In a study of media use, each person in a large representative sample of male Canadian high school students was asked how much time they spent playing video or computer games (in minutes per day). Thesample mean was 123.2 minutes and the sample standard deviation was 117.7 minutes.USE SALT(a) Based on the given sample mean and standard deviation, do you think that it is reasonable to think that the distribution of time spent playing video or computer games for the population of maleCanadian high school students is approximately normal? Explain why or why not. (Round your answer to nearest percent.)If the distribution were approximately normal with the given mean and standard deviation, roughlyX % of the observed times would be negative. Therefore, it is notreasonable to think the distribution of time spent playing video or computer games for the population of male Canadian high school students is approximately normal.(b) Suppose you wanted to use the sample data to decide if there is evidence that the average time spent playing video or computer games for male Canadian high school students is greater than 2 hours(120 minutes). What would you need to know to determine if the one-sample t test is an appropriate method? (Select all that apply.)☐ We would need to know that the distribution of the population of times is approximately normal or that the sample size is large.We would need to know that all observations are dependent or all observations are independent.We would need to know that the sample was randomly selected or is representative of the population of male Canadian high school students.We would need to know that all male Canadian high school students were surveyed or the sample is representative of the population of male Canadian high school students.☐ We would need to know that the distribution of the population of times is approximately normal or that the sample size is small.

a. Explain whether it is acceptable to assume that the distribution of time spent playing video or…

Answered: (120 minutes). What would you need to…

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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We want to estimate the mean of a certain population, so we will collect a sample. Which should be true if we use a large sample rather than a small one?I. The distribution of our sample data will be approximately normal.II. The sampling distribution of the sample means will be approximately normal.III. The variability of the sample means will be smaller. only I I, II, and III only III only II II and III
cont.... What is the level of measurement for the dependent variable? Are the samples dependent (matched) or independent? State the null and alternative hypotheses.H0: HA:
Scenario: 200 people were asked, “Who is your favorite superhero?” Below are the data. Test the null hypothesis that the population frequencies for each category are equal. α= .05. Iron Man Black Panther Wonder Woman Spiderman fo = 40 fo = 60 fo =55 fo = 45 fe = fe = fe = fe = The correct APA format for the result would include
or each of the situations below, name the statistical test that you would use to analyze the data. It is possible that some test may be used more than once, or not at all. Options: one-sample z, two-sample z, one-sample independent-measures t, one-sample repeated-measures t,one-way independent-measures ANOVA, one-way repeated-measures ANOVA, two-way independent-measures ANOVA,Pearson correlation, Spearman correlation, point-biserial correlation, simple regression, multiple regression,chi-square for independence, chi-square for goodness-of-fit, binomial,Wilcoxon Rank Sums test, Wilcoxon Signed Rank T, Mann-Whitney U, Kruskal-Wallace H, Friedman chi-square 11. __________________________________________ An art professor is accused of showing favoritism to art majors in her courses. To defend her grading practices, the Dean compares the numbers of As, Bs, Cs, Ds, and Fs awarded to majors and minors, and finds that no favoritism exists.12. __________________________________________ Studies…
Scenario: 200 people were asked, “Who is your favorite superhero?” Below are the data. Test the null hypothesis that the population frequencies for each category are equal. α= .05. Iron Man Black Panther Wonder Woman Spiderman fo = 40 fo = 60 fo =55 fo = 45 fe = fe = fe = fe = What is the correct result based on the data?
If we want to compare average charges for males and females, we would use O two sample z- test O single sample t-test O Correlation OTwo sample t-test
The data show the number of hours of television watched per day by a sample of 28 people. Use technology to answer parts (a) and (b) below. 0 9 00 6 8 = 5 5 3 0 F3 4 3 4 -6 a. Find the data set's first, second, and third quartiles. Q₁ = Q₂ = Q3 (Type integers or decimals. Do not round.) 5 1 2 3 7 3 9 287 5 9 2 b. Draw a box-and-whisker plot that represents the data set. Choose the answer below. Note that different technologies will produce slightly different results. O A. B. 670 9 6 3 2 0 -co C. 0 3 6 -S 9 N
In the US, 46.2% of all people have type O blood, 39.1% have type A blood, 10.4% have type B blood and 4.3% have type AB blood. A researcher wants to see if the distribution of blood type is different for millionaires. The table below shows the results of a random sample of 3116 millionaires. What can be concluded at the a = 0.01 significance level? a. Complete the table by filling in the expected frequencies. Round to the nearest whole number: Frequencies of Blood Type Outcome Frequency Expected Frequency 1434 A 1224 В 310 AB 148 b. What is the correct statistical test to use? Select an answer V c. What are the null and alternative hypotheses? Но: O Blood type and income are independent. O The distribution of blood type for millionaires is not the same as it is for Americans in general. O The distribution of blood type for millionaires is the same as it is for Americans in general. O Blood type and income are dependent.
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A population of scores has a mean of µ=26, a median of 23 and a mode of 22. What is the most likely shape for the population distribution? A Symmetrical B Positively skewed C Negative skewed D It cannot be determined from the information given
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I need help with parts 2,3, and 6

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