Suppose one person out of a survey of 20 people said that he sleeps 18 hours...
Suppose one person out of a survey of 20 people said that he sleeps 18 hours at night. This value is an outlier. How would this affect the mean for the number of hours slept at night?
Homework Answers
This would shift the mean for number of hours slept at night to upper side that is mean would shift towards right.
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Suppose one person out of a survey of 20 people said that he
sleeps 18 hours...
1. In a survey of 50 people, 25 said they read the Forum and 16 said...
1. In a survey of 50 people, 25 said they read the Forum and 16 said they listened to the news on NPR. Five of the responders said they read the Forum and listened to the news on NPR. If one of the 50 survey respondents is randomly selected, find the probability that the person read neither the Forum nor listened to NPR? 2. In a survey of 50 people, 25 said they read only the traditional paper form of...
Jacob was researching the number of hours the average adult sleeps each night. He collected data...
Jacob was researching the number of hours the average adult sleeps each night. He collected data from five individuals: Subject #1: 6 hours Subject #2: 6.5 hours Subject #3: 6 hours Subject #4:7.5 hours Subject #5: 5 hours Using the data above, what is the standard error of the sample mean? Answer choices are rounded to the hundredths place. a.) 0.74 b.) 0.15 c.) 0.41 d.) 6.10
The results of a national survey showed that on average, adults sleep 6.7 hours per night....
The results of a national survey showed that on average, adults sleep 6.7 hours per night. Suppose that the standard deviation is 1.9 hours and that the number of hours of sleep follows a bell-shaped distribution. If needed, round your answers to two decimal digits. (a) Use the empirical rule to calculate the percentage of individuals who sleep between 2.9 and 10.5 hours per day. Enter your answer as a percentage. (b) What is the z-value for an adult who...
Sleeping outlier: A simple random sample of eight college freshmen were asked how many hours of...
Sleeping outlier: A simple random sample of eight college freshmen were asked how many hours of sleep they typically got per night. The results were 24 6 8.5 8 8.5 7.5 6.5 9 Send data to Excel Notice that one joker said that he sleeps 24 a day. Part: 0/ 3 Part 1 of 3 (a) The data contain an outlier that is clearly a mistake. Eliminate the outlier, then construct a 90 % confidence interval for the mean amount...
The results of a national survey showed that on average, adults sleep 6.6 hours per night....
The results of a national survey showed that on average, adults sleep 6.6 hours per night. Suppose that the standard deviation is 1 hour and that the number of hours of sleep follows a bell-shaped distribution. If needed, round your answers to two decimal digits. If your answer is negative use "minus sign". (a) Use the empirical rule to calculate the percentage of individuals who sleep between 4.6 and 8.6 hours per day. Enter your answer as a percentage. (b)...
Q8: New York is known as "the city that never sleeps". Suppose the amount of sleep (in hours) is ...
ONLY a and b at the end
Q8: New York is known as "the city that never sleeps". Suppose the amount of sleep (in hours) is nearly normal. A random sample of 25 New Yorkers were asked how much sleep they get per night. Statistical summaries of these data are shown below. Do these data provide strong evidence that New Yorkers sleep less than 8 hours a night on average? Assume the significant level is α-0.05. in max 257.73 0.77...
A sociologist studying freshmen carried out a survey, asking, among other questions, how often students went...
A sociologist studying freshmen carried out a survey, asking, among other questions, how often students went out per week, how many hours they studied per day, and how many hours they slept at night. The tables provide the answers on the time slept and the time spent studying by whether or not students went out. Go out Hours/day studied Hours slept less than 6 Hours slept 6 or more Total Stay in dorm Hours/day studied Hours slept less than...
Suppose a survey of 36 people determined that the sample mean time spent on the internet...
Suppose a survey of 36 people determined that the sample mean time spent on the internet was 8.2 hours with a sample standard deviation of 9.8 hours. What is the critical value for a 95% confidence interval? Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 7 is entered as 7.00, 3.5 is entered as 3.50, 0.3750 is entered as 0.38 | | Suppose a survey of 36 people determined that the sample...
