Do political science classes require less writing than history classes? The 50 randomly selected political science classes assigned an average of 12.5 pages of essay writing for the course. The standard deviation for these 50 classes was 5.4 pages. The 47 randomly selected history classes assigned an average of 13.6 pages of essay writing for the course. The standard deviation for these 47 classes was 4.9 pages. What can be concluded at the a = 0.05 level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Но: Select an answer > Select an answer Select an answer H1: Select an answer > Select an answer Select an answer b. The test statistic ? O (please show your answer to 3 decimal places.) с. The p-valuе - (Please show your answer to 4 decimal places.)

Q: What percent of the total population is found between the mean and the z-score given? (Use the…

A: Solution

Q: Newly purchased automobile tires of a certain type are supposed to be filled to a pressure of 30…

A: The random variable X follows normal distribution. We have to find the p-value for each of the…

Q: A researcher is interested in finding a 98% confidence interval for the mean number minutes students…

A: Givensample size(n)=41Mean(x)=36.5standard deviation(s)=11.6confidence interval = 98%

Q: The Denver Post stated that 80% of all new products introduced in grocery stores are taken off the…

A:

Q: 19. If there was a bigger mean difference between the strength group and the walking group, e.g., an…

A: Given that  Sample sizes n1=14 , n2=28 M1=15 , M2=12 SP2=14

Q: (a) Show that the joint pdf for U, V is of the form f(z, y) = {2 exp(-u-v), if (u, v) E A otherwise…

A: The Jacobian method of transformation will b3 used to determine the joint pdf of U and V.

Q: . The weights of ice cream cartons are normally distributed with a mean weight of 13 ounces and a…

A:

Q: The actual time it takes to cook a ten-pound turkey is normally distributed. Suppose that a random…

A: The summary of statistics is, x¯=2.9,s=0.24,n=19 The degree of freedom is, df=n-1   =19-1   =18…

Q: g function: One of the measurements used to determine the health of a person's lungs is the amount…

A: We have given that,  Population mean (μ) = 2.1, population standard deviation (σ) = 0.4, sample size…

Q: The spinner below is spun twice. If the spinner lands on a border, that spin does not count and spin…

A: We have given Total sector = 6 Red sector = 3 Blue sector = 2 Cyan sector = 1

Q: Ute the appropriate technology to answer this question. The College Hoard provided comparisons of…

A: a) Null Hypothesis: H0:μ1≤μ2 Alternative Hypothesis: H1:μ1>μ2 Correct option: 2nd option.

Q: Is college worth it?: A poll was conducted to determine why Americans decide not to go to college.…

A: Given that  Sample size n =322 Sample proportion p^=0.46

Q: Health Care Public Option: A poll was conducted in 2009 in order to evaluate support for the healht…

A: Givenp1^=0.74sample size(n1)=826p2^=0.41sample size(n2)=763confidence interval = 95%

Q: their statistics finals? Final exam scores of ten randomly selected male statistics students and…

A:

Q: his year Carroll graduates 8 physics majors, and each of them takes a standardized national physics…

A: Solution-: Given: μ0=71,n=8, α=0.1 We find, (a) Test statistic=? (b) p-value=?

Q: A sample of 13 small bags of the same brand of candies was selected. Assume that the population…

A: Given, n= 13 mean= 3 std. dev. =0.15 Population std. dev. = 0.1 Confidence interval for mean: Error…

Q: The data in the table is the number of absences for 7 students and their corresponding grade. Number…

A:

Q: er to the following scenario. A government official is in charge of allocating social programs…

A: Solution: Given information: n= 129 Sample size of people  x= 22 people have annual income below the…

Q: Which of the following better approximates the variance of the sample means? a. 4 b. 2. VN-n Vn N-1

A: here given, σ = population standard deviation  N= population size  n= sample size

Q: Illustration 21.18. Following two tables give the condition of home and condition of child in a…

A:

Q: after the viewing. (Use the traditional method) List the null and alternative hypothesis, the…

A:

Q: scores of the students are normally distributed with a mean of 85 and a standard deviation of 4.…

A: Given that.   X~N( μ , ?^2 )   μ= 85    , ?=4   , X=72   Z-score =( x - μ )/?

