Math

StatisticsQ&A LibraryAmong 157 African-American men ,the mean systolic blood pressure was 146 mm Hg with a standard deviation of 27. We wish to know if on the basis of these data, we may conclude that the mean systolic blood pressure for a population of African-American is greater than 140. Use α=0.01. Solution 1. Data: Variable is systolic blood pressure, n=157 , sample mean=146, s=27, α=0.01.Start your trial now! First week only $4.99!*arrow_forward*

Question

**Question (1)**.Among 157 African-American men ,the mean systolic blood pressure was 146 mm Hg with a standard deviation of 27. We wish to know if on the basis of these data, we may conclude that the mean systolic blood pressure for a population of African-American is greater than 140. Use α=0.01.

Solution **1**. Data: Variable is systolic blood pressure, n=157 , sample mean=146, s=27, α=0.01.

Tagged in

Math

Statistics

Find answers to questions asked by students like you.

Q: The average amount of money spent for lunch per person in the college cafeteria is $6.82 and the sta...

A: 1. It is given that the distribution of money spent follow normal distribution with mean $6.82 and s...

Q: A researcher is conducting a Chi2 for Independence test to evaluate a relationship between gender (i...

A: State the hypotheses. Null hypothesis: Alternative hypothesis:

Q: In a sample of 450 adults, 284 had children. Construct a 90% confidence interval for the true popula...

A: The best point estimate of the population proportion is the sample proportion. It was found that out...

Q: 1. calculate the mean and standard deviation for this data set. Interpret the values you got. 2. Del...

A: X (x-xbar)^2 132 994.3511 192 810.3511 164 0.217778 111 2759.751 170 41.81778 159 20.551...

Q: (a) A researcher suggests that a reason individuals wait until the last five days is that on average...

A: Hi, the question has more than 3 parts. As per the guidelines I am obliged to answer first 3 parts o...

Q: Number 24

A: Solution: The data on the numbers of chirps in 1 minute and the corresponding temperatures in °F is ...

Q: A report states that adults 18- to 24- years-old send and receive 128 texts every day. Suppose we ta...

A: T- test (Two -tailed) is applicable

Q: The following information is obtained for a sample of 80 observations taken from a population. SS = ...

A: Given: Se=0.987α=0.03y^=164.68-2.88x Intercept=164.68 Slope=-2.88

Q: A gender-selection technique is designed to increase the likelihood that a baby will be a girl. In ...

A: Given information 911 births consist of 469 baby girls and 442 boys Let X denotes the number of girl...

Q: Please answer B, C, & D.

A: b. Claim: The mean wait time greater than for men who wear a tie. Null Hypothesis: H0: μ=14 Alternat...

Q: The New York Times published an article about a study in which Professor Denise Korniewicz and other...

A: From the provided information,

Q: The following are the P/E ratios (price of stock divided by projected earnings per share) for 17 ban...

A: The following are the P/E ratios (price of stock divided by projected earnings per share) for 17 ban...

Q: Vegetarians are much less common in the United States than in the rest of the world. Suppose in a 20...

A: Click to see the answer

Q: Arandom sample of 770 subjects was asked to identify the day of the week that is best for quality fa...

A: In the given output, the value of χ2 test statistic is 1384.851.

Q: The amount of coffee that people drink per day is normally distributed with a mean of 17 ounces and ...

A: 1. It is given that the amount of coffee that people drink per day follow normal distribution with m...

Q: Many people think that a national lobby's successful fight against gun control legislation is reflec...

A: Click to see the answer

Q: You measure 38 turtles' weights, and find they have a mean weight of 49 ounces. Assume the populatio...

A: Given information- Sample size, n = 38 Sample mean, x-bar = 49 ounces Sample standard deviation, σ =...

Q: The mean SAT score in mathematics, μ, is 564. The standard deviation of these scores is 50. A specia...

A: Given information- Sample size, n = 70 Population mean, µ = 564 Sample mean, x-bar = 579 Population ...

Q: A university dean is interested in determining the proportion of students who recieve some sor of fi...

A: Click to see the answer

Q: 1. In which of the following situations would unequal sample sizes in conditions of an ANOVA be prob...

A: Note: Hey there! Thank you for the question. As you have posted multiple questions together, accordi...

Q: A population of students earned test scores distributed normally with a mean of 65 and a standard de...

A: Let X denote the students earned test scores and it follows normal distribution with a mean of 65 an...

