A company that manufactures gas fireplaces wants to estimate the average amount of heat produced by its newest model. A sample of 32 fireplaces produced an average of 20,720 BTUs of heat with a standard deviation of 270 BTUs.   Step 2 of 2:  Construct a 95% confidence interval. Round your answer to the nearest whole number. The company can say with 95% confidence that the average amount of heat produced by all the newest model fireplaces manufactured is between _____________________.

Q: The inside diameter of a randomly selected piston ring is a random variable with mean value 8 cm and…

A: The given information is

Q: How many trout were less than 20 inches long? Hint: 20 inches is the upper quartile of the box-and-…

A:

Q: X is a random variable whose cumulative distribution function F(x) satisfies F(1) = 13, F(2) = 34,…

A: Random variable is a function which takes points in form of events from sample space and gives…

Q: Use the spinner shown. It is equally probable that the pointer will land on any one of the regions.…

A: It is equally probable that the pointer will land on any one of the regions.

Q: In a sample of 26 participants, a researcher estimates the 95% CI for a sample with a mean of MD =…

A: Given information:In a sample of 26 participants, a researcher estimated the 95% CI for a sample…

Q: Find the mean, the standard deviation and the Z scores corresponding to the minimum and maximum…

A: 2.3, 1.0, 2.1, 6.5, 2.8, 7.8, 1.7, 2.9, 4.4, 5.1, 2.0

Q: Construct the 90% confidence interval estimate of the population proportion p if the sample size is…

A: n=200, x=152

Q: 3. Below is a list of grades from a basic calculus Test for 25 students 32 34 35 37 43 45 47 47 48…

A: 32,34,35,37,43,45,47,47,48,50,54,54,56,57,58,60,61,62,65,67,70,71,75,76,78,

Q: (d) What is the probability that a healthy 10-week-old kitten will weigh between 14 and 33 ounces?…

A: From the given information we haveMean() = 24.7standard deviation () = 5.65

Q: A certain confidence in interval is 5.65 <u<7.15. Find the sample mean x and the error of estimate…

A: 5.65&lt;μ&lt;7.15

Q: ensider the following hypothesis test. Ho: 1-₂0 H₁: 1-2 > 0 he following results are for two…

A: Sample sizes n1=35 ,n2=50Sample means x1=25.4 ,x2=23.3

Q: A random sample of 20 adults in a particular country were asked to state what type of birth control…

A: The given data represents the type of birth control methods use. The total number of samples is 20.

Q: (4 points) Determine the sample size required to estimate a population mean to within 11 units given…

A: E=11,σ=50,CI=90%=0.90α=1−CI=1−0.90=0.10Note: According to bartelby question answer guidelines an…

Q: Violet takes a survey of the ages of people in the food court at the mall at 1 p.m. and at 6 p.m. on…

A: The given graph represents the stem and leaf plot for the two groups. Groups 1 and 2 have the ages…

Q: In an analysis of variance with 4 groups, each containing 12 respondents. Please calculate the…

A: Total no.of groups(K)=4and n=12

Q: Do males have a significantly lower mean on the ACT test than females? n st. dev 50 mean Males…

A: t-test is used when population is from normal distribution and population standard deviation is…

Q: (4.20 Purchasing digital devices for children. Refer to the PC Magazine (December 2019) article on…

A: The probability distribution is give as:Where,x is the Age( years)  to buy 1st smart speaker.P(X=x)…

Q: refer to science, technology, engineering, and mathematics as the STEM disciplines. A research group…

A: Population proportion p=0.27Sample size n=130

Q: 10. Consider the following data set: duction 0.64 0.16 0.29 -0.38 0.49 0.81 -0.83 10.04 0.79 0.20…

A: Consider the given data: Data…

Q: Dirty air: The federal government has enacted maximum allowable standards for air pollutants such as…

A: The random variable is x.We have to find the mean and standard deviation.This is continuous…

Q: Use the spinner shown. It is equally probable that the pointer will land on any one of the regions.…

A: The spinner with different colored regions is provided. It is equally probable that the pointer…

Q: A manufacturer knows that their items have a lengths that are approximately normally distributed,…

A: According to the given information,Mean, μ = 10.1 inchesStandard deviation, σ = 1.7 inchesSample…

Q: The mean amount of money spent per week on gas by a sample of 32 Oxford drivers was found to be…

A: Solution-:Given: We want to For \alpha==1-c=1-0.95=0.05Step 1 of 4: Calculate the margin of error…

