MathStatisticsQ&A LibraryIn each of Exercises, use the technology of your choice to decide whether applying the t-test to perform a hypothesis test for the population mean in question appears reasonable. Explain your answers. Capital Spending. An issue of Brokerage Report discussed the capital spending of telecommunications companies in the United States and Canada. The capital spending, in thousands of dollars, for each of 27 telecommunications companies is shown in the following table. 9,310 2,515 3,027 1,300 1,800 70 3,634 656 664 5,947 649 682 1,433 389 17,341 5,299 195 8,543 4,200 7,886 11,189 1,006 1,403 1,982 21 125 2,205

Question

In each of Exercises, use the technology of your choice to decide whether applying the t-test to perform a hypothesis test for the population mean in question appears reasonable. Explain your answers.

**Capital Spending.** An issue of Brokerage Report discussed the capital spending of telecommunications companies in the United States and Canada. The capital spending, in thousands of dollars, for each of 27 telecommunications companies is shown in the following table.

9,310 | 2,515 | 3,027 | 1,300 | 1,800 | 70 | 3,634 |

656 | 664 | 5,947 | 649 | 682 | 1,433 | 389 |

17,341 | 5,299 | 195 | 8,543 | 4,200 | 7,886 | 11,189 |

1,006 | 1,403 | 1,982 | 21 | 125 | 2,205 |

Tagged in

Math

Statistics

Find answers to questions asked by students like you.

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

A: The binomial probability is converted to a normal distribution probability by using the continuity c...

Q: Write 11^1 backwards

A: Hi! I am solving the given question in two ways. 11^1=11. The backward number is 11. Thus, the backw...

Q: The rule of thumb for using the normal approximation to the binomial is that both np and n(1 - p) ar...

A: In this case, we need to explain the reason for the restriction for rule of thumb for using the norm...

Q: Data was collected for 300 fish from the North Atlantic. The length of the fish (in mm) is summarize...

A: Given data

Q: Counting with Fingers How many different ways can you touch two or more fingers to each other on one...

A: Click to see the answer

Q: Composite Sampling. Exercises 33 and 34 involve the method of composite sampling, whereby a medical ...

A: GivenA person aged 15-49 are infected with HIV is 1%.The probability that a person aged 15 - 49 is w...

Q: Win $1 Billion Quicken Loans offered a prize of $1 billion to anyone who could correctly predict the...

A: a. Number of games required to get 1 championship team from the field of 64 teams:There are 64 teams...

Q: What does the variance of a random variable measure? What is the standard deviation of a continuous ...

A: Variance of a random variable measures how far a set of (random) numbers are spread out from their a...

Q: Guilty or Innocent? In the U.S. court system, a defendant is assumed innocent until proven guilty. S...

A: Click to see the answer

Q: Here is a data set: 5740 7020 7550 6370 5850 7320 4410 6830 8180 6770 6690 8890 5290 8890 5...

A: There are total 28 sample ranges from 4410 to 8890The clad width can be calculate as

Q: Provide two synonyms for “the distribution of all possible sample means for samples of a given size....

A: Sampling distribution of a sample mean:

Q: ow old are professional football players? The 11th Edition of The Pro Football Encyclopedia gave the...

A: The descriptive statistics are calculated in EXCEL. The software procedure is as follows.Enter the d...

Q: State two of the main reasons for studying the normal distribution.

A: The two main reasons for studying the normal distribution are as follows:The normal distribution is ...

Q: Identify two possibleways inwhich conditional probabilities can be computed.

A: Justification:The conditional probability Rule

Q: Radioactive Decay Radioactive atoms are unstable because they have too much energy. When they releas...

A: a.For cesium-137, it was found that 1,000,000 radioactive atoms decayed to 977,287 in 365 days. That...

Q: Whta kind of plot is useful for deciding whether it is reasonable to find a regression plane for a s...

A: Scatterplot matrix:It is a collection of scatterplots organized into a matrix. Each scatterplot show...

Q: Suppose that you have obtained data by taking a random sample from a population. Before performing a...

A: For a random sample that is selected from a population, the following steps have to be done in order...

Q: Consider a one-mean z-test. Denote z0 as the observed value of the test statistic z. If the test is ...

A: a)P-value for left tailed test:

Q: What kind of plot is useful for deciding whether it is reasonable to find a regression plane for a s...

A: Scatterplot matrix:A scatterplot matrix is an array or a collection of scatterplots, consisting of a...

Q: Paint Durability. A paint manufacturer in Pittsburgh claims that his paint will last an average of 5...

