in 1965 a nationwide survey revealed that u.s. grade school children spent an average of 8.4...
in 1965 a nationwide survey revealed that u.s. grade school
children spent an average of 8.4 hours per week doing homework.
assume the distribution of homework times is normal. last year a
sample of students were given the same survey. for this sample, the
average number of homework hours was 7.5 hours with a standard
deviation of 2.3 hours. do these data indicate a decrease in the
amount of homework hours for American grade school children? let
=0.10. show all seven steps.
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in 1965 a nationwide survey revealed that u.s. grade school
children spent an average of 8.4...
In a study relating college grade point average to time spent in various activities, you distribute a survey to several students.
In a study relating college grade point average to time spent in various activities, you distribute a survey to several students. The students are asked how many hours they spend
each week in four activities: studying, sleeping, working, and leisure. Any activity is put
into one of the four categories, so that for each student, the sum of hours in the four activities must be 168
A researcher wished to compare the average amount of time spent in extracurricular activities by high...
A researcher wished to compare the average amount of time spent in extracurricular activities by high school students in a suburban school district with that in a school district of a large city. The researcher obtained a simple random sample of 60 high school students in a large suburban school district and found the mean time spent in extracurricular activities per week to be 6 hours with a standard deviation of 3 hours. The researcher also obtained an independent simple...
PSY 3200 Unit 84 AS: Hypothesls Testing for Distribution of Means In this assignment studlents will...
PSY 3200 Unit 84 AS: Hypothesls Testing for Distribution of Means In this assignment studlents will demonstrate thelr understanding of the distribution of means doing all steps of hypothesls testing. For eadh probiem students will write out all steps of hypothesis testing indluding populations, hypotheses, outoff scores, and all relevant calculations. Assignments will be typed and uploaded in a word document to blackboard 1. A nationwide survey in 1995 revealed that U.S grade-school children spend an average of u R4hars...
2. . In a study relating college grade point average (GPA) to time spent in various...
2. . In a study relating college grade point average (GPA) to time spent in various activities, you distribute a survey to several students. The students are asked how many hours they spend each week in four activities: studying, sleeping, working, and leisure. Any activity is put into one of the four categories, so that for each student, the sum of hours in the four activities must be 168. Based on the study, you set an econometric model: GPA P+study+B,sleep+,work+B,leisure+...
Question 8 (1 point) A survey among freshmen at a certain university revealed that the number...
Question 8 (1 point) A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 25 and standard deviation 15. A sample of 36 students was selected. What is the probability that the average time spent studying for the sample was between 28.7 and 30 hours studying? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write...
1. The average amount parents and children spent per child on back-to-school clothes in Autumn 2010...
1. The average amount parents and children spent per child on back-to-school clothes in Autumn 2010 was $527. Assume the standard deviation is $160 and that the amount spent is normally distributed. What is the probability that the amount spent on a randomly selected child is more than $700? (Round to four decimal places) What is the probability that the amount spent on a randomly selected child is less than $100? (Round to four decimal places) What is the probability...
Example: Alcohol abuse is a serious health problem on college campuses. A nationwide survey of student...
Example: Alcohol abuse is a serious health problem on college campuses. A nationwide survey of student at 140 four-year colleges in the U.S. defined "frequent binge drinking" as "having five or more drinks in a row three or more times in the past two week period." of the 17,096 students surveyed, 3,314 met this criterion. Assume the data represent a SRS of 4-year colleges (Wechsler. 1994; Moore & McCabe, 2006, p. 537). Calculate the prevalence of frequent binge drinking. Include...
please explain by steps! very confused 10) The average charitable contribution itemized per income tax return...
please explain by steps! very confused
10) The average charitable contribution itemized per income tax return in Pennsylvania is $792. Suppose that the distribution of contributions is normal with a standard deviation of $103. Find the limits for the middle 60% of contributions. 4:02 < Back Assignment Details STAT-10-06534 The Normal Approximation to the Binomial 11) According to American Airlines, Flight 215 from Orlando to Los Angeles is on time 90% of the time. Randomly select 150 flights and use...
