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Question 4 3/4 pts Given a sample: 1.6, 5.2, 2.8, 3.7, 4.0 What's the sample mean?...
ne : × | G In a large data set the 40th : × | a...
ne : × | G In a large data set the 40th : × | a percentile to Data Value (M. s/95299/quizzes/117820/take/questions/1966887 ted: Jan 30 at 2:59pm uiz Instructions Χ 「¥ Flarworld Question 4 4 Given a sample: 1.6, 5.2,2.8,3.7,4.0 What's the sample mean? 3.46 What's the sample standard deviation? 1.35 (Round to two decimals) What's the z-score for 2.8? (Round to two decimals) 0.2 What's the percentile rank (an integer) for 2.8? Previous Subr No new data to save....
Question 4 0.5 pts A data set has a mean of 44. In this data set,...
Question 4 0.5 pts A data set has a mean of 44. In this data set, a raw score X-40 corresponds to the standardized score z-1. What is the standard deviation for this data set? Hint:take advantage of the formula for Z-score Question 5 0.5 pts A data set has a standard deviation of 2.5. In this data set, a raw score X-30 corresponds to the standardized score z = 1.30. What is the mean of this data set? Hint:take...
0.7 0.9 81.59 The results of a certain medical test are normally distributed with a mean...
0.7 0.9 81.59 The results of a certain medical test are normally distributed with a mean of 125 and a standard deviation of 19. (A score above 137 is considered unhealthy). Use the given table to find the percentage of people with readings below 134. |z-score 0.1 02 0.3 0.4 0.5 0.6 0.8 Percentile 53.98 57.93 61.79 65.54 69.15 72.57 75.80 78.81 Z-score 1.1 1.2 1.4 1.5 1.6 1.7 1.8 Percentile 86.43 88.49 90.32 91.92 93.32 94.52 95.54 96.41 z-score...
We collected a sample of the prices of new homes. The mean of our sample is...
We collected a sample of the prices of new homes. The mean of our sample is $255,000, with a standard deviation of $19,000. Calculate the z-scores of each of the given prices. Determine if the they are usual or unusual. Round up each z-score to two decimals. (a) $275, 000 (b) $230,000 (c) $210,000 (d) $290,000
A random sample of 92 observations produced a mean x=25.4and a standard deviation s=2.8. . Find...
A random sample of 92 observations produced a mean x=25.4and a standard deviation s=2.8. . Find a 99% confidence interval for μ.(______,______) (Use integers or decimals for any numbers in the expression. Round to two decimal places as needed.)
5.2 The Uniform Distribution Use the following information to answer the next ten questions. The data...
5.2 The Uniform Distribution Use the following information to answer the next ten questions. The data that follow are the square footage (in 1,000 feet squared) of 28 homes. 1.5 2.4 3.6 2.6 1.6 2.4 2.0 3.5 2.5 1.8 2.4 2.5 3.5 4.0 2.6 1.6 2.2 1.8 3.8 2.5 1.5 | Table 5.4 CHAPTER 5 CONTINUOUS RANDOM VARIABLES 325 2.8 1.8 4.5 1.9 1.9 3.1 1.6 Table 5.4 The sample mean = 2.50 and the sample standard deviation = 0.8302....
The weights for a group of 18-month-old girls are normally distributed with a mean of 24.9...
The weights for a group of 18-month-old girls are normally distributed with a mean of 24.9 pounds and a standard deviation of 2.8 pounds. Use the given table to find the percentage of 18-month-old girls who weigh between 16.6 and 23.8 pounds. Z-score -3.0 -2.9 -2.8 -2.7 -2.6 -2.5 -2.4 -2.3 -2.2 -2.1 Percentile 0.13 0.19 0.26 0.35 0.47 0.62 0.82 1.07 1.39 1.79 IZ-score -2.0 -1.9 -1.8 -1.7 -1.6 -1.4 -1.3 -1.2 -1.1 Percentile 2.28 2.87 3.59 4.46 5.48...
A random sample of 92 observations produced a mean x=25.4 and a standard deviation =2.8. a....
A random sample of 92 observations produced a mean x=25.4 and a standard deviation =2.8. a. Find a 95% confidence interval for μ. b. Find a 90% confidence interval for μ. c. Find a 99% confidence interval for μ. a. The 95% confidence interval is (____.______) (Use integers or decimals for any numbers in the expression. Round to two decimal places as needed b. The 90% confidence interval is (____.______) (Use integers or decimals for any numbers in the...