A: Central Limit Theorem for mean:If a random sample of size n is taken from a population having mean µ...

Q: In each of Exercises, assume that the population standard deviation is known and decide whether use ...

A: Assumptions for using z interval procedure: The z statistic is used when the sample size is large (&...

Q: In each of Exercises, we have given the P-value for a hypothesis test. For each exercise, refer to T...

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

Q: In each of Exercises, use the technology of your choice to decide whether applying the t-interval pr...

A: The sample size (n) 10 is small, therefore, the t-interval procedure to obtain a confidence interval...

Q: Redundancy Using Braun battery-powered alarm clocks, the author estimates that the probability of fa...

A: a)

Q: Wildfires. Wildfires are uncontrolled fires that usually spread quickly and are common in wilderness...

A: The Boxplot and Histogram for the given data can be obtained as follows:Step-by-step procedure to ob...

Q: The boxplot below shows salaries for CPAS and Actuaries in a town. CPA Actuary 25 30 35 40 45 50 55 ...

A: From the boxplot of CPA, the value of median salary for CPA is = 45From the boxplot of Actuary, the ...

Q: In each of Exercises, explain the effect on the margin of error and hence the effect on the accuracy...

A: Effect on margin of error:If the sample size decreases, then the standard error of statistic increas...

Q: Here is a data set summarized as a stem-and-leaf plot: 6# | 22455599 7# | 0001111133455688 8# | 0335...

A: The number of data values are in this data set is obtained below:From the given stem and leaf plot, ...

Q: A committee of 5 is to be selected from a group of 6 men and 9 women. If the selection is made rando...

A: The total number of women is 9.The total number of men is 6.The number of people selected at random ...

Q: The Wind Mountain excavation site in New Mexico is an important archaeological location of the ancie...

A: a.The class width is calculated as follows:

Q: Poverty and Dietary Calcium. Calcium is the most abundant mineral in the human body and has several ...

A: In this case, consider the distribution of the calcium intakes of adults with incomes below the pove...

Q: The P-value for a hypothesis test is 0.06. For each of the following significance levels, decide whe...

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

Q: Define a. normally distributed variable.b. normally distributed population.c. parameters for a norma...

A: a.Normally distributed variable: If the distribution has the shape is normal curve then it is said t...

Q: Mean and Standard Deviation Find the mean and standard deviation for the numbers of girls in 8 birth...

A: The data is provided for the probability for the number of girls in 8 births.The mean can be obtaine...

Q: Wild Card Lottery The Wild Card lottery is run in the states of Idaho, Montana, North Dakota, and So...

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

Q: • Question 2 C 0/1 pt 56 O Details The boxplot below shows salaries for Actuaries and CPAS. CPA Actu...

A: Solution: We are given the below information in the question:

Q: Discuss the relationship between the margin of error and the standard error of the mean.

A: Click to see the answer

Q: Does the sample size have an effect on the standard deviation of all possible sample means? Explain ...

A: Sampling distribution of a sample mean:

Q: Determine and sketch the area under the standard normal curve that lies a. to the left of -3.02.b. t...

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

Q: In each of Exercises, we have given the P-value for a hypothesis test. For each exercise, refer to T...

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

Q: Answer true or false and explain your answer: If it is important not to reject a true null hypothesi...

A: Yes, it is important not to reject a true null hypothesis, the hypothesis test should be performed a...

Q: Gestation Periods of Humans. For humans, gestation periods are normally distributed with a mean of 2...

A: Hello there, I have used excel to generate the Random no of 2000 sample of size 9 each.It is not pos...

Q: Gender-Selection Method As of this writing, the latest results available from the Microsort YSORT me...

A: Answers will vary. One of the possible answers is given below:Step-by-step software procedure to gen...

Q: A simple random sample is taken from a population and yields the following data for a variable of th...

A: Point estimate:Point estimate is the single value obtained from point estimation on a set of sample ...

Q: Flashlight Battery Lifetimes. A brand of ashlight battery has normally distributed lifetimes with a ...

A: The probability of a random battery lasting longer than 25 hours:

Q: In each of Exercises, use the technology of your choice to decide whether applying the t-interval pr...

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

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

A: From the given information,consider, X be a binaomial random variable with parameers n and p that is...

Q: In each of Exercises, define the term given nonrejection region

A: Critical Region:The critical region is also known as α region. In the critical region, the null hypo...

Q: South Carolina Pick 3 In South Carolina’s Pick 3 lottery game, you can pay $1 to select a sequence o...

A: Hello there! there are more than three subparts in the question. According to our policies we cannot...