Question 16 1 pts A population has a mean of 121 If a random sample of...
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 random sample of n=51 windows yields a sample mean of 0.519 inch. What is the probability of getting a sample mean greater or equal to 0.519, if the windows meet the standards? (Round to four decimal places as needed.)
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
A normally distributed population has a mean of 500 and a standard deviation of 80. a. Determine the probability that a random sample of size 25 selected from this population will have a sample mean less than 463 . b. Determine the probability that a random sample of size 16 selected from the population will have a sample mean greater than or equal to 538. A company makes windows for use in homes and commercial buildings. The standards for glass...
A company makes windows for use in homes and commercial buildings. The standards for glass thickness call for the glass to average 0.4000 inch with a standard deviation equal to 0.0500 inch. Suppose a random sample of n=48 windows yields a sample mean of 0.4190inch. Complete parts a and b below. a. P(xbar more than 0.419)= 0.0043 b. . Based on your answer to part a, what would you conclude about the population of windows? Is it meeting the standards?...
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 120. If a random sample of 8 items from the population results in the following sampled values, what is the sampling error for the sample? 127 116 102 116 142 138 122 116 The sampling error for the given sample is (Type an integer or a decimal.) h
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)
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,...
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...
(10 pts) Archeologists have discovered a sample of ancient Egyptian skulls from two different time periods, 4000 B.C. and 150 A.D. They believe that the mean maximum skull breadth (the width of the skull at its widest part) has increased from 4000 B.C. to 150 A.C. A sample of 13 Eqyptian skull breadths (in mm) from each time period is show below: 4000 B.C. 150 A.D. (a) Calculate the mean and standard deviation for each data set. Round each mean...