# Analysis of Online Hours Based on Gender## IntroductionThis study investigates whether there is significant evidence at the 0.05 level of significance that the mean number of hours spent online per week is the same for both males and females on a specific social networking platform. It assumes unequal population variances between male and female groups.## Hypothesis Testing### Null Hypothesis (H₀)The mean number of hours spent online per week is the same for both males and females.\[ H_0: \mu_1 = \mu_2 \]### Alternative Hypothesis (H₁)The mean number of hours spent online per week is different for males and females.\[ H_1: \mu_1 \neq \mu_2 \]Here, population 1 refers to females and population 2 refers to males.## Steps to Compute1. **Compute the Test Statistic:** - Round to two decimal places.2. **Find the p-value:** - Round to three decimal places.3. **State the Conclusion:** - Compare the p-value to the chosen level of significance $\alpha$ = 0.05. - Determine whether to reject or fail to reject the null hypothesis. - Assess if there is evidence to conclude a difference in online hours between males and females.## Survey DataThe survey data table includes the gender and the number of hours spent online per week for each participant.| Gender | Hours Online/Week | Gender | Hours Online/Week ||--------|-------------------|--------|-------------------|| Female | 4 | Male | 7 || Female | 9 | Male | 15 || Female | 10 | Male | 6 || Female | 5 | Male | 4 || Female | 7 | Male | 6 || Female | 13 | Male | 3 || Female | 2 | Male | 9 || Female | 6 | Male | 4 || Female | 3 | Male | 6 || Female | 5 | Male | 8 || Female | 7 | Male | 5 || Female | 4 | Male | 4 || Female | 3 |

The data shows the number of hours spent online per week on a certain social networking website of…

Answered: The accompanying data gives the results…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A sample of 25 freshmen at a major university completed a survey that measured their degree of racial prejudice (the higher the score, the greater the prejudice) Compute the median and mean for these data? 10 43 30 30 45 40 12 40 42 35 45 25 10 33 50 42 32 38 11 47 22 26 37 38 10
A shopper at a local supermarket has spent these amounts in his last eight trips to the store: $32.92, 14.14, 30.80, 28.34, 75.58, 36.33, 33.51, and 22.94. Which statement about deleting the amount spent of $75.58 is false? a. The median of this data set may be more representative of the mean. b. The value of the mean would be reduced by $5.89. c. The value of the mean would not change. d. The value of the mean would be greatly reduced.
For the data represented by the Stem and Leaf diagram shown below, the Mean is equal to 68.275. The Median is 67.5, :(answer (True) or (False Stems 3 4 5 6 7 8 9 Leaves 689 7 01 02 135 5 6 7 3 4 4 5 6 7 X 9 5 8 9 679 0 0 0 1 0 1 3 5 5 899 False O True O
ryan has collected data on individual income (reported in dollars) and has not found any outliers. ryan wants to calculate the average income in his data. which measure of central tendency should he use? -mean -variance -mode -median
Suppose the mean miles per gallon for a sample of 70,000 new cars and light trucks sold in the United States in 2017 differs from the population mean by more than one gallon. How would you interpret this result?
A retail survey asked college students how much they planned to spend in various categories during the upcoming academic year. One category is the amount students planned to spend on school supplies. The data below show the amount of money students planned to spend on school supplies. 58, 60, 67, 69, 70, 73, 74, 77, 78, 80, 83, 84, 87, 89, 94, 96, 97, 100, 102, 105 USE SALT (a) Calculate the mean and median for the distribution of money students planned to spend on school supplies. mean median (b) What is the 75th percentile of the distribution? (c) Determine the five-number summary. minimum Q₁ median Q3 maximum
The chart below represents the number of inches of snow for a seven-day period. Sunday Monday Tuesday Wednesday Thursday Friday Saturday 2 5 3 10 0 4 2 Find the mean, median, and mode. Which is the best measure of central tendency? Remove Wednesday from the calculations. How does that impact the three measures of central tendency? Describe the effect outliers have on the measures of central tendency.
A courier company is reviewing their delivery times. The following descriptive statistics relates to this courier company. The mean time for package delivery is 5 hours, the first quartile is 4 hours, the third quartile is 17 hours. This means that 50% of deliveries take more than 5 hours. True or False
Data from the Office for National Statistics show that the mean age at which men in Great Britain get married was 33.5. A news reporter noted that this represents a continuation of the trend of waiting until a later age to wed. A new sample of 47 recently wed British men provided their age at the time of marriage. These data are contained in the Excel Online file below. Construct a spreadsheet to answer the following questions. Open spreadsheet Do these data indicate that the mean age of British men at the time of marriage exceeds the mean age in 2013? Test this hypothesis at a = 0.05. What is your conclusion? Use the obtained rounded values in your calculations. Sample mean: Sample standard deviation: t-value: p-value (Upper Tail): Because p-value > ✓ years (to 2 decimals) years (to 4 decimals) (to 3 decimals) (to 3 decimals) a = 0.05, we fail to reject ✔✔✔ Ho. There is insufficient ✔✔✔ evidence to conclude that the mean age at which British men get married exceeds what it was in…
The pH of a liquid is a measure of its acidity or alkalinity. Pure water has a pH of 7, which is neutral. Solutions with a pH less than 7 are acidic while solutions with a pH greater than 7 or basic or alkaline. A random sample of lakes in Florida was taken and the pH was recorded for each lake. Summary statistics are given below. The primary question to answer is: "Is there evidence to indicate the mean pH of lakes in Florida is different than the neutral value of 7?" min 01 median Q3 max mean sd n missing 3.6 5.8 6.8 7.4 9.1 6.5906 1.2884 53 A 95% confidence interval for the mean pH level of all lakes in Florida is to be constructed. Fill in the blanks below with the correct values in the formula for this problem. Report all values to three decimal places. Use R Studio or a calculator to obtain the critical value. (Note: report the t-critical value immediately after the +/- sign and the standard error in the last set of parentheses.) 土(
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