Homework Answers
The correct answer is: Fail to reject Ho (one-sided sign test (alternative: greater) with exact binomial probabilities s=7, n=10, p-value=0.090)
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Ten different families are tested for the number of litres of water a week they use...
Ten different families are tested for the number of gallons of water a day they use...
Ten different families are tested for the number of gallons of water a day they use before and after viewing a conservation video. At the 0.05 significance level, test the claim that the mean is the same before and after the viewing. Use the critical value method of hypothesis testing. What're alternative hypothesis? the critical value, test statistic and statistical conclusion? Before After 33 34 33 28 38 25 33 28 35 35 35 33 40 31 40 28 40...
the means the same before and after the Ten different families are tested for the number...
the means the same before and after the Ten different families are tested for the number of gallons of water a day they use before and after viewing a conservation video. At the 0.05 picance level test them viewing Before 33 33 33 35 35 20 40 40 31 After 34 3135 30 35 33 39 34 35 33 pwalue: 0.0774 Because p alpha we fail to reject the null hypothesis. There is not sur cent evidence to reject the...
28 11. (10 points) Ten randomly selected families are tested for the number of gallons of...
28 11. (10 points) Ten randomly selected families are tested for the number of gallons of water a day they use before and after viewing a conservation video. The results are shown below. Before 33 33 38 33 35 35 40 40 40 31 After 34 25 28 35 33 31 28 35 33 Assume that the paired differences are normally distributed. At the 1% significance level, do the data provide sufficient evidence to conclude that the mean amount of...
35 33 34 11. (10 points) Ten randomly selected families are tested for the number of...
35 33 34 11. (10 points) Ten randomly selected families are tested for the number of gallons of water a day they use before and after viewing a conservation video. The results are shown below. Before 33 38 33 35 40 40 40 31 After 28 25 28 35 33 31 28 35 33 Assume that the paired differences are normally distributed. At the 1% significance level, do the data provide sufficient evidence to conclude that the mean amount of...
35 33 34 11. (10 points) Ten randomly selected families are tested for the number of...
35 33 34 11. (10 points) Ten randomly selected families are tested for the number of gallons of water a day they use before and after viewing a conservation video. The results are shown below. Before 33 38 33 35 40 40 40 31 After 28 25 28 35 33 31 28 35 33 Assume that the paired differences are normally distributed. At the 1% significance level, do the data provide sufficient evidence to conclude that the mean amount of...
Problem 3. Ten different families are tested for the number of gallons of water a day...
Problem 3. Ten different families are tested for the number of gallons of water a day they use before and after viewing a conservation video. Before: 33 33 38 33 35 35 40 40 40 31 After: 34 28 25 28 35 33 31 28 35 33 Is there enough evidence to support that the amount of gallons of water used before is greater than the amount of gallons of water used after. Use a 0.05. (Hint: This is a...
The weights (in pounds) of 30 preschool children are listed below. Find the five-number summary. 25...
The weights (in pounds) of 30 preschool children are listed below. Find the five-number summary. 25 29 25 26 26.5 27 27 27.5 28 28 28.5 29 30 30 30.5 31 31 32 32.5 32.5 33 34 34.5 35 35 37 37 38 38 33 O A. Min = 25, Q1 = 28, Q2 = 30.5, Q3 = 34, Max = 38 O B. Min = 25, Q1 = 27.5, Q2 = 30.5, Q3 = 33.5, Max = 38 C....
A store owner surveyed 25 randomly selected customers and found the ages shown (in years). The...
A store owner surveyed 25 randomly selected customers and found the ages shown (in years). The mean is 32.36 and the standard deviation is 11.79. The owner wants to know f the mean age of all customers is 36 years old. Use the given information to complete parts a through . 14 12 18 22 16 42 48 44 28 40 41 3743 44 38 16 20 39 48 31 30 34 21 47 36 a) What is the null...
_ 9) In a sample of 10 randomly selected women, it was found that their mean height was 634 inches. From previous...
_ 9) In a sample of 10 randomly selected women, it was found that their mean height was 634 inches. From previous studies, it is assumed that the standard deviation, , 124 inches and that the population of height measurements is normally distributed a) Construct the confidence interval for the population mean height of women b) If the sample size was doubled to 20 women, what will be the effect on the confidence interval? 10) 10) The numbers of advertisements...
