MAT 300 Unit 2 Milestone Exam Answer Sophia | several sets

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1 A fast-food restaurant gave a “Customer Satisfaction Survey” in which 1500 customers rated how satisfied they were with service. The results are shown below as a table. Rating Frequency Extr... emely Satisfied 234 Satisfied 443 Neutral 246 Dissatisfied 203 Extremely Dissatisfied 374 The relative frequency of people who were dissatisfied with the service is __________.  13.5%  29.5%  20.3%  38.5% 2 The formula for the standard deviation of a sample is: Select the true statement for the following data set that has a mean of 8: 4, 6, 6, 6, 9, 9, 12, 12 Answer choices are rounded to the hundredths place.  The variance is 2.98 and the standard deviation is 8.86.  The variance is 8.86 and the standard deviation is 7.50.  The variance is 8.86 and the standard deviation is 2.98.  The variance is 7.50 and the standard deviation is 2.98. 3 Let x stand for the number of minutes spent waiting in line for a rollercoaster at an amusement park. 81 people are sampled at a time. The sample mean is 18 minutes and the sample standard deviation is 0.5 minutes. What is the standard deviation of the population?  18  4.5  0.5  2 4 Mike's electronics store sold the following number of cellphones on each of the seven days of a week. Day Cell Phones Sold Sunday 12 Monday 10 Tuesday 9 Wednesday 5 Thursday 14 Friday 10 Saturday 10 The mean number of cell phones sold by the store for the week was __________.  5 phones  70 phones  9 phones  10 phones 5 The average daily rainfall for the past week in the town of Hope Cove is normally distributed, with a mean rainfall of 2.1 inches and a standard deviation of 0.2 inches. If the distribution is normal, what percent of data lies between 1.9 inches and 2.3 inches of rainfall?  34%  99.7%  68%  95% 6 Choose the statement that correctly describes a normal distribution.  The approximate percent of values lying within two standard deviations of the mean is 47.5%.  Approximately 68% of the values are greater than the mean value.  The approximate percent of values lying within three standard deviations of the mean is 49.85%.  Approximately 68% of the values lie within one standard deviation of the mean. 7 Hannah noted the height of each student in her class and found that the mean height of the students is 56 inches, with a standard deviation of 1.2 inches. The height of one of the students, James, is 59 inches. What is the z-score for James' height?  -3.6  2.5  3.6  -2.5 [Show More]

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