Comparison of average commute miles for randomly chosen students at two community colleges:   x⎯⎯1x¯1 = 23, s1 = 5, n1 = 22, x⎯⎯2x¯2 = 32, s2 = 7, n2 = 19, α = .05, two-tailed test. (Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick" rules for degrees of freedom.)        d.f.   t-calculated   p-value   t-critical +/-

Q: A teacher gives a reading skills test to a third-grade class of n = 25 at the beginning of the…

A: Given The data is as follows: Sample size, n=25 Sample mean of difference, MD=12.7

Q: How would i find the p-value?

A: The test statistic is -1.41.

Q: What is the percentage of scores that lie between a z score of -2 and a z score of 1?

A:

Q: Supposed that you were asked to examine the relationship between the height of children and their…

A: The test statistic is given as-  t=estimate/standard error For slope, t=0.73/0.10=7.3 For intercept,…

Q: If Julio’s score on an IQ test is 73, what is his score as a z score? (M = 100, s = 15)

A: The z-score is obtained below: From the given information, the Julio’s score on an IQ test is 73.…

Q: For the following problem, please round to two decimal places: An experimenter hypothesizes that…

A: Given information: Mean score for biology majors is 27.1. Mean score for literature is 24.2…

Q: You are testing the claim that the proportion of men who own cats is larger than the proportion of…

A: Givenclaim is proportion of men who own cats is larger than the proportion of women who own…

Q: You are testing the claim that the proportion of men who own cats is larger than the proportion of…

A: We have to find given proportion.

Q: In a large clinical trial, 392,323 children were randomly assigned to two groups. The treatment…

A: Solution

Q: If we know the average speed (s1) for an unknown distance, d, and the average speed (s2) of a second…

A: Consider the given: The average speed s1 for distance d and average speed s2 of the second journey…

Q: ate Kobe was 6'6" (or 78 inches).  Suppose the average height of men is 5'9" (or 69") and SD is 3".…

A:

Q: You are testing the claim that the proportion of men who own cats is smaller than the proportion of…

A:

Q: whats the test static round to 2 decimals.

A:

Q: A social worker reports that 30% of workers in a factory are below 15 years of age. Of the 120…

A: Let p denotes the population proportion of workers in a factory who are below 15 years of age. Given…

Q: What is the main difference between z score and T score?

A: Z Score and T scores are both used in Hypothesis testing.  Z score is used while using z test and T…

Q: The correlation between overall grade in the class and the scores on the final was 0.734. How much…

A: The correlation between overall grade in the class and the scores on the final was 0.734.

Q: You are testing the claim that the proportion of men who own cats is larger than the proportion of…

A:

Q: Test a claim that the mean amount of carbon monoxide in the air in U.S. cities is less than 2.34…

A: As per our guidelines we can solve first three sub part of question and rest can be…

Q: You are testing the claim that the proportion of men who own cats is significantly different than…

A: Denote p1 is true proportion of male who won cat and p2 is the true proportions female who won cat…

Q: You want to estimate the percentage of statistics students who get grades of C or better. How many…

A: In the given case we need to find the minimum sample size that will give the margin of error equal…

Q: If the average time for a fifth grader to run a mile is 8.50 minutes (s = 1.25), what percentage of…

A:

Q: A population of N = 15 scores has a mean of u = 8. One score in the population is changed from X =…

A: Given that Number of observations N = 15 Mean = μ = 8

Q: What is p value ?

A: The​ P-value is the probability of observing difference in the sample statistic this high or higher…

Q: What is wrong if you conduct a study and you calculated r=-3.0,then what?

A: If we conduct a study and got the correlation coefficient value (r) = -3.0

Q: What is the difference between the average resistance to happiness at age 20 and at age 70?

A: Given :-  R = 4.6 - 0.02x put x = 20. ⇒R=4.6 - 0.02 × 20⇒R=4.6 - 0.4⇒R=4.2 Now, put x = 70 ⇒R=4.6 -…

Q: You are testing the claim that the proportion of men who own cats is smaller than the proportion of…

A:

Q: you have two results for p= technically which one is the correct reference?

A: We have to find the value of p.

Q: The claim is that the proportion of adults who smoked a cigarette in the past week is less than…

A: From the provided information, The hypotheses can be constructed as: Null hypothesis: H0: p = 0.25…

Q: A sample of n = 11 scores has a mean of M = 55.  One new score is added to the sample and the new…

A: It is given that , A sample of n=11 has a mean of M =55.

Q: The z score length of a carrot is 1.5, what is the length of this carrot?  what percentage of…

A: We have to find  the percentage of carrots....

Q: The mean time for the 100 yard dash for adolescents is 12.04 seconds (M = 12.04, s = 4.1). A runner…

A: Given :  The mean time for the 100 yard dash for adolescents is 12.04 seconds (M = 12.04, s = 4.1).…

Q: You are testing the claim that the proportion of men who own cats is larger than the proportion of…

A: Given,n1=190  ,  p^1=0.20n2=90  ,  p^2=0.45

Q: You are testing the claim that the proportion of men who own cats is significantly different than…

A:

Q: Using the answer from Step 1, find the percent of the patients with IQs above 104. (Round your…

A: Let X be the random variable such that IQ. The z-score for an IQ of 104 is 0.75. It it required to…

Q: The expression S(Xi) directs us to find the  sum of scores median  average of the scores  middle…

A: The expression S(Xi) directs us to find the sum of scores

Q: how do i calculate a z score or find the X-Value and determine if a score is usual or unusual

A: A z-score measures exactly how many standard deviations above or below the mean a data point is.

Q: You want to estimate the percentage of statistics students who get grades of C or better. How many…

A: Obtain the sample size. The formula of sample size is, Obtain the area of probability in the right…

Q: What percent of scores are below a z-score of z=−1.19? (You can use the z-table)

A: Given: z-score = z=−1.19 We want to find the percent of scores that are below a z-score.

Q: You are testing the claim that the proportion of men who own cats is larger than the proportion of…

A:

Q: Ministry of economic development conducted a survey to determine why people go to trade shows. The…

A: Followings are the Explanation of the question    Use the two sample z test  Given that, Sample…

Q: Prof. Leen wants to estimate the more than 92% percent of adults living in a large city have cell…

A:

Q: Why does the use of multiple t tests increases?

A: The multiple t-tests are defined for a one-sample multivariate test and as well as for two samples.…

Q: z=+2.00 and x=30 corresponds to z=-1.00 what is the population

A:

Q: Aparticularly statistically curious clickbait website writer noticed that all the cool creative…

A: Use the given data to form the excel table:   X Y X*Y X*X Y*Y   3.6 32 115.2 12.96 1024…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.