In a sample of 41 men, 25 said that they had less leisure time today than they had 10 years ago. In a sample of 41 women, 31 women said that they had less leisure time today than they had 10 years ago. At a=0.01, is there a difference in the proportions?  Find the critical value(s). Round the answer(s) to two decimal places. If more than one critical value, seperate with commas.  Compute the test value. Round answer to at least three decimal places.  Should we or should we not reject the null hypothesis?

Q: There are 5000 observations in a data set. 10% of the data are “1”s, while the rest are “0”s. If we…

A: The data set consist of 5000 observations. The observations are 0's and 1's. An amount of data…

Q: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

A: Given that a magazine provided  results from a poll of 1500 adults who were asked to identify their…

Q: A researcher would like to evaluate the effectiveness of a pain-relief patch designed for lower back…

A: The hypotheses are given below: Null hypothesis: H0:µd=0 Alternative hypothesis: H1:µd≠0…

Q: f. A random sample of n=80 observations from a quantitative population produced X = 30.2 and s2 =…

A: Given X-bar=30.2 n=80

Q: Weatherwise is a magazine published by the American Meteorological Society. One issue gives a rating…

A:

Q: For a population with u = 34 and o = 8, what is the X value corresponding to z = -0.50?

A: We have given that.   X~N( μ , ?^2 )   μ =34 , ? =8      Z-score =( x - μ )/?   Z= -0.50

Q: 2. An experiment was conducted to determine the effect of four different types of tips in a hardness…

A:

Q: Can you support the original claim? Choose the correct answer below. O A. Yes, at the 9%…

A: We have given that the data of four countries A, B, C and D.

Q: A sample of 1000 observations taken from population-1 gave x, =290 . Another sample of size 1200…

A:

Q: A study of 4299 adults from country A found that 2248 were obese or overweight. The point estimate…

A:

Q: For a population with u = 30 and a = 4. Find the z-score that corresponds to an X value of 34.

A: From the provided information, Mean (µ) = 30 Standard deviation (σ) = 4 X~N (30, 4)

Q: Given the (x,y) data points (1,0) (3, 1.12) (4, 2.46) for the Xo X, and x, respectively. Using…

A:

Q: An automotive service center would like feedback on its customer service. Each customer receives a…

A: There are some sources of bias in any data collection process. For any study, if an individual does…

Q: For a population with u = 100 and o = 20, what is the X value corresponding to z = 1.50? O 130 O 30…

A:

Q: A sample of blood pressure measurements is taken for a group of​ adults, and those values​ (mm Hg)…

A: a)Given data set for systolic measurements is 120,129,160,98,154,120,118,136,127,119sample…

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

A: Solution

Q: A factory hiring people for tasks on its assembly line gives applicants a test of manual dexterity.…

A: The data is given for males and females.Want to calculate the confidence interval for the difference…

Q: Which of the following are the critical r values in the analysis (two-tailed and a = .05)? 1.6321…

A:

Q: A random sample of the price (in $) of a hamburger at 37 restaurants in ACME City found: x = $9.83,…

A:

Q: On a stats exam with μ = 82 and σ = 10, Student A scored 7 points below the mean, Student B had a…

A: Given Data: z-score of student A=(-7/10)=-0.7 z-score of student B=(85-82)/10=0.3 z-score of student…

Q: A researcher would like to evaluate the effectiveness of a pain-relief patch designed for lower back…

A: answer is explained below-

Q: sample has OX = 64 OX = 60 O X = 70 OX = 68

A: Given: In a sample M=72 s=4 z=-2.00

Q: Suppose a random sample of n= 320 teenagers 13 to 17 years of age was asked if they use social…

A:

Q: Given X = 45, ? ̅=52, and s = 8. Compute for the corresponding z-score.

A: Given :  x = 45  Mean (x ) = 52Standard deviation (s) = 8

Q: Given the u = 38.27 and o = 3.56, compute the z- score that corresponds to the given score X =…

A: Given that :  u = 38.27 Standard deviation = 3.56 X = 35.52 By using standard normal distribution  Z…

Q: Assume that the average home price in the U.S. is µ = $292,700 with o = $60,000. A local real estate…

A: Hypothesis: The null and alternative hypotheses are below: H0: μ=292,700H1: μ>292,700 The test…

Q: A batch of 130 semiconductor chips is inspected by choosing a sample of 3 chips. Assume 5 of the…

A:

Q: for a population with μ=62 and ?=12, find the X value that corresponds to each of the following z…

A: Given Information: u = 62  s = 12

Q: In an outbreak of typhoid fever among attendees of an acquaintance party, 99 persons ate spaghetti,…

A: Given that:  n1=99  x1=30 n2=63 x2=20

Q: Use the results from a survey of a simple random sample of  1045 adults. Among the  ​1045…

A: Given that  Sample size n =1045 Population proportion p=92%=0.92

Q: The average time it takes Amazon to ship a product after it has been ordered is 21 hours. A manager…

A: The data of time taken (in hours) by 58 packages to ship is provided.

Q: The predicted college GPA for a high school GPA of 3.8 and a college board score of 500 is (Round to…

A: The equation of the college GPA is y^=0.16+0.51x1+0.002x2. The variable x1 is defined as the high…

Q: Find the z-score for each score in the population. Round each of your z-scores to two decimal…

A: The importance of standard normal curve lies in the fact that one has not to tabulate probability…

Q: 6. In your own words, explain the difference between a statistic and a parameter

A: Since you have asked multiple question, according to our guidelines we will solve the first question…

Q: A teacher finds that for test grades in Class A, x̄ = 32 and S x = 4; for test grades in Class B, x̄…

A: Given information: The mean and standard deviation of the test grades of class-A are 32 and 4,…

Q: Examine the image below and then answer all parts of the question under it. Enter your answers as…

A: a) There are 4 yellow objects in 10 objects.So, P(yellow)=410=0.4b) There are 3 hearts in the 10…

Q: data suggest that the extra carbonation of cola results in a higher average compression strength? A

A: Given, Sample Size for Cola, n1 = 17 Sample mean for Cola, x1¯ = 554 Sample standard deviation for…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A:

Q: A student in PSYC 227 class collects data for a class project. She asks 10 classmates to shoot 10…

A: Given:

Q: The response time in milliseconds was determined for three different types of circuits in an…

A: Given the summarized result as Hence the value of y12 can be fitted or estimated as y^12=21…

Q: In a survey, the sample consisted of 1087 adults who were parents of school-aged children. The…

A: Given : Mean , x̄ = 5.5 Median = 1

Q: 2. Find the following z-scores: a. Za10 b. Z.975 c. Z,005 0.005 d. Zs Zo30 "0.80 "0.30

A:

Q: The monthly salaries of a sample of 500 employees were rounded to the nearest R10 rand notes. They…

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Q: Your p value is .03 and you chose your α level to be .05. What kind of error could you be making?…

A:

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.