2 The data given below show the number of overtime hours worked in one week per...
2 The data given below show the number of overtime hours worked in one week per employee. Use the data to complete parts (a) and (b) Overtime hours 1 3 4 5 6 Employees 8 13 29 57 43 28 18 (6) Construct a probability distribution b) Graph the probability distribution using a histogram and describe its shape (a) Construct the probability distribution by completing the table below. 1 2 3 4 5 0 PE (Round to three decimal places...
Ten different families are tested for the number of gallons of water a day they use before and after viewing a conservation video. At the 0.05 significance level, test the claim that the mean is the same before and after the viewing. Use the critical value method of hypothesis testing. What're alternative hypothesis? the critical value, test statistic and statistical conclusion? Before After 33 34 33 28 38 25 33 28 35 35 35 33 40 31 40 28 40...
the means the same before and after the Ten different families are tested for the number of gallons of water a day they use before and after viewing a conservation video. At the 0.05 picance level test them viewing Before 33 33 33 35 35 20 40 40 31 After 34 3135 30 35 33 39 34 35 33 pwalue: 0.0774 Because p alpha we fail to reject the null hypothesis. There is not sur cent evidence to reject the...
28 11. (10 points) Ten randomly selected families are tested for the number of gallons of water a day they use before and after viewing a conservation video. The results are shown below. Before 33 33 38 33 35 35 40 40 40 31 After 34 25 28 35 33 31 28 35 33 Assume that the paired differences are normally distributed. At the 1% significance level, do the data provide sufficient evidence to conclude that the mean amount of...
35 33 34 11. (10 points) Ten randomly selected families are tested for the number of gallons of water a day they use before and after viewing a conservation video. The results are shown below. Before 33 38 33 35 40 40 40 31 After 28 25 28 35 33 31 28 35 33 Assume that the paired differences are normally distributed. At the 1% significance level, do the data provide sufficient evidence to conclude that the mean amount of...
35 33 34 11. (10 points) Ten randomly selected families are tested for the number of gallons of water a day they use before and after viewing a conservation video. The results are shown below. Before 33 38 33 35 40 40 40 31 After 28 25 28 35 33 31 28 35 33 Assume that the paired differences are normally distributed. At the 1% significance level, do the data provide sufficient evidence to conclude that the mean amount of...
Problem 3. Ten different families are tested for the number of gallons of water a day they use before and after viewing a conservation video. Before: 33 33 38 33 35 35 40 40 40 31 After: 34 28 25 28 35 33 31 28 35 33 Is there enough evidence to support that the amount of gallons of water used before is greater than the amount of gallons of water used after. Use a 0.05. (Hint: This is a...
The weights (in pounds) of 30 preschool children are listed below. Find the five-number summary. 25 29 25 26 26.5 27 27 27.5 28 28 28.5 29 30 30 30.5 31 31 32 32.5 32.5 33 34 34.5 35 35 37 37 38 38 33 O A. Min = 25, Q1 = 28, Q2 = 30.5, Q3 = 34, Max = 38 O B. Min = 25, Q1 = 27.5, Q2 = 30.5, Q3 = 33.5, Max = 38 C....
A store owner surveyed 25 randomly selected customers and found the ages shown (in years). The mean is 32.36 and the standard deviation is 11.79. The owner wants to know f the mean age of all customers is 36 years old. Use the given information to complete parts a through . 14 12 18 22 16 42 48 44 28 40 41 3743 44 38 16 20 39 48 31 30 34 21 47 36 a) What is the null...
_ 9) In a sample of 10 randomly selected women, it was found that their mean height was 634 inches. From previous studies, it is assumed that the standard deviation, , 124 inches and that the population of height measurements is normally distributed a) Construct the confidence interval for the population mean height of women b) If the sample size was doubled to 20 women, what will be the effect on the confidence interval? 10) 10) The numbers of advertisements...
2 The data given below show the number of overtime hours worked in one week per employee. Use the data to complete parts (a) and (b) Overtime hours 1 3 4 5 6 Employees 8 13 29 57 43 28 18 (6) Construct a probability distribution b) Graph the probability distribution using a histogram and describe its shape (a) Construct the probability distribution by completing the table below. 1 2 3 4 5 0 PE (Round to three decimal places...
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