took the test. (b) What are the mean and standard deviation of the sample mean score x¯, of...
2. The following data represents Math SAT scores for a sample of 10 NCC entering students. 610 540 530 480 530 490 580 590 670 440 For this data: a) [1 pt] Find the mean b) [1 pt] Find the median c) [1 pt] Find the mode d) [2 pts] Find the standard deviation e) [1 pt] Find the variance f) [1 pt] Find the Range g) [1 pt] Find the Interquartile Range (IQR) D alo s h) [3 pts]...
Question 8 2 pts A sprinkler manufacturer claims that the average activating temperatures is at least 134 degrees. To test this claim, you randomly select a sample of 32 systems and find the mean activation temperature to be 133 degrees. Assume the population standard deviation is 3.3 degrees. Find the standardized test statistic and the corresponding p-value O z-test statistic - -1.71, p-value-0.0432 O z-test statistic -1.71, p-value -0.0865 O z-test statistic -1.71, p-value- 0.0865 O z-test statistic - 1.71,...
Question 2 4 points ✓ Saved A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperature is 135 degrees. To test this claim, a (type in "left","right", or "two") -tailed hypothesis should be set up, A random sample of 32 systems has a mean activation temperature 134 degrees with a standard deviation of 3.3 degrees. What is the P-value for this sample? Round to the nearest thousandth. At significant level 0.1, Is there enough evidence...
SAT reading and writing section scores of a random sample of twenty 11th-grade students in a certain high school are given below. 380 520 480 510 560 630 670 490 500 550 400 350 440 490 620 660 700 730 740 560 Test if the standard deviation of the reading and writing section SAT score of the students in this school is higher than 100. What is the value of the test statistic (round off to the nearest integer)?
Problem 1. 531.1 and standard deviation a-29.4 (2 points) The scores of students on the SAT colloge entrance examinations at a certain high school had a normal distribution with mean (a) What is the probability that a single student randomly chosen from all those taking the test scores 536 or higher? ANSWER For parts (b) through (d), consider a simple random sample (SRS) of 30 students who took the test (b) What are the mean and standard deviation of the...
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