Q: places A new sample of 130 freshmen is selected. Find the probability that less than 29% of the…

A: It is given that p = 27% = 0.27n = 130

Q: According to a 2009 Reader's Digest article, people throw away about 7% of what they buy at the…

A: Given: Population proportion (p) = 7%  = 0.07    Sample proportion                  Sample size (n)…

Q: Claim: Fewer than 9.6% of homes have only a landline telephone and no wireless phone. Sample data: A…

A: Let p is the parameters that represent the proportion of homes that have only a landline telephone…

Q: In an early home game, an NBA team made 66 of their 100 free throw attempts. In one of their last…

A: The given information is,Early Home GameLast Home gameNumber of attempts madeNumber of free throw…

Q: Does it take less time for seeds to germinate if they are near rock music that is continuously…

A: The number of seeds were exposed to rock music, The number of seeds were exposed to classical music,…

Q: A toy manufacturer inspects boxes of toys before shipment. Each box contains 11 toys. The inspection…

A: According to the given information,Total number of toys, N = 11Sample size, n = 3Number of defective…

Q: Is memory ability before a meal the same as after a meal? Ten people were given memory tests before…

A: Before a mealAfter a meal6260808086747676767558607063514473717576

Q: You decide to play a game where you roll 3 six-sided dice and follow these rules: You get $5.00 for…

A: Get $5 if we roll 5Lose $2 for any other number rollTotal number of dice rolled(n)=3

Q: A company that manufactures gas fireplaces wants to estimate the average amount of heat produced by…

A: Sample size (n) = 32Mean x¯ = 20,720 BTUsStandard deviation (s) = 270 BTUsSignificance level(α) = 1…

Q: Let z be a standard normal random variable with mean ? = 0 and standard deviation ? = 1. Use Table 3…

A: The probability shows how likely an event occurs.

Q: A one-tailed sign test is used to test whether there is a positive difference between two…

A: A one-tailed sign test is used to test whether there is a positive difference between two…

Q: why is the first difference 10-4 when it's supposed to be 14-4?

A: True, the expert made mistake. The correct difference will be 14-4 =…

Q: Find the indicated area under the standard normal curve. To the right of z = -0.29 Click here to…

A: X~N(0,1)X follow with mean zero and standard deviation is 1.

Q: A random sample of 130130 observations produced a mean of ?=30.2x¯=30.2 from a population with a…

A: At 95% critical value of z is 1.96. . From z table

Q: Do students perform the same when they take an exam alone as when they take an exam in a classroom…

A: From given data we have : AloneClassroomdiff.857411888177879-186806776988171108380371665

Q: manufacturer knows that their items have a normally distributed lifesp andard deviation of 0.5…

A: Population mean=2.5Population standard deviation=0.5

Q: Suppose that in a particular population of people, 76% have brown eyes. If you were to select eight…

A: It is given that 76% have brown eyes and a 60 people at random.

Q: A report on electronic monitoring and surveillance summarized a survey of 308 U.S. businesses. The…

A: We have given thatn = 308x = 91

Q: Although the rules of probability are just basic facts about percentages or proportions, we need to…

A: b)Two events are given.Such that, A = the person chosen is obese,B = the person chosen is overweight…

Q: 184. Michael and Lorenzo both took the same calculus test. Mi- chael scored an 87 on the test.…

A: We have givenMichael score ( X1) = 87Lorenzo z-score(Z) = + 1.2 Lorenzo mean and standard deviation…

Q: You want to obtain a sample to estimate the proportion of a population that possess a particular…

A: From the provided information,p* = 0.23E = 0.04Confidence level = 98%

Q: e. Based on this, we should Select an answer f. Thus, the final conclusion is that ... the null…

A: Let p1 and p2 be the two population proportions for Republicans and Democrats respectively.Given…

Q: Suppose the percentage of those completing a master’s degree is 42%. In a random sample of 9…

A:

Q: Suppose a random sample of 4949 measurements is selected from a population with mean 6060 and…

A: We have given thatMean() = 60Standard deviation() = 10Sample size (n) = 49

Q: sample of n = 80 C of I students found 16 with brown eyes. Give the numerical value of the statistic…

A: Sample size n=80Favorable cases=16

Q: 236. A sample of the number of study hours per week of college students is collected. Some of the…

A: The sample results of the survey are given as Study hoursZ-score percentile…

Q: Consider a population of 300 with a mean of 60 and a standard deviation equal to 28. What is the…

A: The mean is 60 and the standard deviation is 28.