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of 1...

A: As the claim here is that the standard deviation of the number of accidents per day is no longer equ...

Q: Acme Trucking claims the average hourly salary of its mechanics is $9.25, with a standard deviation ...

A: Null Hypothesis: H0:μ≥9.25 Alternative Hypothesis: H1:μ<9.25 Given information: μ=9.25x¯=8.95σ=1....

Q: Assume that females have pulse rates that are normally distributed with a mean of u = 74.0 beats per...

A: From the provided information, Mean (µ) = 74.0 Standard deviation (σ) = 12.5 X~N (74.0, 12.5)

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

A: a) The confidence level is 99% Therefore, α = 0.01 and α/2=0.005. The margin of error is 0.05 Since ...

Q: D. What would be the slope and y-intercept for a regression line based on these data? E. What wouıld...

A: D. Regression: The regression analysis is conducted here by using EXCEL. The software procedure is...

Q: 63% of U.S. adults have very little confidence in newspapers. You and (c) less than four. (a) P(5) =...

A: Let X be the random variable such that number of U.S adults who have very little confidence in newsp...

Q: Does being part of a support group aﬀect the ability of people to quit smoking? A county health depa...

A: (a) The 2 x 2 contingency table is given as follows: Received nicotine patch +Met support group...

Q: You collect data on number of hours spent studying, on average, throughout the Fall 2020 semester fo...

A: Statement: The Statistical test used to compare the students at Stonehill and Holy Cross to look f...

Q: Consider the following hypothesis test. Ho:H = 15 H:u # 15 A sample of 50 provided a sample mean of ...

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...

Q: A player tosses three fair coins. He wins $5 if 3 heads occur, $3 if twoheads occur, and 1 if only o...

A: The probability distribution is as follows: fx=-2 x=181 x=383 ...

Q: A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey, c...

A: A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey, c...

Q: The amount of calories consumed by customers at the Chinese buffet is normally distributed with mean...

A: we are suppose to answer three sub parts .

Q: Thank you in Advance for quick response. Best,

A: Valid pdf property is applicable . ∫-∞∞f(x) dx = 1

Q: 3. A study examined the effect of protein consumption on weight gain in rats.Investigators obtained ...

A: Given, There are 61 female rats out of that 30 of them are low protein and other 31 to a high protei...

Q: The price per share of stock for a sample of 25 companies was recorded at the beginning of the firs...

A: Introduction: The 100 (1 – α) % confidence interval for the population mean, μ, when the population ...

Q: For a confidence level of 90% with a sample size of 31, find the critical t value.

A: The critical value for a t-statistic with n degrees of freedom evaluated, is a constant c such that ...

Q: Let Z be a standard normal random variable. Use the calculator provided, or this table, to determine...

A: From the provided information, P (-c ≤ Z ≤ c) = 0.9749

Q: A team of government researchers would like to determine whether a new tax on cigarettes has any eff...

A: From the provided information, Sample size (n) = 25 Sample mean (x̅) = 380 Sample standard deviation...

Q: You have a really annoying stapler that seems to randomly jam. On any given attempt to staple, it se...

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If y...

Q: An auto manufacturing company wanted to investigate how the price of one of its car models depreciat...

A: coefficient of determination: r=cov(x,y)σxσywhere cov(x,y)=∑(x-x_bar)(y-y_bar)nσx=(x-x_bar)2n-1σy=(y...

Q: Consider the following hypothesis test. HoiH2 70 HaiH< 70 A sample of 100 is used and the population...

A: Here, the population standard deviation is 12.So, the statistic is given by, Z = x - 7012100 = x - 7...

Q: The recidivism rate for convicted sex offenders is 16%. A warden suspects that this percent is highe...

A: Given : x = 72 n = 378 p^ = xn p^ = 72378 p^ = 0.191 α = 0.1 a) For this study, we should use one-sa...

Q: In a distribution where the mean is 70 and the standard deviation is 3, find the largest fraction of...

A: Here, Chebyshev's inequality is applicable as we don't have any information about the distribution

Q: About 5% of hourly paid workers in a region earn the prevailing minimum wage or less. A grocery cha...

A: (a) Obtain the probability that Company A will get the discount. The probability that Company A will...

Q: The patient director of Health plus clinic has just conducted a study of customer waiting time befor...

A: 1] The waiting time has an approximately normal distribution with mean (μ)=22.14 and standard deviat...