In a survey, 35 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $47 and standard deviation of $6. Calculate, state, and interpret a 95% confidence interval to estimate the mean amount of money parents spend on their child's birthday gift. Round to the nearest 100th where necessary.

Q: Use the sample mean(78.5)and sample standard deviation (12.3671)in your calculations below. Use…

A: Given that:

Q: An insurance company crashed four cars of the same model at 5 miles per hour. The costs of repair…

A:

Q: On the Bar Chart in Figure C1 above, which of the datasets (left, middle or right) has the highest…

A: Bar chart is given here. Error bars gives the information about how the data is spread around the…

Q: middle 99.7% of car costs are between what values

A: Given that  Mean(μ) = $22,000 Standard deviation (σ) = $2000   We know that  68-95-99.7 Empirical…

Q: Margin of Error 3. In a sample of 120 jeepneys with a standard deviation of 35km/h speed. Find the…

A: Given, sample size = 120 standard deviation = 35 confidence level = 90% Critical value for the 90%…

Q: You throw a ball as far as you can 5 times, recording the distance for each throw: 165 feet, 184…

A: since only 5 observation is given we will consider them as sample (n = 5)and population (N = 100)…

Q: Seventy-six percent of Americans favor spending government money to develop alternative sources of…

A: Given that  p = 75%    and.   n = 140 By using the Binomial distribution

Q: You are curious about how the mean age of cars compares for students and faculty. You take a random…

A: We have given that a random sample of 25 students and a random sample of 25 faculty members.

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A:

Q: A researcher measures the amount of food consumed by each dog in her lab. She finds that the mean…

A: It is given that mean amount of food is 12 oz and number of dogs is 16. The sum of squared…

Q: Pam is planning to take a SAT Prep course. She asks 7 of her older sister's friends who used a prep…

A:

Q: A survey was conducted that asked 1002 people how many books they had read in the past year. Results…

A: Confidence interval is a part of interval estimation. It is the boundary that is used to estimate…

Q: An insurance company crashed four cars of the same model at 5 miles per hour. The costs of repair…

A: An insurance company crashed four cars of the same model at 5 miles per hour. The costs of repair…

Q: Matthew made the "Reach for the Top" trivia team because he consistently gave the correct answers in…

A: Let, Matthew made the "Reach for the Top" trivia team because he consistently gave the correct…

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: Provide a set of 20 data points that has a mean of 20, a median of 25, an IQR of 10, and a sample…

A: Data should have mean of 20, a median of 25, an IQR of 10, and a sample standard deviation between 9…

Q: 2. Repeat Problem 1, however, this time, follow the practice of our textbook which advises the use…

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

Q: A Population has a Mean of 90 and a standard deviation of 25.  A sample of 20 college students is…

A:

Q: ould have the right to marry. (The 2014 data were collected before the 2015 US upreme Court decision…

A: There are four types of level of measurement, i.e.,  Ratio scale: data is continuous and have a…

Q: You are curious about how the mean age of cars compared for students and faculty. You take a random…

A:

Q: Suppose there are 5 students in a room. The mean age is 20.0 years, and the median age is 19. If the…

A: From the provided information, There are 5 students in a room. The mean age is 20.0 Years. The…

Q: The average and standard deviation for ACT scores are 20 and 3 respectively. average and standard…

A:

Q: As reported in Runner's World magazine, the times of the finishers in the New York Cit km run are…

A:

Q: Explain why each scenario is either sample or population standard deviation. All SCAD students are…

A: Survey based question

Q: Use the sample mean(78.5)and sample standard deviation (12.3671)in your calculations below. Use…

A: Given information:

Q: Thirty randomly selected students took the calculus final. If the sample mean was 74.2 and the…

A: From the provided information, Sample size (n) = 30 Sample mean (x̅) = 74.2 Standard deviation (s) =…

Q: For a study conducted by the research department of a pharmaceutical company, 225 randomly selected…

A:

Q: A candy manufacturer has replaced 5.17% of their chocolate bars with a new mystery flavor. Find the…

A: Given: Sample size (n) = 424 p(chocolate bars with a new mystery flavor) = 5.17% = 0.0517

Q: Nationally, patients who go to the emergency room wait an average of 4 hours to be admitted into the…

A: Solution: Let X be the waiting time. From the given information, x-bar = 2.7 hours, S=2.8 hours and…

Q: On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90,…

A: Given that, Mean = 72 Standard deviation = 7

Q: student scored in the 75th percentile on the SAT. What does that mean?

A:

Q: According to the IRS, the average refund in the 2011 tax year was $3,109. Assuming that the standard…

A: The problem is asking us to calculate the standard error of the sample mean. The standard error of…

Q: A survey was conducted that asked 956 people how many books they had read in the past year. Results…

A: From the provided information, Sample size (n) = 956 Sample mean (x̅) = 14.1 Sample standard…

Q: A survey was conducted that asked 1005 people how many books they had read in the past year. Results…

A: Given,sample meaan(x¯)=14.3sample standard deviation(s)=16.6sample size(n)=1005degrees of…

Q: Disability causes 48% of all mortgage foreclosures. Given that 20 mortgage foreclosures are audited…

A: Here's if we consider Binomial distribution then probability of success is 0.48 and number of trial…

Q: C2. GSS 2014 and GSS 2018 respondents were asked their opinion on whether homosexuals should have…

A: Given information: GSS 2014 and GSS 2018 respondents were asked their opinion on whether…

Q: The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances…

A:

Q: A survey was conducted that asked 972 people how many books they had read in the past year. Results…

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Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

A: Given: X¯1=77n1=259X¯2=90n2=344X¯3=66n3=171

Q: 3; 8; -1; 1; 0; 4; -3; 2; -1; 5; 4; -2 what is the standard deviation for this sample?

A: Given, The 12 change scores are 3,8,-1,1,0,4,-3,2,-1,5,4,-2

Q: Four of your classmates measured the diagonal length of the blackboard. Classmate A measured it as…

A:

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A: Given Solution: The following is the data provided: