Internet Visits
Homework Answers
The test hypothesis is
Ho:μ=36
Ha:μ not equal to 36
The test statistic is
Z=(xbar-μ)/(s/√n)
=(42.1-36)/(5.3/sqrt(24))
=5.64
Given a=0.01, the critical value is |Z(0.005)|=2.58 (check standard normal table)
Since Z=5.64 is larger than 2.58, we reject Ho.
A U.S. Web Usage Snapshot indicated a monthly average of 36 Internet visits per user from...
A U.S. Web Usage Snapshot indicated a monthly average of 36 Internet visits per user from home. A random sample of 24 Internet users yielded a sample mean of 42.1 visits with a standard deviation of 5.3. At the 0.01 level of significance, can it be concluded that this differs from the national average? Step 1: State hypotheses by filling in the symbol (=, <, >, or not equal) and the population mean: Ho: μ Blank H1: μ Blank Step...
0.05 level of signileai 3.2 movies. At the concluded that this represents a difference from national...
0.05 level of signileai 3.2 movies. At the concluded that this represents a difference from national average? Source: MPAA Study the 5. Nonparental Care According to the Digest of Educa- tional Statistics, a certain group of preschool children under the age of one year each spends an average of 30.9 hours per week in nonparental care. A study of state university center-based programs indicated that a random sample of 32 infants spent an average of 32.1 hours per week in...
Example 8.26·#17 The average movie ticket in 2010 cost $789. A random sample of 15 movie tickets ...
Example 8.26·#17 The average movie ticket in 2010 cost $789. A random sample of 15 movie tickets from the suburbs of a large U.S. city indicated that the mean cost was $11.09 with a standard deviation of $4.86. At the 0.01 level of significance, can it be concluded that the mean is higher than the national average? Givens n-and df- Solution Step 1 State the null and alternative hypothesis Ho : μ Step 2. 167 Step 3 stat-test→ #21 test...
According to the National Association of Home Builders, the average cost of building a home in...
According to the National Association of Home Builders, the average cost of building a home in the Northeast is $117.91 per square foot. A random sample of 38 new homes indicated that the mean cost was $123.87 and the standard deviation was $17. Can it be concluded that the mean cost differs from $117.91, using the 0.10 level of significance? Part 1 State the hypotheses and identify the claim with the correct hypothesis. H M - $ 117.91 not claim...
According to CNN, 55% of all u.S. smartphone users have used their gPS capability to get...
According to CNN, 55% of all u.S. smartphone users have used their gPS capability to get directions (CNN.com, May 2016). Suppose a provider of wireless telephone service in Canada wants to know if gPS usage by its customers differs from u.S. smartphone users. The company collects usage records for this year for a random sample of 547,192 of its customers and determines that 302,050 of these customers have used their telephone’s gPS capability this year. use this information to test...
The average monthly cell phone bill was reported to be $73.00 by the U.S. Wireless Industry....
The average monthly cell phone bill was reported to be $73.00 by the U.S. Wireless Industry. A random sampling of ten large cell phone company found the following monthly cell phone charges yields a sample mean of $78.47 with a population standard deviation of $7.41. At the 0.05 level of significance, can it be concluded that the average monthly cell phone bill differs from $73.00? Question 24 (2.63 points) Which test are you running? One mean z-test Chi-Square Goodness of...
QUESTION 20 A national poll reported that 58% of those with Internet access have made purchases...
QUESTION 20 A national poll reported that 58% of those with Internet access have made purchases on investigate whether this percentage applies to its own state, a legislator commissions a study. A random sample of 400 state residents who have Internet access is taken. Of those 400 respondents, 215 said that they have made purchases online. Does this sample provide sufficient evidence to conclude that the state differs from the nation with respect to making purchases online? Conduct the hypothesis...
1) More time on the Internet: A researcher polled a sample of 1052 adults in the...
1) More time on the Internet: A researcher polled a sample of 1052 adults in the year 2010, asking them how many hours per week they spent on the Internet. The sample mean was 10.19 with a standard deviation of 13.81. A second sample of 2022 adults was taken in the year 2012. For this sample, the mean was 10.87 with a standard deviation of 14.92. Assume these are simple random samples from populations of adults. a) State the null...
Next Previous 3 4 5 6 Question 2 of 6 (1 point) View problem in a pop-up According to the National Association of Home Builders, the average cost of building a home in the Northeast is $117.91...
Next Previous 3 4 5 6 Question 2 of 6 (1 point) View problem in a pop-up According to the National Association of Home Builders, the average cost of building a home in the Northeast is $117.91 per square foot. A random sample of 37 new homes indicated that the mean cost was $121.14 and the standard deviation was $20. Can it be concluded that the mean Fo cost differs from $117.91, using the 0.10 level of significance? Use thP...
The average number of hours that Canadians spend on the internet at home has been 100...
