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4.E.011 A social scientist measures the number of minutes (per day) that a small hypothetical population...
A social scientist measures the number of minutes (per day) that a small hypothetical population of...
A social scientist measures the number of minutes (per day) that a small hypothetical population of college students spends online. Student Score Student Score A 84 F 92 B 37 G 87 C 92 H 95 D 61 I 96 E 87 J 74 (a) What is the range of data in this population? min (b) What is the IQR of data in this population? (c) What is the SIQR of data in this population? (d) What is the population...
A claim is made that the average college student spends 85 minutes per day on social...
A claim is made that the average college student spends 85 minutes per day on social media. Casey believes this claimed value is too low. He surveys a random sample of 115 college students, and they report spending an average of 90 minutes per day on social media, with a sample standard deviation of 19.5 minutes. When Casey computed his test statistic, he did so as follows: 2 -2.7 85-90 19.5 V115 What is wrong with Casey's computations? Instead of...
A random sample of 46 college students reported the number of hours per day they typically spend on social media. Their...
A random sample of 46 college students reported the number of hours per day they typically spend on social media. Their sample mean is, M = 2.61, and their standard deviation is, s = 1.02. If you plan to construct a 95% confidence interval for the population mean, what t critical value should you use based on this data?
A psychologist is interested in the social interactions of preschool children. She measures the number of...
A psychologist is interested in the social interactions of preschool children. She measures the number of verbal interactions that each child at a preschool engages in during a day. The frequency distribution of the data is listed in the table below. Class Interval Frequency 6 - 15 1 16 - 25 2 26 - 35 3 36 - 45 3 46 - 55 4 56 - 65 10 66 - 75 7 76 - 85 6 86 - 95 4...
1) Answer the question True or False. 1) Nonparametric methods focus on the location of the...
1) Answer the question True or False. 1) Nonparametric methods focus on the location of the probability distribution, rather than on specific parameters of the population. A) True B) False 2) Nonparametric tests are useful for qualitative data that can be ranked. A) True B) False 3) The sign test provides inferences about the population median rather than the population mean. A) True B) False 4) For a sign test to be valid, a large sample must be selected from...
2.Heights of the Highest Waterfalls The heights in feet) of the 20 highest waterfalls in the...
2.Heights of the Highest Waterfalls The heights in feet) of the 20 highest waterfalls in the world are shown here. (Note: The height of Niagara Falls is 182 feet!) below. Based on these data, what do you think of the claim that the average expenditure per pupil in the United States exceeds $10,000? a 94222 b 8988 3212 2800 2625 2540 2499 2425 2307 2151 2123 2000 1904 1841 1650 1612 1536 1388 1215 1198 1182 1170 Source: New York...
Chapter 1 Question#1 (9 points) The following temperatures and weather conditions were reported for a particular...
Chapter 1 Question#1 (9 points) The following temperatures and weather conditions were reported for a particular summer day Highl-Low T condition 92 City Chicago Dallas-Ft.Worth clear 89 72cloudy clear Honolulu Los Angeles 70 80 New York City90 69 a. How many elements are in the above data set? b. How many variables are in this data set? c. Which variables are categorical, and which are quantitative variables? d. What percentage of the cities had clear weather conditions? rain Question #19...
TEST 1: ANSWERS INTS EACH). This section takes around 5 minutes. Name Spring 2019 8) A researcher wants to determine whether female teachers give higher or lower grades, on average, then male t...
TEST 1: ANSWERS INTS EACH). This section takes around 5 minutes. Name Spring 2019 8) A researcher wants to determine whether female teachers give higher or lower grades, on average, then male teachers. She picks a random sample by picking a random sample of schools, in the schools picked, picking a random sample of departments, and in the departments picked, picking a random sample of teachers. What kind of sampling was performed? d) voluntary response e) cluster b) stratified Random...
i need help on question 3 to 22 please. Midterm ex review. MATH 101 Use the...
i need help on question 3 to 22 please.
Midterm ex review. MATH 101 Use the following information to answer the next four exercises. The midterm grades on a chemistry exam, graded on a scale of 0 to 100, were: 62, 64, 65, 65, 68, 70, 72, 72, 74, 75, 75, 75, 76,78, 78, 81, 82, 83, 84, 85, 87, 88, 92, 95, 98, 98, 100, 100,740 1. Do you see any outliers in this data? If so, how would...
Is it reasonable to claim that the average number of observed tornadoes per year is different...
Is it reasonable to claim that the average number of observed tornadoes per year is different from the average number of tornado related deaths per year? 5. What test/procedure did you perform? a. One-sided t-test b. Two-sided t-test c. Regression d. Confidence interval 6. What is the P-Value/margin of error? a. 0.007034504 b. 0.34922 c. 4.07497E-24 d. 2.03749E-24 e. None of these 7. Statistical Interpretation a. Since P-value is very small we are confident that the number of tornadoes will...
A claim is made that the average college student spends 85 minutes per day on social media. Casey believes this claimed value is too low. He surveys a random sample of 115 college students, and they report spending an average of 90 minutes per day on social media, with a sample standard deviation of 19.5 minutes. When Casey computed his test statistic, he did so as follows: 2 -2.7 85-90 19.5 V115 What is wrong with Casey's computations? Instead of...
1) Answer the question True or False. 1) Nonparametric methods focus on the location of the probability distribution, rather than on specific parameters of the population. A) True B) False 2) Nonparametric tests are useful for qualitative data that can be ranked. A) True B) False 3) The sign test provides inferences about the population median rather than the population mean. A) True B) False 4) For a sign test to be valid, a large sample must be selected from...
2.Heights of the Highest Waterfalls The heights in feet) of the 20 highest waterfalls in the world are shown here. (Note: The height of Niagara Falls is 182 feet!) below. Based on these data, what do you think of the claim that the average expenditure per pupil in the United States exceeds $10,000? a 94222 b 8988 3212 2800 2625 2540 2499 2425 2307 2151 2123 2000 1904 1841 1650 1612 1536 1388 1215 1198 1182 1170 Source: New York...
Chapter 1 Question#1 (9 points) The following temperatures and weather conditions were reported for a particular summer day Highl-Low T condition 92 City Chicago Dallas-Ft.Worth clear 89 72cloudy clear Honolulu Los Angeles 70 80 New York City90 69 a. How many elements are in the above data set? b. How many variables are in this data set? c. Which variables are categorical, and which are quantitative variables? d. What percentage of the cities had clear weather conditions? rain Question #19...
TEST 1: ANSWERS INTS EACH). This section takes around 5 minutes. Name Spring 2019 8) A researcher wants to determine whether female teachers give higher or lower grades, on average, then male teachers. She picks a random sample by picking a random sample of schools, in the schools picked, picking a random sample of departments, and in the departments picked, picking a random sample of teachers. What kind of sampling was performed? d) voluntary response e) cluster b) stratified Random...
i need help on question 3 to 22 please.
Midterm ex review. MATH 101 Use the following information to answer the next four exercises. The midterm grades on a chemistry exam, graded on a scale of 0 to 100, were: 62, 64, 65, 65, 68, 70, 72, 72, 74, 75, 75, 75, 76,78, 78, 81, 82, 83, 84, 85, 87, 88, 92, 95, 98, 98, 100, 100,740 1. Do you see any outliers in this data? If so, how would...
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