Do political science classes require less writing compared to history classes? The 44 randomly selected political science classes assigned an average of 15.39 pages of essay writing for the course. The standard deviation for these 44 classes was 2.47 pages. The 52 randomly selected history classes assigned an average of 19.87 pages of essay writing for the course. The standard deviation for these 52 classes was 3.16 pages. What can be concluded at the a= .01 level of significance? Let average 1 be the average number of pages of writing in the Political Science class. Round all answers to 4 places where possible. Step (1) Determine the null and alta

Q: he mean age of 30 randomly selected Republican Senators was 61 years 247 days old (61.675 years)…

A: given data, Democratic senatorsn1=30x¯1=61.704 yearss1=9.55republic senators n2=30x¯2=61.675…

Q: 37% UI WOTKers got thich you a) Express the null and alternative hypotheses in symbolic form for…

A: It is given that  Population proportion, p = 39% = 0.39 Sample size, n = 100 Favourable cases, X =…

Q: You wish to test the following claim (Ha) at a significance level of a = 0.005. Ho:μ = 69.4 Ha:>…

A: Given information Sample mean x̅ = 76.3 Population mean µ = 69.4 Sample size n = 28 Standard…

Q: You are testing the claim that having lights on at night increases weight gain (abstract). A sample…

A: Solution: First we find sample means and standard deviation.  x1=∑x1n1=67.3210=6.732…

Q: But how will I draw it month by month similar to the picture? Thanks.

A: R code for multiple bar chart: # OCTOCT=c(187136,90585,61159) # NOVNOV=c(198553,89072,57524) #…

Q: Telephone Calls A researcher knew that before cell phones, a person made on average 3.1 calls per…

A: Given n=26 Alpha=0.10 Standard deviation=0.6

Q: How do you interpret the confidence interval. Select all that apply. We are 95% confident that the…

A: Solution: Given that, sample size n=15, sample mean x¯=0.287 and standard deviation s=0.069 then…

Q: K Claim: The standard deviation of pulse rates of adult males is less than 10 bpm. For a random…

A: According to the given information in this question We need to identify the null and alternative…

Q: Course: Statistics - Lineal Regression Property brokers often need to know how appraisal of a…

A: Given: n = 10 α = 0.05 Formula Used: The equation of the regression line is: Y = a + bX b =…

Q: D Question 5 Consider the following data. 120, 120, 124, 125, 150, 165, 170, 175, 175, 175, 176,…

A: According to the given information in this question We need to find the value of mean

Q: It is believed that 11% of all Americans are left-handed. A college needs to know how many…

A: Solution: Given information: n = 210 Sample size  p= 0.11 Population proportion

Q: Decide whether the following results from a statistical study represent a sample statistic or a…

A: Solution: According to the guidelines we are answering first question if multiple questions are…

Q: (b) Kevin lives in a city that operates a bicycle hire scheme using a large number of bicycle…

A: Solution: Given that the pmf of X  x 0 1 2 3 4 5 6 P(X=x) 0.3 0.2 0.2 0.1 0.1 0.05 0.05…

Q: b) Fill in the missing values '*', *** ***** ***** and ***:

A: Solution: Given information: r=  3 number of rows  c= 5 number of column  n= 185 Total observation

Q: A psychologist would like to know whether the season (autumn, winter, spring, and summer) has any…

A:

Q: Problem 3) The random variable X has the following probability density function: fx(x) = {cx a) Find…

A: It is given that the random variable has the pdf fX(x) = { cx,   0 ≤ x ≤ 2        0,   otherwise }…

Q: Test the claim that the mean GPA of night students is larger than 2.7 at the 0.005 significance…

A: The claim is that the mean GPA of night students is larger than 2.7.

Q: Based on the tables and graphs below, interpret and report the results. You need to identify the…

A: From the above scatter plot, we can see that the data points are scattered from the lower left…

Q: we are informed that nails produced that are shorter than the minimum acceptable length have to be…

A: GivenThe mean length of nails is 5cmThe standard deviation of the length of nails is 0.16 cm. The…

Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…

A: Given info: A regression was run to determine if there is a relationship between hours of TV watched…

Q: hypothesis will be used to test that a population mean equals 6 against the alternative that the…

A: Explanation: Here given hypothesis mean equal value and significance level find out the critical…

Q: Perform the F test making sure to state the null and alternative hypothesis

A: Solution: Given information: n= 8 observation  k= 3 independent variables  MSR = 7954393 MSE= 925892…

Q: According to a 2009 Reader's Digest article, people throw away approximately 80% of what they buy at…

A:

Q: Fill in missing values *, **, *** and Test whether δ is significant. Give reasons for answer.

