s how it works?

Q: An experiment was conducted to determine the effect of exercises on elders' (above 60 years old) mem...

A: Test is that whether there is an effect of exercises on elder's memory. It is given that there are t...

Q: What is the margin of error for a poll with a sample size of 450 people? Round your answer to the ne...

A:

Q: How many earned an Associate/Junior College degree?___________ What percent of graduates earned a N...

A: Here use given table and basic probability  Probability = #no of Favorable outcomes/# no of total ou...

Q: 3. In mailed questionnaire you are going to send questionnaire to the postal place of the Keep Try i...

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a...

Q: Nlustration 25. Calculate mode from the following data: 50–70 KMarks 0-10 20-40 40-50 10–20 Frequenc...

A:

Q: A consumer watchdog organization estimates the mean weight of 1-ounce "Fun-Size" candy bars to see i...

A:

Q: A real number between 0 and 10 will be picked according to the probability distribution shown in the...

A: given;a real number between 0 and 10 will be picked according to the probability distribution shown ...

Q: Car rental prices have decrease since their peak. Based on the charts below, which two cities appear...

A: Disclaimer : “Since you have posted a question with multiple sub-parts, we will solve first three su...

Q: sample of size from the population data and obtains the following sample data:                   x 4...

A: We have given that,  The data set is,  405, 385, 495, 385, 555, 470 Then,  We will find the sample m...

Q: Suppose that the lifetimes of tires of a certain brand are normally distributed with a mean of 74,00...

A:

Q: An opinion poll asks a sample of 200 adults (an SRS) whether they favor giving parents of school-age...

A: Let p be the population proportion  n=number of sample  p=52%, n=200 Note: this probability value ca...

Q: Chapter 06, Section 6.4, Problem 044 A machine at Keats Corporation fills 64-ounce detergent jugs. T...

A:

Q: The total number of hrs, measured in units of 100 hrs, that a family runs a vacuum cleaner over a pe...

A: Given that,  fx=x,0<x<12-x1≤x≤20elsewhere 1) To find the probability that over a period of one...

Q: The ranks of same 16 students in Mathematics and Physics are as follows. Two numbers within bracket ...

A:

Q: Because there is a strong positive correlation between depression and risk of divorce, we can conclu...

A: Given:  Strong positive correlation between depression and risk of divorce then depression cause div...

Q: For a box plot, here are 4 values at the low end of a dataset and 4 values near the high end of a se...

A: Given that of dataset:   2.7, 5.5, 6, 9... 50.5, 54, 60, 65, ... If the lower fence or boundary for ...

Q: On the basis of the following information compute: () r23.1 (ii) 13.2 and (iii) 12.3 : 12 = 0.70; ri...

A:

Q: If a random sample of 16 homes south of a town has a mean selling price of $145,050 and a standard d...

A:

Q: The mean of marks in Statistics of 100 students in a class was 72. The mean of marks of boys was 75,...

A:

Q: In a survey of 200 boys, of which 75 were intelligent, 40 had educated athers; while 85 of the unint...

A: Given information, Among 200 boys, of which 75 were intelligent, 40 has educated fathers and 85 of t...

Q: Here is a fitted line plot for the relationship between the number of carbsin a breakfast cereal and...

A: Given a fitted line plot for the relationship between the number of cards in a breakfast cereal and ...

Q: Find the z-score that has 68.8% of the distribution's area to its right. The z-score is (Round to tw...

A: Standard normal table : The area of the region located under the bell curve and to the left of a giv...

Q: Data relating to age of the students and their games. Calculate correlation between the age of the s...

A:

Q: Suppose New York City has an average police response time of 8.5 minutes, with a standard deviation ...

A:

Q: Calculate Pearson's coefficient of skewness from the following data: f f 12.5 28 32.5 129 17.5 42 37...

A:

Q: On a nationwide test taken by high school students, the mean score was 47 and the standard deviation...

A: Given,mean(μ)standard deviation(σ)=11Empirical rules:1) P(μ-σ<X<μ+σ)=68%2) P(μ-2σ<X<μ+2σ...

