Start your trial now! First week only $4.99!*arrow_forward*

Question

Testing Claims About Variation. In Exercises 5–16, test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, or critical value(s), then state the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. Assume that a simple random sample is selected from a normally distributed population.

Pulse Rates of Men A simple random sample of 153 men results in a standard deviation of 11.3 beats per minute (based on Data Set 1 “Body Data” in Appendix B). The normal range of pulse rates of adults is typically given as 60 to 100 beats per minute. If the range rule of thumb is applied to that normal range, the result is a standard deviation of 10 beats per minute. Use the sample results with a 0.05 significance level to test the claim that pulse rates of men have a standard deviation equal to 10 beats per minute; see the accompanying StatCrunch display for this test. What do the results indicate about the effectiveness of using the range rule of thumb with the “normal range” from 60 to 100 beats per minute for estimating σ in this case?

Tagged in

Math

Statistics

Find answers to questions asked by students like you.

Q: What plots did we use in this module to decide whether it is reasonable to presume that assumptions ...

A: The residual plots are useful to decide if the assumptions for multiple linear regression inferences...

Q: Drone Deliveries Based on a Pitney Bowes survey, assume that 42% of consumers are comfortable having...

A: From the given information:The probability that the consumers are comfortable having drones is p = 0...

Q: Corporate Farms. The U.S. Census Bureau estimates the mean value of the land and buildings per corpo...

A: Click to see the answer

Q: Sampling with Replacement The Orangetown Medical Research Center randomly selects 100 births in the ...

A: The 100 births are randomly selected and the proportion of boys is recorded. Also, the birth rates a...

Q: For the standard normal curve, find the z-score(s) a. that has area 0.30 to its left.b. that has are...

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

Q: College Presidents There are about 4200 college presidents in the United States, and they have annua...

A: a)The distribution of the sample mean is approximately normal because the samples are of the same si...

Q: In each of Exercises, we have provided a sample mean, sample size, and population standard deviation...

A: The test hypotheses are given below:Null hypothesis:H0: µ = 22,Alternative hypothesis: Ha: µ > 22...

Q: Finding P-values. In Exercises 5–8, either use technology to find the P-value or use Table A-3 to fi...

A: Given info: The claim is that for Version data speeds at airports with the mean 14 mbps, the sample ...

Q: Lightning Deaths The accompanying bar chart shows the numbers of lightning strike deaths broken down...

A: The bar chart for the number of lightning strike deaths broken down by gender for a recent period of...

Q: Suppose that a simple random sample is taken from a normal population having a standard deviation of...

A: a) From the provided information, the sample size (n) = 4The standard deviation (σ) = 10The z value ...

Q: What plots did we use in this module to decide whether it is reasonable to presume that the assumpti...

A: The residual plots are useful to decide if the assumptions for multiple linear regression inferences...

Q: Durations of Pregnancies The lengths of pregnancies are normally distributed with a mean of 268 days...

A: a)The random variable x represents the duration of the pregnancy.The formula to convert the x value ...

Q: Why is sampling often preferable to conducting a census for the purpose of obtaining information abo...

A: Taking a sample is speedy and more cost effective than carrying out a census, and more knowledge abo...

Q: In Exercises, X denotes a binomial random variable with parameters n and p. For each exercise, indic...

A: Consider X be a random variable which follows binomial distribution with parameters n and p. The nor...

Q: In each of Exercises, we have provided a sample mean, sample size, and population standard deviation...

A: The test hypotheses are given below:Null hypothesis:H0: µ = 22,Alternative hypothesis: Ha: µ > 22...

Q: When estimating an unknown parameter, what does the margin of error indicate?

A: Margin of error:Margin of error is a range of values that lie above and below the sample statistic o...

Q: Change for a Quarter How many different ways can you make change for a quarter? (Different arrangeme...

A: The number of coins that are less than a quarter in terms of money is three. They arePenny ($0.01)Ni...

Q: How hot does it get in Death Valley? The following data are taken from a study conducted by the Nati...