The recommended number of hours of sleep per night is 8 hours, but everybody knows that...
The recommended number of hours of sleep per night is 8 hours, but everybody knows that the average college student sleeps less than 7 hours. The number of hours slept last night by 10 randomly selected college students is listed below. Complete the following hypothesis test: He: -7,<7, = 0.05. 6.2 7.5 6.6 5.7 6.1 6.1 7.2 6.1 7.3 6.5 (a) Find t. (Give your answer correct to two decimal places.) (11) Find the p-value. (Give your answer correct to...
CULINO Stooping ouurer: simple random sample or ugne college Tres night. The results were were asked...
CULINO Stooping ouurer: simple random sample or ugne college Tres night. The results were were asked how many hours or steep they wypically goc per 8.5 24 BO 8 7.5 9 6.5 6 Send date to Excel Notice that one joker said that he sleeps 24 hours a day. Part 1 of 3 The data contain an outlier that is clearly a mistake. Eliminate the outlier, then construct a 99% confidence interval for the mean amount of sleep from the...
1. In a survey of 50 people, 25 said they read the Forum and 16 said they listened to the news on NPR. Five of the responders said they read the Forum and listened to the news on NPR. If one of the 50 survey respondents is randomly selected, find the probability that the person read neither the Forum nor listened to NPR? 2. In a survey of 50 people, 25 said they read only the traditional paper form of...
Jacob was researching the number of hours the average adult sleeps each night. He collected data from five individuals: Subject #1: 6 hours Subject #2: 6.5 hours Subject #3: 6 hours Subject #4:7.5 hours Subject #5: 5 hours Using the data above, what is the standard error of the sample mean? Answer choices are rounded to the hundredths place. a.) 0.74 b.) 0.15 c.) 0.41 d.) 6.10
Sleeping outlier: A simple random sample of eight college freshmen were asked how many hours of sleep they typically got per night. The results were 24 6 8.5 8 8.5 7.5 6.5 9 Send data to Excel Notice that one joker said that he sleeps 24 a day. Part: 0/ 3 Part 1 of 3 (a) The data contain an outlier that is clearly a mistake. Eliminate the outlier, then construct a 90 % confidence interval for the mean amount...
The results of a national survey showed that on average, adults sleep 6.6 hours per night. Suppose that the standard deviation is 1 hour and that the number of hours of sleep follows a bell-shaped distribution. If needed, round your answers to two decimal digits. If your answer is negative use "minus sign". (a) Use the empirical rule to calculate the percentage of individuals who sleep between 4.6 and 8.6 hours per day. Enter your answer as a percentage. (b)...
ONLY a and b at the end
Q8: New York is known as "the city that never sleeps". Suppose the amount of sleep (in hours) is nearly normal. A random sample of 25 New Yorkers were asked how much sleep they get per night. Statistical summaries of these data are shown below. Do these data provide strong evidence that New Yorkers sleep less than 8 hours a night on average? Assume the significant level is α-0.05. in max 257.73 0.77...
The recommended number of hours of sleep per night is 8 hours, but everybody knows that the average college student sleeps less than 7 hours. The number of hours slept last night by 10 randomly selected college students is listed below. Complete the following hypothesis test: He: -7,<7, = 0.05. 6.2 7.5 6.6 5.7 6.1 6.1 7.2 6.1 7.3 6.5 (a) Find t. (Give your answer correct to two decimal places.) (11) Find the p-value. (Give your answer correct to...
CULINO Stooping ouurer: simple random sample or ugne college Tres night. The results were were asked how many hours or steep they wypically goc per 8.5 24 BO 8 7.5 9 6.5 6 Send date to Excel Notice that one joker said that he sleeps 24 hours a day. Part 1 of 3 The data contain an outlier that is clearly a mistake. Eliminate the outlier, then construct a 99% confidence interval for the mean amount of sleep from the...
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