Homework Answers
Solution: Given that the population mean 
. The
sample mean is
We know that the sampling error for the sample is the difference
between the population mean and the sample mean.
So sampling error = |122 - 122.375| = |-0.375| = 0.375
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A population has a mean of 120. If a random sample of 8 items from the...
A population has a mean of 124. If a random sample of 8 items from the...
A population has a mean of 124. If a random sample of 8 items from the population results in the following sampled values, what is the sampling error for the sample? 106 143 103 105 147 110 122 127 The sampling error for the given sample is . (Simplify your answer. Do not round)
A population has a mean of 122 . If a random sample of 8 items from...
A population has a mean of 122 . If a random sample of 8 items from the population results in the following sampled values, what is the sampling error for the sample 100 147 97 127 141 144 101 130
A population has a mean of 121 If a random sample of 8 items from the...
A population has a mean of 121 If a random sample of 8 items from the population results in the following sama the sampling error for the sample? 118 121 97 140 141 127 138 124
15 points] 6. A population has a mean of 126. If a random sample of 8...
15 points] 6. A population has a mean of 126. If a random sample of 8 items from the population results in the following sampled values, what is the sampling error for the sample? 134 138 105 142 148 137 114 115 [10 points] 7. A company manager thinks he is overpaying for fertilizer at $175 per ton. To find out, he collects fertilizer prices per ton from five distributors. a. Construct a 90% confidence interval for the true mean,...
Question 16 1 pts A population has a mean of 121 If a random sample of...
Question 16 1 pts A population has a mean of 121 If a random sample of 8 items from the population results in the following sampled values what it the sampling error for the sample? 118 121 97 140 141 127 138 124 Question 17 1 pts A company makes windows for use in homes and commercial buildings. The standards for glass thickness call for the glass to average 0.500 inch with a standard deviation equal to 0.045 inch. Suppose...
1. A population has a mean of 129. If a random sample of 8 items from...
1. A population has a mean of 129. If a random sample of 8 items from the population results in the following sampled values, what is the sampling error for the sample? 145, 129, 108, 153, 149, 154, 117, 120 2. For a population with a mean equal to 250 and a standard deviation equal to 25, calculate the standard error of the mean for the following sample sizes. a) 10 b) 40 c) 70 3. Managers at a local...
Suppose nine items are sampled from a normally distributed population with a mean of 116 and...
Suppose nine items are sampled from a normally distributed population with a mean of 116 and a standard deviation of 17. The nine randomly sampled values are shown in the table. 145 111 114 141 117 143 100 71 102 Calculate the probability of getting a sample mean that is smaller than the mean for these nine sampled values. The probability that a sample mean is smaller than the mean for these nine values = (Round to four decimal places...
A simple random sample of 60 items resulted in a sample mean of 84. The population...
A simple random sample of 60 items resulted in a sample mean of 84. The population standard deviation is 16. a. Compute the 95% confidence interval for the population mean (to 1 decimal). ( b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals). ( c. What is the effect of a larger sample size on the margin of error? Select Select It...
A simple random sample of 60 items resulted in a sample mean of 65. The population...
A simple random sample of 60 items resulted in a sample mean of 65. The population standard deviation is 17. a. Compute the 95% confidence interval for the population mean (to 1 decimal). ( , ) b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals). ( , ) c. What is the effect of a larger sample size on the margin of error? Select It increases...
A simple random sample of 60 items resulted in a sample mean of 63. The population...
A simple random sample of 60 items resulted in a sample mean of 63. The population standard deviation is 17. a. Compute the 95% confidence interval for the population mean (to 1 decimal). O O b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals). O O O c. What is the effect of a larger sample size on the margin of error?...
A population has a mean of 124. If a random sample of 8 items from the population results in the following sampled values, what is the sampling error for the sample? 106 143 103 105 147 110 122 127 The sampling error for the given sample is . (Simplify your answer. Do not round)
A population has a mean of 121 If a random sample of 8 items from the population results in the following sama the sampling error for the sample? 118 121 97 140 141 127 138 124
15 points] 6. A population has a mean of 126. If a random sample of 8 items from the population results in the following sampled values, what is the sampling error for the sample? 134 138 105 142 148 137 114 115 [10 points] 7. A company manager thinks he is overpaying for fertilizer at $175 per ton. To find out, he collects fertilizer prices per ton from five distributors. a. Construct a 90% confidence interval for the true mean,...
Question 16 1 pts A population has a mean of 121 If a random sample of 8 items from the population results in the following sampled values what it the sampling error for the sample? 118 121 97 140 141 127 138 124 Question 17 1 pts A company makes windows for use in homes and commercial buildings. The standards for glass thickness call for the glass to average 0.500 inch with a standard deviation equal to 0.045 inch. Suppose...
A simple random sample of 60 items resulted in a sample mean of 84. The population standard deviation is 16. a. Compute the 95% confidence interval for the population mean (to 1 decimal). ( b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals). ( c. What is the effect of a larger sample size on the margin of error? Select Select It...
A simple random sample of 60 items resulted in a sample mean of 63. The population standard deviation is 17. a. Compute the 95% confidence interval for the population mean (to 1 decimal). O O b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals). O O O c. What is the effect of a larger sample size on the margin of error?...
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