A: Solution: Given information: n=8 observation  k=3 independent variable

Q: Find the value of the test statistic. (Round your answer to two decimal places.)

A: Given information: M&M Kit kat Milky way 240 235 200 220 215 218 250 225 202 230 245…

Q: Is the true level of significance larger or smaller than .05?    Is the true critical value larger…

A: Is the true level of significance larger or smaller than .05 is

Q: How can the values in the Difference row of the table be interpreted? OA positive difference means…

A: Solution:  The paired (before - after) data is collected. Here we determine  the difference after -…

Q: Pricilla Phranklin opened her clothing store, Pricilla Phashions, in Downtown Dover a little over…

A: Given information: Month  Year 1 Demand Year 2 Demand Year 3 Demand January  186 217 212…

Q: You are testing the claim that the mean GPA of night students is different from the mean GPA of day…

A:

Q: Use two confidence intervals to compare the two players, when it comes to points per game. For 33…

A: Followings are the Explanation of the question  Use the t test of confidence interval because the…

Q: In an effort to counteract student cheating, the professor of a large class created four versions of…

A: Given Information: Group Sample size  Sample mean Standard variance Version A 76 157.1 426.4…

Q: Today, the waves are crashing onto the beach every 5 seconds. The times from when a person arrives…

A: Given,A random variable X~U(0,5)f(x)=15    ;  0≤X≤5

Q: Suppose a simple random sample of size N equals 150 is obtained from a population who size is N…

A: Given that n =150 , p=0.6

Q: ognitive psychologist studying motivation wants to determine if type of music has any effect on the…

A:

Q: In an unreplicated design with two levels each for four factors how many treatment are there?

A: The question is about design of experiment Given : No. of levels = 2 No. of factors for each level (…

Q: A researcher claims that exactly 40 % of all adults in the U.S. use their cell phone for most of…

A: The question is about hypo. testing and confidence interval Given : Popl. prop. of all adults use…

Q: Manipulate the data given to calculate any two probabilities?

A: Essay Quarrie Taylor Wilson Forbes 1 62 63 65 68 2 58 60 61 64 3 63 68 72 58 4 64 65 65 61…

Q: Listed below are the overhead widths​ (in cm) of seals measured from photographs and the weights​…

A: Followings are the explanation of the question Use the Excel and format the below table

Q: A poll asked 998 adults "If purchasing a used car made certain upgrades or features more affordable,…

A:

Q: Espano Total blood cholesterol level was measured for each of 10 adults. Here are the 10…

A: Data given  218,174,239,201,260,218,262,251,223,201

Q: A marriage counselor has traditionally seen that the proportion p of all married couples for whom…

A: From given data : p=0.79,x=198,n=235,α=0.05

Q: A pharmaceutical company claims that the average dose of the active ingredient of their pain killer…

A: Given: n = 26 s2 = 0.48 σ2 = 1.5 Formula Used: The upper confidence level = (n-1)s2χ1-α/22

Q: In a survey of 1,200 higher education students in the country, it was determined that 240 paid cash…

A: Given: Total number of higher education students in the country = 1200 Number of students paid cash…

Q: Find the positive critical value for testing Ho: = 14.22 versus Ha: 14.22 at significance level 0.1…

A: we have to find critical value  H0 : μ = 14.22Ha : μ ≠ 14.22α = 0.1n = 26

Q: You are given the following data: X = [1.5, 10.22, 2.4, 5.8, 0.43] What would you choose as the…

A: The values of x are given for which mean is µ. if model this as log normal distribution then it’s…

Q: A study to compare two insurance companies on length of stay for pediatric asthma patients randomly…

A: Given Information: Insurer A: Sample size n1=393 Sample mean x¯1=2.31 Sample standard deviation…

Q: "Trydint" bubble-gum company claims that 7 out of 10 people prefer their gum to "Eklypse". Test…

A: Given: The company claims that 7 out of 10 people prefer their gum to "Eklypse". Confidence level is…

Q: . Rini prefers red M&Ms over any other color. The Mars Company, makers of M&Ms, claims that 20% of…

A: Solution:  Let X be the  number of M&Ms red  from the bag.  The  probability of M&Ms red…

Q: You work for a marketing firm that has a large client in the automobile industry. You have been…

A: given data, E=0.04CI=0.90α=1-0.90=0.10Z- CRITICAL VALUE :Zc:=zα/2=Z0.10/2=Z0.05=1.645 [from excel…

Q: Problem 4) If X is a continuous uniform (-5, 5) random variable, find the following: a) What is the…

A: It is given that the continuous Uniform distribution with parameters a = -5 and b = 5 i.e, X ~ U(-5,…