It is known that time spent partying per month by Kent State students is normal with...
It is known that time spent partying per month by Kent State students is normal with a mean of 46 hrs and standard deviation of 4 hrs. What is the probability that a randomly chosen Kent State student spends more than 49 hours partying per month? 1. 0 2. 0.0668 3. 0.8535 What is the probability that a randomly selected Kent State student spends less that 40 hours partying per month? 4. 0.2266 For which one of the following sets...
In an August 2012 Gallup survey of 1,012 randomly selected U.S. adults (age 18 and over), 53% said that they were dissatisfied with the quality of education students receive in kindergarten through grade 12. The bootstrap distribution (based on 5,000 samp
1. In an August 2012 Gallup survey of 1,012 randomly selected U.S. adults (age 18 and over), 53% said that they were dissatisfied with the quality of education students receive in kindergarten through grade 12. The bootstrap distribution (based on 5,000 samples) is provided. a). Would it be appropriate to use the normal distribution to construct the confidence interval in this situation? Explain briefly. b). The standard error from the bootstrap distribution is SE = 0.016. Use the normal distribution...
A researcher wished to compare the average amount of time spent in extracurricular activities by high school students in a suburban school district with that in a school district of a large city. The researcher obtained a simple random sample of 60 high school students in a large suburban school district and found the mean time spent in extracurricular activities per week to be 6 hours with a standard deviation of 3 hours. The researcher also obtained an independent simple...
PSY 3200 Unit 84 AS: Hypothesls Testing for Distribution of Means In this assignment studlents will demonstrate thelr understanding of the distribution of means doing all steps of hypothesls testing. For eadh probiem students will write out all steps of hypothesis testing indluding populations, hypotheses, outoff scores, and all relevant calculations. Assignments will be typed and uploaded in a word document to blackboard 1. A nationwide survey in 1995 revealed that U.S grade-school children spend an average of u R4hars...
2. . In a study relating college grade point average (GPA) to time spent in various activities, you distribute a survey to several students. The students are asked how many hours they spend each week in four activities: studying, sleeping, working, and leisure. Any activity is put into one of the four categories, so that for each student, the sum of hours in the four activities must be 168. Based on the study, you set an econometric model: GPA P+study+B,sleep+,work+B,leisure+...
Question 8 (1 point) A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 25 and standard deviation 15. A sample of 36 students was selected. What is the probability that the average time spent studying for the sample was between 28.7 and 30 hours studying? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write...
Example: Alcohol abuse is a serious health problem on college campuses. A nationwide survey of student at 140 four-year colleges in the U.S. defined "frequent binge drinking" as "having five or more drinks in a row three or more times in the past two week period." of the 17,096 students surveyed, 3,314 met this criterion. Assume the data represent a SRS of 4-year colleges (Wechsler. 1994; Moore & McCabe, 2006, p. 537). Calculate the prevalence of frequent binge drinking. Include...
please explain by steps! very confused
10) The average charitable contribution itemized per income tax return in Pennsylvania is $792. Suppose that the distribution of contributions is normal with a standard deviation of $103. Find the limits for the middle 60% of contributions. 4:02 < Back Assignment Details STAT-10-06534 The Normal Approximation to the Binomial 11) According to American Airlines, Flight 215 from Orlando to Los Angeles is on time 90% of the time. Randomly select 150 flights and use...
It is known that time spent partying per month by Kent State students is normal with a mean of 46 hrs and standard deviation of 4 hrs. What is the probability that a randomly chosen Kent State student spends more than 49 hours partying per month? 1. 0 2. 0.0668 3. 0.8535 What is the probability that a randomly selected Kent State student spends less that 40 hours partying per month? 4. 0.2266 For which one of the following sets...
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