QUESTION 11 Assume that the time spent by students in extra curricular activities per week is normally distributed with a standard deviation of 15.35 hours. A random sample of 33 students is selected. Find the standard error of the sampling distribution of the sample mean time? Round your answer to two decimal places.

Q: The U.S. Department of Agriculture claims that the mean cost of raising a child from birth to age 2…

A: GivenMean(x)=13225standard deviation(s)=1730sample size(n)=500significance level(α)=0.11

Q: 7.26 Testing the sticker information. Refer to the previous exercise. The vehicle sticker…

A: Given: Testing the sticker information. Refer to the previous exercise. The vehicle sticker…

Q: a) What is dependent and independent variables? b) Fully write out the regression equation. c) Fill…

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

Q: In behavioral trials, Dr. Richards-Zawacki found evidence for assortative mating preference in a…

A: From the given information,  Dr. Richards-Zawacki found evidence for assortative mating preference…

Q: It is claimed that 71% of all bald eagles survive their first year of life. Based on this, if 31…

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

Q: K The least-squares regression equation is y = 745.9x + 12,727 where y is the median income and x is…

A: Given: The least-squares regression equation is: Y = 745.9X+12727 The correlation coefficient r =…

Q: USE THE 8-STEP HYPOTHESIS TESTING The following table shows the distribution of uric acid…

A: Given: The following table shows the distribution of uric acid determinations taken on 250 patients.…

Q: The weight of a green forest frog has a normal distribution with mean 150.3 g and a standard…

A:

Q: Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a)…

A: given data, the confidence level is 95%n=64population standard deviatin is unknown we have to answer…

Q: A box contains 13 green marbles and 7 white marbles. If the first marble chosen was a green marble,…

A: given data, 13- green marbles 07- white  marbles 20 - total marbles if the first marble choswn was a…

Q: Question 4: Assume that the helium porosity (in percentage) of coal samples taken from any…

A: Given Standard deviation=0.75

Q: A survey of 2000 college students found that the mean number of credit hours taken per semester is…

A: Please note that as per our guidelines if multiple sub-parts are there in a question we can answer…

Q: 不 A researcher wishes to estimate the percentage of adults who support abolishing the penny. What…

A: Given: Margin of error E = 4% = 0.04 Confidence level = 99% p = 22% = 0.22 Formula Used: n =…

Q: We consider a pair of continuous random variables (XY) whose joint density is give f(x, y) = {k(² +…

A: As per our guidelines I can solve only first three subparts. Kindly post the remaining subparts…

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A: It is given that the mean is 6.8 and the standard deviation is 1.1.

Q: USE THE 8-STEP HYPOTHESIS TESTING The following table shows the distribution of uric acid…

A: Given: The following table shows the distribution of uric acid determinations taken on 250 patients.…

Q: 8:35 K A pediatrician wants to determine the relation that exists between a child's height, x, and…

A: (a) Obtain the regression equation. The regression equation is obtained below as follows: From the…

Q: The Department of Health collected data on the amount of sodium (in mg) in hotdogs advertised…

A: Given data The departement of health collected data on amount of sodium in hot dogs advertised…

Q: The following data represent the pH of rain for a random sample of 12 rain dates. A normal…

A: Obtain the 95% confidence that the population mean pH of rain water. The 95% confidence that the…

Q: You are using a local home remodeling company to remodel your kitchen. They have 11 different…

A: From the provided information, There are 11 different cabinet door styles, 15 countertop choices and…

Q: A college claims that the proportion of graduates at a midsize university who found a job within one…

A: The distribution of data follows normal distribution with larger sample or population variance is…

Q: A survey of 66 randomly selected students finds that they spend a mean of $440 per semester. Assume…

A: Given that, Sample size (n) = 66  Mean (x) = $440  Population standard deviation = $53

Q: At the local car shop, the amount of time required for an oil and filter change on an automobile is…

A: Given that  The time required for an oil and filter change on an automobile is normally distributed.…

Q: An engineer wants to determine how the weight of a gas-powered car, x, affects gas mileage, y. The…

A: As per our guidelines I can solve only first three subparts. Kindly post the remaining subparts…

Q: USE THE 8-STEP HYPOTHESIS TESTING In a study by Xiao and Shi (A-14), researchers studied the effect…

