Homework Answers
The histogram is right skewed as right tail is longer than left tail. Hence,
The appropriate numerical measures will be median and IQR.
Hence, the correct option will be:
None of the above; Option F is correct.
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Question 10 of 20 Here again, is the distribution of number hours of exercise per week...
Assume that the number of hours college students spend working per week is normally distributed with...
Assume that the number of hours college students spend working
per week is normally distributed with a mean of 18 hours and
standard deviation of 4 hours
2. Assume that the number of hours that college students spend working per week is normally distributed with a mean of 18 hours and a standard deviation of 4 hours. a. Mark the 7 hash marks on the x-axis with the appropriate labels in hours worked per week. Recall that the center hash...
The distribution of hours of sleep per week night, among college students, is found to be...
The distribution of hours of sleep per week night, among college students, is found to be Normally distributed, with a mean of 6.5 hours and a standard deviation of 1 hour. What range contains the middle 95% of hours slept per week night by college students (a) 5.5 and 7.5 hours per week night (b) 4.5 and 7.5 hours per week night (c) 4.5 and 8.5 hours per week night 3.19
The following frequency distribution represents the number of hours studied per week by a sample of...
The following frequency distribution represents the number of hours studied per week by a sample of 50 students. Picture Refer to Exhibit 3-8. The standard deviation of the number of hours studied is: 1.89. 2.79. 3.50. 3.56. hours studied midpoint frequency 2.5 less than 5.5 4 5 5.5 less than 8.5 7 30 8.5 less than 11.5 10 25
A survey of 200 middle managers showed a distribution of the number of hours of exercise...
A survey of 200 middle managers showed a distribution of the number of hours of exercise they participated in per week with a mean of 3.71 hours and a standard deviation of 4.92 hours. Complete parts (a) through (c) below. a) According to the Normal model, what percent of managers will exercise fewer than one standard deviation below the mean number of hours? ___ % (Round to the nearest whole number as needed.) b) For these data, what does that...
A small warehouse employs a supervisor at $1200 a week, an inventory manager at $700 a...
A small warehouse employs a supervisor at $1200 a week, an inventory manager at $700 a week, six stock boys at $400 a week, and four drivers at $500 a week. a) Find the mean and median wage. b) How many employees earn more than the mean wage? c) Which measure of center best describes a typical wage at this company: the mean or the median? d) Which measure of spread would best describe the payroll: the range, the IQR,...
The number of hours spent online by college students is claimed to be 22.5 hours per...
The number of hours spent online by college students is claimed to be 22.5 hours per week with a standard deviation of 2.1 hours. a)suppose we randomly select 50 college students, what is the probability that the mean number of hours online is greater than 25 B) Suppose i survey the 50 game programming students and the mean number of hours spent online is 25 hours per week. Is this unusual? Why or why not?
2. Suppose we are interested in the relationship between number of hours of exercise per week...
2. Suppose we are interested in the relationship between number of hours of exercise per week and systolic blood pressure in males 50 years of age. A random sample of 10 males 50 years of age is selected. In this analysis, the IV is number of hours of exercise per week and the DV is systolic blood pressure. The data are as follows: X = #hrs of exercise WkY=systolic BPXY 120 4 10 3 3 1 2 2 110 120...
1. To determine the average number of hours spent studying by college students per week, a...
1. To determine the average number of hours spent studying by college students per week, a sample of 39 students was randomly selected, and found to spend an average of 17.1 hours per week, with a standard deviation of 4.3 hours. Find the 90% confidence interval for the mean number of hours spent studying per week by all college students. What is the upper and lower bound? 2. If I asked a random student how many hours they study per...
5.66 Exercise and Gender The dataset Exercise- Hours contains information on the amount of exercise (hours...
5.66 Exercise and Gender The dataset Exercise- Hours contains information on the amount of exercise (hours per week) for a sample of statis- tics students. The mean amount of exercise was 9.4 hours for the 30 female students in the sample and 12.4 hours for the 20 male students. A randomiza- tion distribution of differences in means based on these data, under a null hypothesis of no difference in mean exercise time between females and males, is centered near zero...
The times that college students spend studying per week have a distribution skewed to the right...
The times that college students spend studying per week have a distribution skewed to the right with a mean of 8.6 hours and a standard deviation of 2.8 hours. Find the probability that the mean time spent studying per week for a random sample of 49 college students would be between 8.2 and 8.9 hours. Round your answer to two decimal places.
Assume that the number of hours college students spend working
per week is normally distributed with a mean of 18 hours and
standard deviation of 4 hours
2. Assume that the number of hours that college students spend working per week is normally distributed with a mean of 18 hours and a standard deviation of 4 hours. a. Mark the 7 hash marks on the x-axis with the appropriate labels in hours worked per week. Recall that the center hash...
The distribution of hours of sleep per week night, among college students, is found to be Normally distributed, with a mean of 6.5 hours and a standard deviation of 1 hour. What range contains the middle 95% of hours slept per week night by college students (a) 5.5 and 7.5 hours per week night (b) 4.5 and 7.5 hours per week night (c) 4.5 and 8.5 hours per week night 3.19
2. Suppose we are interested in the relationship between number of hours of exercise per week and systolic blood pressure in males 50 years of age. A random sample of 10 males 50 years of age is selected. In this analysis, the IV is number of hours of exercise per week and the DV is systolic blood pressure. The data are as follows: X = #hrs of exercise WkY=systolic BPXY 120 4 10 3 3 1 2 2 110 120...
5.66 Exercise and Gender The dataset Exercise- Hours contains information on the amount of exercise (hours per week) for a sample of statis- tics students. The mean amount of exercise was 9.4 hours for the 30 female students in the sample and 12.4 hours for the 20 male students. A randomiza- tion distribution of differences in means based on these data, under a null hypothesis of no difference in mean exercise time between females and males, is centered near zero...
The times that college students spend studying per week have a distribution skewed to the right with a mean of 8.6 hours and a standard deviation of 2.8 hours. Find the probability that the mean time spent studying per week for a random sample of 49 college students would be between 8.2 and 8.9 hours. Round your answer to two decimal places.
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