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Historically, the time spent by DCSI3710 students on trying to certify any HLS homework is known...
Historically, the time spent by DCS13710 students on trying to certify any HLS homework is known...
Historically, the time spent by DCS13710 students on trying to certify any HLS homework is known to have a mean of 35 minutes. In order to examine the claim that homework 12.2 was actually more time consuming, an instructor asked 16 students how much time they spent on it. Assume that the p-value associated with the test statistic is 0.08. At a significance level of 0.1, what is the conclusion of the hypothesis test? Reject Ho because the p-value is...
An Internet provider is trying to gain advertising deals and claims that the mean time a...
An Internet provider is trying to gain advertising deals and claims that the mean time a customer spends online per day is greater than 35 minutes. You are asked to test this claim. (a) How would you write the null and alternative hypotheses if you represent the Internet provider and want to support the (b) How would you write the null and alternative hypotheses if you represent a competing advertiser and want to reject the claim? claim? (a) Ho 35...
A school administrator claimed that the average time spent on a school bus by those students...
A school administrator claimed that the average time spent on a school bus by those students in his school district who rode school buses was 35 minutes. A random sample of 20 students who did ride the school buses yielded an average of 42 minutes riding time with a standard deviation of 6.2 minutes. Does this sample of size 20 contain sufficient evidence to indicate that the mean riding time is greater than 35 minutes at the 5% level of...
An Internet provider is trying to gain advertising deals and claims that the mean time a...
An Internet provider is trying to gain advertising deals and claims that the mean time a customer spends online per day is greater than 49 minutes. You are asked to test this claim (a) How would you write the null and alternative hypotheses if you represent the Internet provider and want to support the claim? (b) How would you write the null and alternative hypotheses if you represent a competing advertiser and want to reject the claim? (a) Ho: 49...
(1 point) The time needed for college students to complete a certain paper-and-pencil maze follows a...
(1 point) The time needed for college students to complete a certain paper-and-pencil maze follows a normal distribution with a mean of 30 seconds and a standard deviation of 3.7 seconds. You wish to see if the mean time u is changed by vigorous exercise, so you have a group of 25 college students exercise vigorously for 30 minutes and then complete the maze. It takes them an average of x = 28 seconds to complete the maze. Use this...
1-2. A certain STAT 410 instructor claims that the time to complete a particular STAT 410...
1-2. A certain STAT 410 instructor claims that the time to complete a particular STAT 410 homework assignment is normally distributed with (unknown) mean u and standard deviation o= 7.2 minutes. A random sample of n= 81 students is obtained. 1. We wish to test Ho: u < 75 minutes vs. H1: u > 75 minutes. .. a) The average time to complete the homework assignment for the students in the sample was 76.2 minutes. Find the p-value. b) Find...
Facebook: A study showed that two years ago, the mean time spent per visit to Facebook...
Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 19.8 minutes. Assume the standard deviation is o=10.0 minutes. Suppose that a simple random sample of 101 visits was selected this year and has a sample mean of x = 22.8 minutes. A social scientist is interested to know whether the mean time of Facebook visits has increased. Use the a=0.10 level of significance and the critical value method with the table. Part:...
The technology committee at a college has stated that the average time spent by students per...
The technology committee at a college has stated that the average time spent by students per lab visit has increased, and the increase supports the need for increased lab fees. To substantiate this claim, the committee randomly samples 12 student lab visits and notes the amount of time spent using the computer. The times are given in the accompanying table. Complete parts (a) and (b) below. EClick the icon to view the table of lab times. a) Plot the data....
A recent national survey showed that the mean amount of time high school students spent per...
A recent national survey showed that the mean amount of time high school students spent per day using Snapchat was 65 minutes, with a standard deviation of 9 minutes. Mrs. Jones, a school principal, surveyed 100 of her students and computed a sample mean of 67.6 minutes of daily Snapchat use. She would like to determine, with a .01 significance level, whether her school is significantly different from the national results. State the null and alternate hypotheses for this two-tailed...
4. A random sample of 12 second-year university students enrolled in a business statistics course was...
4. A random sample of 12 second-year university students enrolled in a business statistics course was drawn. At the course's completion, each student was asked how many hours he or she spent doing homework in statistics. The data are listed below. It is known that the population standard deviation is o= 8.0. The instructor has recommended that students devote 3 hours per week for the duration of the 12-week semester, for a total of 36 hours. At 10% significance level...
Historically, the time spent by DCS13710 students on trying to certify any HLS homework is known to have a mean of 35 minutes. In order to examine the claim that homework 12.2 was actually more time consuming, an instructor asked 16 students how much time they spent on it. Assume that the p-value associated with the test statistic is 0.08. At a significance level of 0.1, what is the conclusion of the hypothesis test? Reject Ho because the p-value is...
An Internet provider is trying to gain advertising deals and claims that the mean time a customer spends online per day is greater than 35 minutes. You are asked to test this claim. (a) How would you write the null and alternative hypotheses if you represent the Internet provider and want to support the (b) How would you write the null and alternative hypotheses if you represent a competing advertiser and want to reject the claim? claim? (a) Ho 35...
A school administrator claimed that the average time spent on a school bus by those students in his school district who rode school buses was 35 minutes. A random sample of 20 students who did ride the school buses yielded an average of 42 minutes riding time with a standard deviation of 6.2 minutes. Does this sample of size 20 contain sufficient evidence to indicate that the mean riding time is greater than 35 minutes at the 5% level of...
An Internet provider is trying to gain advertising deals and claims that the mean time a customer spends online per day is greater than 49 minutes. You are asked to test this claim (a) How would you write the null and alternative hypotheses if you represent the Internet provider and want to support the claim? (b) How would you write the null and alternative hypotheses if you represent a competing advertiser and want to reject the claim? (a) Ho: 49...
(1 point) The time needed for college students to complete a certain paper-and-pencil maze follows a normal distribution with a mean of 30 seconds and a standard deviation of 3.7 seconds. You wish to see if the mean time u is changed by vigorous exercise, so you have a group of 25 college students exercise vigorously for 30 minutes and then complete the maze. It takes them an average of x = 28 seconds to complete the maze. Use this...
1-2. A certain STAT 410 instructor claims that the time to complete a particular STAT 410 homework assignment is normally distributed with (unknown) mean u and standard deviation o= 7.2 minutes. A random sample of n= 81 students is obtained. 1. We wish to test Ho: u < 75 minutes vs. H1: u > 75 minutes. .. a) The average time to complete the homework assignment for the students in the sample was 76.2 minutes. Find the p-value. b) Find...
Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 19.8 minutes. Assume the standard deviation is o=10.0 minutes. Suppose that a simple random sample of 101 visits was selected this year and has a sample mean of x = 22.8 minutes. A social scientist is interested to know whether the mean time of Facebook visits has increased. Use the a=0.10 level of significance and the critical value method with the table. Part:...
The technology committee at a college has stated that the average time spent by students per lab visit has increased, and the increase supports the need for increased lab fees. To substantiate this claim, the committee randomly samples 12 student lab visits and notes the amount of time spent using the computer. The times are given in the accompanying table. Complete parts (a) and (b) below. EClick the icon to view the table of lab times. a) Plot the data....
4. A random sample of 12 second-year university students enrolled in a business statistics course was drawn. At the course's completion, each student was asked how many hours he or she spent doing homework in statistics. The data are listed below. It is known that the population standard deviation is o= 8.0. The instructor has recommended that students devote 3 hours per week for the duration of the 12-week semester, for a total of 36 hours. At 10% significance level...
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