Q: The following are the scores of 10 students in a 50-item quiz.   42, 38, 33, 46, 42, 40, 38, 36,…

A: Given  Score of 10 students  Xi: 42, 38, 33, 46, 42, 40, 38, 36, 45,43 To find mean score of…

Q: If the boundaries of a class interval are 17.5 and 26.5, then what is the class size? A 9 B 8 C) 17…

A: We have given that,  The boundaries of class interval  = 17.5 and 26.5  Then,  We will find the…

Q: (c) Assume that the population standard deviation is o = 3. Perform a hypothesis test at the a =…

A: For the given data ( c ) State the null and alternative hypotheses

Q: 6) A small business owner you follow on TikTok is SO EXCITED because last month, she was able to…

A: The essential conditions for constructing a confidence interval are as follows: The sample should…

Q: Nlustration 12.7. Below are given figures of. production in 000's quintals of a Sugar factory. Year…

A:

Q: 9. What is the margin of error if n=16, s = 4.2 , x= 50, 95% confidence (t a/2= 2.13) 10. A survey…

A:

Q: Edit View History Bookmarks Window Help Save OFF ... SMH 台0 ^G日 Draw Design Layout References…

A: Given Population mean μ=37.5, sample standard deviations s=2.497221, n=10, level of significance…

Q: Health Care Public Option: A poll was conducted in 2009 in order to evaluate support for the healht…

A: From the provided information,

Q: Find the mean: Find the median: Find the standard deviation:

A: We have to calculate the mean, median and standard deviation of given data. First we have to sort…

Q: You are not expected to plot the points from the table. Fitting normal curve for: (i) 1 8. (ii) P2…

A:

Q: 2. A study published in the journal of Nature claimed that students showed an increase in average…

A: There are two independent samples which follows normal distribution. We have to test whether the…

Q: Using the straight line method of least square compute the trend values and 4 5 Day : Sales : 1 2 3…

A:

Q: a.) Using the p-value method, test the claim that the mean salary for high school teachers in…

A:

Q: In 1940 the average size of a U.S. farm was 174 acres. Let's say that the standard deviation was 54…

A: Solution

Q: 2. Given that Z is the standard NORMAL score, find and SKETCH: a) P (Z-1.6) c) P (-4<Z<1.96)

A: Let Z be the random variable from standard normal distribution with mean = 0 and standard deviation…

Q: 18.Cohen's d? Calculate it using M1 = 15 and M2 = 12 estimated mean difference M, -M, estimated d =…

A: Given that  Sample sizes n1=14 , n2=28 M1=15 , M2=12 SP2=14

Q: Let x be a random variable that represents the weights in kilograms (kg) of healthy adult female…

A: a) Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: The obtained sample mean was very likely if the null hypothesis is true, so H0 was rejected.…

A:

Q: 1. Number of women in makati city who died from lung cancer in 2004 estimated revenue (in pesos) in…

A: Given that - 1. Number of women in makati city who died from lung cancer in 2004 / estimated revenue…

Q: Does being part of a support group affect the ability of people to quit smoking? A county health…

A:

Q: 4 2 5 1 28. Using two tails, an alpha level of .01 and your df (calculated in #24 above), what is…

A: We have given that a researcher would like to evaluate the effectiveness of a pain relief patch…

Q: 66.5 160 67.5 110 68.5 50 69.5 20 70.5 5 71.5-72.5 1,000 Test the normality of the distribution.

A:

Q: Answer the problem and show your solution: You are planning to buy a cellphone with a good quality…

A: Given that  n=50 , Mean=x̄=13500 , Margin of error=E=273.65 99% confidence level  Note: According to…

Q: C. Find the mean, variance, and standard deviation of the following discret uniform distribution and…

A: In question,  Given that X is random variable having pmf p(x). Then we'll find the value of mean,…

Q: The IQ scores of a large group of students are approximately normally distributed. What is the…

A: For the given Find p( 108 &lt; x&lt;127 ) =?

Q: 22.3 E-cigarettes and smoking cessation, continued. Excercise 22.1 describes an experiment comparing…

A: Hypothesis testing is an inferential procedure to test cause-effect relationship.

Q: a random variable x with a mean of 8.8 minutes and a standard deviation of 2.9 minutes. Assume that…

A: Given Let x be a random variable representing takeoff time in minutes Let us a assume that x has a…

Q: 1. A student performed an experiment to measure the concentration of calcium ion (Ca*) i seawater.…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…