A: Hypothesis test are used to compare sample and population. It is broadly of two types, they are…

Q: A. P(Weekend) = B. P(Winter) = C. P(7-Day AND Fall) =

A: by bartleby policy i can gives only 3 subparts at a time  From given data we have :   Spring…

Q: Victims of Violence A random survey of 86 women who were victims of violence found that 20 were…

A: given data women : n1 = 86x1  = 20men : n2  = 54x2 = 6α = 0.10claim : p1 ≠ p2

Q: 1. It has been noted that there is a positive correlation between the U.S. economy and the height of…

A: Given that: # of Absences (in weeks), X Exam Grade, Y 2 90 3 85 0 95 1 92 4 80

Q: A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older…

A: given data  with drug treatment n = 24 x¯ = 80.4s = 23.990% ci for mean

Q: In a study of 420 comma 113 cell phone​ users, 139 subjects developed cancer of the brain or nervous…

A: Given n=420113 X=139 0.001 significance level

Q: n AP stats class has 25 Senior and 5 Juniors. There are 22 total students in National Honor Society…

A: given data  An AP stats class has 25 Senior and 5 Juniors. There are 22 total students in National…

Q: A New York Times article reported that a survey conducted in 2014 included 36,000 adults, with 3.71%…

A: Formula are used accordingly.

Q: In a survey of 2325 adults, 711 say they believe in UFOs. Construct a 99% confidence interval for…

A: Suppose, p is the population proportion of all adults, who say that they believe in UFOs.

Q: A corporation that maintains a large fleet of company cars for the use of its sales staff is…

A: Given data: Sample size= 20 Confidence level = 90%

Q: Data Analysis Question, please show all work and show where all calculations came from A group of…

A: Confidence interval is used to test the range where the true value of population parameter lies. It…

Q: Does the data provide sufficient evidence to conclude that the true mean number of sales at location…

A: Given, For location A; n1=18 x1¯=39 s1= 8 For location B; n2=13 x2¯= 49 s2= 4 Significance level, α…

Q: Suppose that E and F are two events and that N(E and F)=420 and N(E)=740. What is P(F|E)?

A:

Q: 7.144 Sample size calculation. Example 7.13 (page 449) tells us that the mean height of 10-year-old…

A:

Q: We want to know if there is a difference between the mean list price of a three bedroom home, μ3,…

A: Method: By Using the hypothesis testing

Q: Students at a major university are complaining of a serious housing crunch. They complain that many…

A: Given information: Mean=μ=18Standard deviation=σ=3.9 Chebyshev's theorem: At least 75% of the…

Q: Surveys were conducted in March of 2020, 2021, and 2022, and in each year, 1000 people age 18 or…

A: Given is the data on the survey that asked people on their opinion to use a credit card to pay…

Q: the same city. For the private university, 1042 alumni were surveyed and 655 said that they attended…

A: According to the given information in this question We need to find the conclusion of the given test

Q: A researcher wants to calculate a 95% confidence interval for the unknown true proportion of…

A: given data  given data sample size (n) = 201favorable outcomes (x) = 3195% ci p.

Q: 28.) A Certain Blood Group type can be find only in 0.05% of the people. If the population of a…

A:

Q: In a race, the odd favour of cars P,Q,R,S are 1:3, 1:4, 1:5 and 1:6 respectively. Find the…

A: The solution is given below:

Q: Consider a hypothetical regression predicting if someone will be married or not by the age of 40,…

A: From the above data  We are given that the regression equation MARRIED= 0.2 + 0.03*EDUCATION -…

Q: It is claimed that 73% of all students at a college still need to take another math class. Baseed on…

A: Givenp=0.73sample size(n)=37Let "x" be the no.of students need to take another math…

Q: Match the linear correlation coefficient to the scatter diagram. r= -0.946 Choose the correct graph…

A: Solution: The value of the correlation coefficient is r= -0.946

Q: Based on a smartphone​ survey, assume that 57​% of adults with smartphones use them in theaters. In…

A: Given data 57% of adults with smart phones use them in theatres n=224

Q: (b) The standard error of the sample mean is s²/n. (c) A researcher wants to test Ho: x= 30 versus…

A: Part (b) : Given that, the standard error of a sample sample mean is s2/n. The statement is wrong…