The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 50 for a sample of size 20 and standard deviation 13. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 98% confidence level). Give your answers to one decimal place and provide the point estimate with its margin of error.

Q: Companies who design furniture for elementary school classrooms produce a variety of sizes for kids…

A: Given that, Mean = 39.2 Standard deviation = 1.9 Let X follows Normal distribution with mean 39.2…

Q: A mandatory competency test for high school sophomores has a normal distribution with a mean of…

A: Suppose a random variable X, defines the scores in competency test for high school sophomores.

Q: support the scientist’s estimate

A: A scientist estimates that the mean nitrogen dioxide level in Westman is greater than 28 parts per…

Q: One year, the mean age of an inmate on death row was 40.5 years. A sociologist wondered whether the…

A:

Q: It takes an average of 11.5 minutes for blood to begin clotting after an injury.  An EMT wants to…

A: Sample size n=59 Sample mean=12.3 Population standard deviation =2.35 NOTE:- According to bartleby…

Q: The class mean for the exam was 82 with a standard deviation of 6.  There are 37 students in the…

A: We have given that, Mean = 82 , standard deviation σ = 6  sample size n = 37   Standard error of the…

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: Choose a quantitative variable.  Measure it on two different samples of 10, drawn from two different…

A:

Q: a 95% confidence interval for the mean of diastolic BP in women is 62 to 110mmHg.  What is the…

A: We have given that 95% confidence interval CI = ( 62, 110) Confidence level (c) = 95% = 0.95…

Q: Estimate the proportion of steaks that weigh less than 1.3 pounds. e proportion of steaks that weigh…

A:

Q: Loretta, who turns 91 this year, has heard that the mean systolic blood pressure among the elderly…

A: The hypothesis for the claim 'mean systolic blood pressure among elderly adults is greater than 120…

Q: Amy is studying the amount of sleep that college students get on class-nights. Earlier sleep…

A: Formula for the sample size needed to estimate a population mean is

Q: A study was conducted with a sample of 20 college students to see how many students would have low…

A: Suppose a random variable x defines the bone mineral density of students.

Q: oretta, who turns  91  this year, has heard that the mean systolic blood pressure among the elderly…

A: Given: Sample size (n)= 19 Sample mean x¯=130 Sample standard deviation (s) = 20 Hypothesized mean…

Q: A lab supply company sells pieces of Douglas fir 4 inches long and 1.5 inches square for force…

A: It is given that Population SD = 2000 Margin of error E = 500 The critical value of Z at 90%…

Q: Almost all medical schools require applicants to take the Medical College Admission Test (MCAT).  To…

A: It is given that the mean is 25 and the standard deviation is 6.5.

Q: The weight of newborn babies is normally distributed, with a mean of 3.7 kilograms and a standard…

A: GivenThe weight of new born babies are normally distributed.The mean =3.7 KgThe standard deviation…

Q: Condé Nast Traveler conducts an annual survey in which readers rate their favorite cruise ship. All…

A: given, Group1: The ships carry 500 passengers Sample size n1=37 Sample average rating x¯1=85.39…

Q: In a survey, 18 people were asked how much they spent on their child's last birthday gift. The…

A: From the provided information, Sample size (n) = 18 Sample mean (x̄) = 35.40 Standard deviation (s)…

Q: In a survey, 17 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: A market researcher wants to estimate the amount of money that a Christmass hopper will spend on…

A:

Q: A random sample of 43 cars in the drive-thru of a popular fast food restaurant revealed an average…

A: Given that mean=16.87

Q: The variable x is normally distributed with a mean of 500 and a standard deviation of 43. Find the…

A:

Q: mandatory competency test for high school sophomores has a normal distribution with a mean of  425…

A: Given that.   X~N( μ , ?)   μ=425     , ?=83   Z-score =( x - μ )/?

Q: A marketing specialist wants to estimate the average amount spent by visitors to an online…

A: In the field of marketing, it is crucial to understand the behavior of customers to design effective…

Q: A doctor wants to estimate the mean trigliceride level of all 20- to 29-year-old females (in…

A: Given data  Margin of error (E) = 3  95% ci for μ. S = 17.1 n = ?

Q: A random sample of 43 cars in the drive-thru of a popular fast-food restaurant revealed an average…

A: given data n = 43x¯ = 19.65σ = 5.7696% ci for μ = ?

Q: You would like to estimate the variance and standard deviation for credit scores based on FICO.…

A: Construct the 95% confidence interval estimate for the variance of credit scores Obtain the critical…

Q: The average triglyceride level of adult males is 126 milligrams per deciliter. You want to determine…

A: Step 1: From the provided information, Step 2:Hypotheses and test statistic:The hypotheses can be…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.