The average number of hours that Canadians spend on the internet at home has been 100 hours per month for several years. In early March of 2020, as more people were starting to work and study at home, a random sample of 25 households found a mean of 104 hours with a sample standard deviation of 10 hours. The population standard deviation is unknown. Assume that hours spent on the internet are approximately normally distributed. Is there enough evidence to...
0.05 level of signileai 3.2 movies. At the concluded that this represents a difference from national average? Source: MPAA Study the 5. Nonparental Care According to the Digest of Educa- tional Statistics, a certain group of preschool children under the age of one year each spends an average of 30.9 hours per week in nonparental care. A study of state university center-based programs indicated that a random sample of 32 infants spent an average of 32.1 hours per week in...
Example 8.26·#17 The average movie ticket in 2010 cost $789. A random sample of 15 movie tickets from the suburbs of a large U.S. city indicated that the mean cost was $11.09 with a standard deviation of $4.86. At the 0.01 level of significance, can it be concluded that the mean is higher than the national average? Givens n-and df- Solution Step 1 State the null and alternative hypothesis Ho : μ Step 2. 167 Step 3 stat-test→ #21 test...
According to the National Association of Home Builders, the average cost of building a home in the Northeast is $117.91 per square foot. A random sample of 38 new homes indicated that the mean cost was $123.87 and the standard deviation was $17. Can it be concluded that the mean cost differs from $117.91, using the 0.10 level of significance? Part 1 State the hypotheses and identify the claim with the correct hypothesis. H M - $ 117.91 not claim...
The average monthly cell phone bill was reported to be $73.00 by the U.S. Wireless Industry. A random sampling of ten large cell phone company found the following monthly cell phone charges yields a sample mean of $78.47 with a population standard deviation of $7.41. At the 0.05 level of significance, can it be concluded that the average monthly cell phone bill differs from $73.00? Question 24 (2.63 points) Which test are you running? One mean z-test Chi-Square Goodness of...
QUESTION 20 A national poll reported that 58% of those with Internet access have made purchases on investigate whether this percentage applies to its own state, a legislator commissions a study. A random sample of 400 state residents who have Internet access is taken. Of those 400 respondents, 215 said that they have made purchases online. Does this sample provide sufficient evidence to conclude that the state differs from the nation with respect to making purchases online? Conduct the hypothesis...
1) More time on the Internet: A researcher polled a sample of 1052 adults in the year 2010, asking them how many hours per week they spent on the Internet. The sample mean was 10.19 with a standard deviation of 13.81. A second sample of 2022 adults was taken in the year 2012. For this sample, the mean was 10.87 with a standard deviation of 14.92. Assume these are simple random samples from populations of adults. a) State the null...
Next Previous 3 4 5 6 Question 2 of 6 (1 point) View problem in a pop-up According to the National Association of Home Builders, the average cost of building a home in the Northeast is $117.91 per square foot. A random sample of 37 new homes indicated that the mean cost was $121.14 and the standard deviation was $20. Can it be concluded that the mean Fo cost differs from $117.91, using the 0.10 level of significance? Use thP...
The average number of hours that Canadians spend on the internet at home has been 100 hours per month for several years. In early March of 2020, as more people were starting to work and study at home, a random sample of 25 households found a mean of 104 hours with a sample standard deviation of 10 hours. The population standard deviation is unknown. Assume that hours spent on the internet are approximately normally distributed. Is there enough evidence to...
Most questions answered within 3 hours.
-
Phosphorous + bromine = phosphorous tribromide. If 35.0 g of
bromine are reacted and 27.9 grams...
asked 57 minutes ago -
Derive the long wavelength limit of the Planck energy density
distribution
asked 47 minutes ago -
Calculate the pH of each of the following solutions.
0.50 M HBr
3.1×10−4 M KOH
4.2×10−5...
asked 4 hours ago -
For the year ended December 31, Depot Max’s cost of merchandise
sold was $85,600. Inventory at the...
asked 4 hours ago -
Week 10 - Professional Memo Assignment
Professional Memo Assignment
Your mission for this week, should you...
asked 4 hours ago -
Write a Python program that stores the data for each
player on the team, and it...
asked 4 hours ago -
In
the last 3 months, mike never knows when he is going to get his
allowance...
asked 5 hours ago -
Is Ca(OH)2 a Bronsted base, Lewis base, or both? Why?
asked 4 hours ago -
1A- Why don’t voters complain about U.S. tariffs on imported
sugar?
Because sugar is only a...
asked 5 hours ago -
Cash Payback Period
Primera Banco is evaluating two capital investment proposals for
a drive-up ATM kiosk,...
asked 5 hours ago -
Create a button in Swift (Xcode) that will create a charge,
create a charge using Stripe's...
asked 5 hours ago -
The reaction rate of CO and NO2 in the reaction
CO(g) + NO2(g) → CO2(g) +...
asked 5 hours ago