A candle company wishes to estimate the time it takes their candles to completely burn. They choose 23 candles at random from their latest production run and measure how long each takes to burn. The average time of this sample is 264 minutes with a standard deviation of 25 minutes. If the company uses a 99% confidence interval to measure the average burn time of all candles in this production run, what will their margin of error be? please

Q: Times for a surgical procedure are normally distributed. There are two methods. Method A has a mean…

A:

Q: Among 157 Hispanic American men ,the mean systolic blood pressure was 146 mm Hg with a standard…

A: Hypotheses: Null hypothesis: H0: µ = 140. Alternative hypothesis: H1: µ >140. Here, the…

Q: Does it take a different amount of time for seeds to germinate if they are near rock music that is…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: A super department store chain has just ordered and received 1000, 48-inch ceiling fans. The store…

A: From the given information, a supermarket department store has 1,000 ceiling fans. That is, the…

Q: A research company wants to estimate the mean IQ score for the population of all high school…

A:

Q: A clinical trial is being conducted in order to determine the efficacy of a new drug that will be…

A: Given: Margin of error E=5 Standard deviation σ1=σ2=15 Confidence level is 95% Significance level is…

Q: A sample of 13 concerts showed their average noise levels were 82 decibels and their standard…

A: Solution: Let X be the noise level From the given information, x-bar=82 decibels, s=7 decibels and…

Q: To determine whether a new drug designed to lower a person’s heart rate is effective or not, Dr.…

A: Since sample size is large and population standard deviation is known, z-test is appropriate in this…

Q: The September energy consumption levels for single-family homes are found to be normally distributed…

A: The objective of this question is to find the probability that the September energy consumption…

Q: Recently I abandoned my AT&T unlimited data plan because it was costing way too much for what I felt…

A: 1.   a)   The degree of freedom is, n -1 = 28-1 = 27. The level of significance is 0.10(1-0.90) and…

Q: Peak expiratory flow (PEF) is a measure of a patient’s ability to expel air from the lungs. Patients…

A: The hypothesized mean is as follows μ=306 The sample size is 50. n=50 The sample mean x¯=274 The…

Q: An error that occurs because of chance is called: nonsampling error. O sampling error. O probability…

A: An error that occurs because of chance is called as....

Q: ck music that is continuously playing compared to being ar classical music? The 54 seeds that were…

A: Given The 54 seeds that were exposed to rock music took an average of 30 days to germinate. The…

Q: A statistics teacher taught a large introductory statistics class, with 500 students having enrolled…

A: Given: μ=78σ=10n=25x¯=83

Q: A review of all records in a large vetinary clinic show that indoor domestic cats at the clinic have…

A: Mean () =15standard deviation () =4sample size (n)= 37

Q: The number of combined points scored in NBA games is normally distributed with a mean of 200.6…

A: From the provided information, Mean (µ) = 200.6 Standard deviation (σ) = 6.74 Let X be a random…

Q: One year, the mean age of an inmate on death row was 39.2 years. A sociologist wondered whether the…

A:

Q: For a random sample of 90 overweight men, the mean number of pounds that they were overweight was…

A:

Q: The scores on a standardized test are normally distributed with a mean of 90 and standard deviation…

A: The test score is 0.6 standard deviations above the mean is obtained below: From the given…

Q: The results of a common standardized test used in psychology research is designed so that the…

A: Formula for z-score is,

Q: It takes an average of 10.2 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: We want to find the null hypothesis and alternate hypothesis,  test statistics  Note: According to…

Q: The standard deviation for a population is o = 14.8. A sample of 25 observations selected from this…

A: c) Given that  σ=14.8x¯=137.30n=25 Confidence level=90% Significance level=10% z critical value…

Q: In 1988, on the math SAT, the males taking the exam averaged about 500, while the females averaged…

A: From the provided information,

Q: a sample of 1963 scores was drawn from a normal distribution with a mean of 19.84 and a standard…

A: Given that, μ=19.84,σ=1.918n=1963 Consider that exactly 2.3512% of the distribution of means falls…

Q: The scores on a test are normally distributed with a mean of 150 and a standard deviation of 30.…

A: The normal distribution:A continuous random variable X is said to follow normal distribution if the…

Q: How can i compute the standard deviation

A:

Q: (b) Based on your sample, enter the lower and upper limits to graph the 95% confidence interval for…

A: It is given that the information of one sample for calculating the confidence interval for normal…

Q: Lorraine was in a hurry when she computed a confidence interval mean. Because the standard deviation…

A:

Q: In the current pandemic situation, customers are making greater use of grocery home delivery…

A: 1) The population of the provided study is all the customers in Fairfax county which are having…

Q: Times for surgical procedure are normally distributed.  There are two methods. Methods A has a mean…

A:

Q: a. For this study, we should use Select an answer b. The null and alternative hypotheses would be:…

A: Here AS PER POLICY I HAVE CALCULATED FIRST 3 SUBPART PLZ REPOST FOR REMAINING PARTS

Q: A clinical trial is being conducted in order to determine the efficacy of a new drug that will be…

A: The general formula for the sample size is, n=2zα+zβσME2