A: Mean:The formula for finding mean is shown below:

Q: Testing Claims about Proportions. In Exercises, test the given claim. Identify the null hypothesis,...

A: Given Data:Smoking = 39Not Smoking = 32Therefore,n = 39+32 = 71x = 39Sample proportion =

Q: In Exercises, we have given the value obtained for the test statistic, z, in a one-mean z-test. We h...

A: a).The p-value can be obtained by entering the formula “=1-NORM.S.DIST(1.24,TRUE)” in Excel:

Q: What is meant by saying that a 1-a confidence interval is a. exact?b. approximately correct?

A: a.Confidence Interval:Confidence interval is the interval estimate of the population parameter. It i...

Q: Standard Tests Standard tests, such as the SAT or ACT or MCAT, tend to make extensive use of multipl...

A: Solution: We are given:Standard tests, such as the SAT or ACT or MCAT, tend to make extensive use of...

Q: Testing Hypotheses. In Exercises 13–24, assume that a simple random sample has been selected and tes...

A: Click to see the answer

Q: Use the Poisson distribution to find the indicated probabilities Disease Cluster Neuroblastoma, a ra...

A: Note:Hey there! Thank you for posting the question. However, since your question has more than 3 sub...

Q: Whitus v. Georgia In the classic legal case of Whitus v. Georgia, a jury pool of 90 people was suppo...

A: Given dataTotal no of people = 90Probability of selecting a minority = 0.27As per Binomial theorem

Q: Suppose that a sample is to be taken without replacement from a finite population of size N. If the ...

A: a).Since the sample is to be taken without replacement, there is a possibility of only one sample. B...

Q: Births: Sampling Distribution of Sample Proportion When two births are randomly selected, the sample...

A: The two births are randomly selected, the sample space for genders is bb, bg, gb, gg (where b = boy ...

Q: The boxplot below shows salaries for Construction workers and Teachers. Construction Teacher 20 25 3...

A: The box plot contains 5-number summary. That is, the minimum value, the first quartile, the second q...

Q: Technology. In Exercises 9–12, test the given claim by using the display provided from technology. U...

A: The null and the alternative hypotheses are,H0: µ=0 (The mean prediction error is equal to zero.)H1:...

Q: For a t-curve with df = 21, find each t-value, and illustrate your results graphically. a. The t-val...

A: Click to see the answer

Q: In each of Exercises, we have provided a scenario for a hypothesis test for a population mean. Decid...

A: The conditions for using standard normal distribution based on sample size are as follows:If the sam...

Q: A simple random sample of size 100 is taken from a population with unknown standard deviation. A nor...

A: The following assumptions are required for the small sample confidence interval about mean to be val...

Q: In each of Exercises, we provide a sample mean, sample size, sample standard deviation, and condence...

A: Given datax̅ = 25, n = 36, s = 3, confidence level= 95%

Q: Explain why the margin of error determines the accuracy with which a sample mean estimates a populat...

A: Margin of Error: The margin of error is defined as a statistic which gives the amount of sampling er...

Q: What role does the decision criterion play in a hypothesis test?

A: Decision criterion:If the p-value of the test is less than or equal to the level of significance, re...

Q: Determine whether or not the procedure described below results in a binomial distribution. If it is ...

A: It is given that 600 voters with two political parties A and B are selected from a population of 6,0...

Q: What a Word! One of the longest words in standard statistics terminology is “homosce-dasticity.” How...

A: Solution: We are given the longest words in standard statistics terminology is “homosce-dasticity.W...

Q: Could you help me solve and understand d-f?

A: d.The required value is calculated as follows:

Q: What is a confidence-interval estimate of a parameter? Why is such an estimate superior to a point e...

A: Confidence Interval:Confidence interval is the interval estimate of the population parameter. It is ...

Q: Instagram Poll In a Pew Research Center poll of Internet users aged 18–29, 53% said that they use In...

A: a).In a Pew Research Center poll of internet users aged 18–29, 53% use Instagram. The level of signi...