If two distributions have the same range, then what must be equal? a) their high and...
If two distributions have the same range, then what must be equal? a) their high and low data values 2. In a skewed distribution, the median is preferred over the mean as a measure of the center because a) the median is the most frequent number 3. If a distribution has a mean of 9 and five of the six data values are 6, 8, 11, 15, and 18, then the missing data value is: a) 0 4. Gail received...
1. If two distributions have the same range, then what must be equal? a) their high...
1. If two distributions have the same range, then what must be equal? a) their high and low data values 2. In a skewed distribution, the median is preferred over the mean as a measure of the center because: a) the median is the most frequent number İfadistribution has a mean of 9 and five ofthe six data values are 6, 8, 11, 15,and18,then the missing data value is: a) 0 4. Gail received a grade of 75 on her...
ne : × | G In a large data set the 40th : × | a percentile to Data Value (M. s/95299/quizzes/117820/take/questions/1966887 ted: Jan 30 at 2:59pm uiz Instructions Χ 「¥ Flarworld Question 4 4 Given a sample: 1.6, 5.2,2.8,3.7,4.0 What's the sample mean? 3.46 What's the sample standard deviation? 1.35 (Round to two decimals) What's the z-score for 2.8? (Round to two decimals) 0.2 What's the percentile rank (an integer) for 2.8? Previous Subr No new data to save....
Question 4 0.5 pts A data set has a mean of 44. In this data set, a raw score X-40 corresponds to the standardized score z-1. What is the standard deviation for this data set? Hint:take advantage of the formula for Z-score Question 5 0.5 pts A data set has a standard deviation of 2.5. In this data set, a raw score X-30 corresponds to the standardized score z = 1.30. What is the mean of this data set? Hint:take...
0.7 0.9 81.59 The results of a certain medical test are normally distributed with a mean of 125 and a standard deviation of 19. (A score above 137 is considered unhealthy). Use the given table to find the percentage of people with readings below 134. |z-score 0.1 02 0.3 0.4 0.5 0.6 0.8 Percentile 53.98 57.93 61.79 65.54 69.15 72.57 75.80 78.81 Z-score 1.1 1.2 1.4 1.5 1.6 1.7 1.8 Percentile 86.43 88.49 90.32 91.92 93.32 94.52 95.54 96.41 z-score...
5.2 The Uniform Distribution Use the following information to answer the next ten questions. The data that follow are the square footage (in 1,000 feet squared) of 28 homes. 1.5 2.4 3.6 2.6 1.6 2.4 2.0 3.5 2.5 1.8 2.4 2.5 3.5 4.0 2.6 1.6 2.2 1.8 3.8 2.5 1.5 | Table 5.4 CHAPTER 5 CONTINUOUS RANDOM VARIABLES 325 2.8 1.8 4.5 1.9 1.9 3.1 1.6 Table 5.4 The sample mean = 2.50 and the sample standard deviation = 0.8302....
The weights for a group of 18-month-old girls are normally distributed with a mean of 24.9 pounds and a standard deviation of 2.8 pounds. Use the given table to find the percentage of 18-month-old girls who weigh between 16.6 and 23.8 pounds. Z-score -3.0 -2.9 -2.8 -2.7 -2.6 -2.5 -2.4 -2.3 -2.2 -2.1 Percentile 0.13 0.19 0.26 0.35 0.47 0.62 0.82 1.07 1.39 1.79 IZ-score -2.0 -1.9 -1.8 -1.7 -1.6 -1.4 -1.3 -1.2 -1.1 Percentile 2.28 2.87 3.59 4.46 5.48...
If two distributions have the same range, then what must be equal? a) their high and low data values 2. In a skewed distribution, the median is preferred over the mean as a measure of the center because a) the median is the most frequent number 3. If a distribution has a mean of 9 and five of the six data values are 6, 8, 11, 15, and 18, then the missing data value is: a) 0 4. Gail received...
1. If two distributions have the same range, then what must be equal? a) their high and low data values 2. In a skewed distribution, the median is preferred over the mean as a measure of the center because: a) the median is the most frequent number İfadistribution has a mean of 9 and five ofthe six data values are 6, 8, 11, 15,and18,then the missing data value is: a) 0 4. Gail received a grade of 75 on her...
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