Q: Based on information on 1,000 randomly selected fields about the tenancy status of the cultivation o...

A:

Q: Given the list of six numbers: 1, 2, 13, 50, 60, 62. If the number 70 is added to the list as the se...

A: Given data is 1,2,13,50,60,62Arrange the data in ascending order1,2,13,50,60,62Mean = sum of the dat...

Q: From the following data calculate the missing frequency : No. of tablets : 4–8 8–12 12–16 16–20 20–2...

A: Given frequency table is No.of tables 4-8 8-12 12-16 16-20 20-24 24-28 28-32 32-36 36-40 No. of...

Q: A researcher is examining cooperation between peers by observing children at six years eight years a...

A:

Q: The following zero-order correlat 12 =098, g3=0-44 multiple correlation coefficient trea ables as In...

A:

Q: A player tosses two fair coins. He wins $ 5 if 2 heads occur, $ 2 if 1 head occurs and 1 if no head ...

A:

Q: In a survey of 1136 people, 848 people said they voted in a recent presidential election. Voting rec...

A:

Q: the couple plans to have 5 children   How many probable combinations will there be if the couple w...

A: Let there are three students X, Y and Z sitting beside each other. The different ways in which this ...

Q: A dashboard warning light is supposed to flash red if a car's oil pressure is too low. On a certain ...

A:

Q: Suppose it is known that the IQ scores of a certain population of adults are approximately normally ...

A: Given that, the IQ scores of a certain population of adults are approximately normally distributed w...

Q: In a' cross-breeding experiment with plants at certain species 240 offspring were classified into 4 ...

A: The chi square test is used to test whether there is any significant relationship between the catego...

Q: In a trivariate distribution 01 = 2, 02 = 03 = 3 12 = 0-7, r23 = 131 = 0-5 %3D %3D Find (1) b12-3 an...

A: Given a trivariate distribution  with σ1 = 2 , σ2 = σ3 = 3, r12 = 0.7 ,  r23 =r31 =0.5 we need to f...

Q: The amount of sugar was measured for a sample of 30 different breakfast cereals. The sample mean amo...

A: Given: Sample mean (u)=10.4 Sample standard deviation (σ)=5.3 Number of sample (n)=30 We have to cal...

Q: Let X1,..., Xn be an iid random sample from the Binomial(k, p) distribution, where p is known but k ...

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

Q: In a recent year, the total scores for a certain standardized test were normally distributed, with a...

A: Given,mean(μ)=500standard deviation(σ)=10.3

Q: The test scores for the analytical writing section of a particular standardized test can be approxim...

A: Given  from graphMean(μ)=3.5standard deviation(σ)=0.77

Q: Ambient temperatures (°C) of the sites where the extremophilic bacterium species Deinococcus radiodu...

A: Five number summary : It has five measures : maximum value First quartile Second quartile / median T...

Q: a. Using Excel, develop the multiple regression equation for these data. b. What is the coefficient ...

A:   SOL Score Salary Tenure 1 81 34300 9.3 2 78 28700 10.1 3 76 26500 7.6 4 77 36200 8.2 5 8...

Q: In a trivariate distribution 01 = 2, 02 = 03 = 3 12 = 0-7, r23 = 131 = 0-5 %3D %3D %3D %3D Find (1) ...

A: Given : In a trivariate dist. σ1=2 σ2=σ3=3r12=0.7r23=r31=0.5

Q: During the class project for Marketing Research, you wanted to understand whether there is a differe...

A: The analysis of variance (ANOVA) examines the average differences between more than two groups. For ...

Q: Consider the following hypothesis test for the mean difference. (Give your answers correct to four d...

A:

Q: Geometric mean of the two numbers was found to be 4. However, it was later discovered that while cal...

A:

Q: 3. Consider the above Frequency Distribution of Salaries. Salary 41,000 - 50,000 51,000 - 60,000 61,...

A: Given the frequency distribution of salries. We need to answer the following questions: 1.What perce...

Q: Example 7.36. Let {Xx be mutually indepenaent, each assuming the values 0, 1, 2.3 ..., a - 1 with pr...

A: