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Which statement is true? A sample statistic can never be equal to the population parameter. Point estimates are defined for both samples and populations. To calculate a sample proportion, we need to know the population size. To calculate a point estimate, we need to know the sample size

Answer: Option C is true. To calculate a sample proportion, we need to know the population size. Step-by-step explanation: To calculate a sample proportion, we need to know the population size. – This is the true statement. A sample statistic can never be equal to the population parameter. This is …

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Samples of size n = 90 are randomly selected from the population of numbers (0 through 9) produced by a random-number generator, and the variance is found for each sample. What is the distribution of the sample variances?

Answer: chi square distribution with df = n-1 Step-by-step explanation: Given that sample of size n=90  are randomly selected from the population of numbers (0 through 9) produced by a random-number generator Since sample size is large and randomness is followed we can assume that the variable follows a normal …

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Match the careers with the job tasks. Tiles 1.agricultural technician 2.hydroelectric technician 3.home appliance repairman 4.textile tender Pairs A.analyzes water for environmental issues, such as drought, pollution, or erosion B.gathers crop or animal samples for scientific testing C.operates and tends cutting machines for various textiles D. troubleshoots and repairs faulty machinery and equipment

Technician is a worker trained with special skills, especially in science and engineering. 1. Agricultural technician – gathers crop or animal samples for scientific testing. (Agricultural: used for farming or relating to farming.) 2. Hydorelectric technician – Analyzes water for envinromental issues, such as drought, pollution, or erosion. (Hydroelectric – …

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PLEASE RESPOND QUICK WITH THE CORRECT ANSWER OR YOU WILL GET REPORTED (08.03)Magdeline wants to know if the number of words on a page in her computer science book is generally more than the number of words on a page in her math book. She takes a random sample of 25 pages in each book and then calculates the mean, median, and mean absolute deviation for the 25 samples of each book. Book Mean Median Mean Absolute Deviation Computer science 48.7 40 9.4 Math 34.2 45 1.9 She claims that because the mean number of words on each page in the computer science book is greater than the mean number of words on each page in the math book, the computer science book has more words per page. Based on the data, is this a valid inference?

Employee                                 Mary      Zoe         Greg         Ann           Tom Cumulative Pay                       …

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As the product life cycle curve approaches the decline state, a company can attempt to jumpstart the curve again by doing which of the following? find new users and new uses increase the size of their sales force increase the advertising budget increase free samples as incentives to buy none of the above

The Contribution Margin per unit (CM) can be calculated from the difference of Selling Price per unit (SP) and Total Expenses per unit (TE).   First, let’s calculate the value of SP: SP = Sales / Units sold SP = $1,043,400 / 22,200 units sold SP = $47   Second, …

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The manager of a warehouse would like to know how many errors are made when a product’s serial number is read by a bar-code reader. Six samples are collected of the number of scanning errors: 36, 14, 21, 39, 11, and 2 errors, per 1,000 scans each. What is the mean and standard deviation for these six samples?

Answer: Number of copy machines must be made to minimize the unit cost=160. Step-by-step explanation: We are given that the unit cost function C ( the cost in dollars to make each copy machine) If machines are made =x Then the unit cost function is given by We have to …

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The weight of 100 identical samples of a substance is 0.01 pound. What is the weight of 10,000 samples?

A delivery of 3 large boxes and 5 small boxes has a total weight of 135 kilograms.3l + 5s = 135A delivery of 9 large boxes and 7 small boxes has a total weight of 279 kilograms9l + 7s = 279 Another of the same type of thing, two variables, …

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The director of a customer service center wants to estimate the mean number of customer calls the center handles each day, so he randomly samples 26 different days and records the number of calls. the sample yields a mean of 258.4 calls with a standard deviation of 32.7 calls per day. the 95% confidence interval for the mean number of calls per day has an upper bound of ________. (round your answer to 1 decimal place.)

First we calculate for the total number of possibilities (permutation) to select 4 disks from the container: Total number of possibilities = 10 * 9 * 8 * 7 Total number of possibilities = 5040 Now let us find the 4 disks that will result in a range of 7. …

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An experiment is designed to determine if the amount of sugar in a drink affects the likelihood that bees will be attracted to it. Sample A is 100 mL of pure water. Sample B is 100 mL of water with 1 gram of sugar dissolved in it. Sample C is 100 mL of water with 2 grams of sugar dissolved in it. All samples are placed on a picnic table. One observer is assigned to each drink. The observers count the number of bees that visit the drink during a 15-minute interval.

Answer: c. Count the number of tomatoes that are produced by a tomato plant that is grown in clay soil, and compare it to the number of tomatoes that are produced by a tomato plant that is grown in sandy soil. Explanation: Scientific design is like a detail procedure for …

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Which example best represents the use of creativity in scientific inquiry? replicating Pasteur’s experiments by using vintage equipment using a computer spreadsheet program to process data and make graphs increasing the efficiency of a pharmaceutical factory developing a new way to extract a particular protein from tissue samples

Answer; -Developing a new way to extract a particular protein from tissue samples Explanation; -Scientific inquiry is a thoughtful and coordinated attempt to search out, describe, explain and predict natural phenomena. · Scientific inquiry progresses through a continuous process of questioning, data collection, analysis and interpretation. -Scientific inquiry requires the …

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Scientists determined the historic levels of carbon dioxide in the Earth’s atmosphere by _____. 1. testing air bubbles in Antarctic ice 2. testing soil samples all over the world 3. evaluating tree ring growth 4. mapping the growth of redwood trees

Scientists determined the historic levels of carbon dioxide in the Earth’s atmosphere by _____. 1. testing air bubbles in Antarctic ice 2. testing soil samples all over the world 3. evaluating tree ring growth 4. mapping the growth of redwood trees

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In this experiment, you will determine which of four variables affect the breakdown of rock samples. To do that, you will change one variable at a time and then measure the change in mass of the rock sample. In the space below, write a scientific question you will answer by doing this experiment.

Antipsychotic drugs are used to control psychosomatic symptoms, mostly in illnesses such as schizophrenia, bipolar disorder and dementia. However, antipsychotics also cause different side effects such as: ·         Muscle spasms ·         Weight gain ·         Dry mouth ·         Drowsiness ·         Sexual dysfunction It is important for physicians to be careful of …

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Betty’s Bite-Size Candies are packaged in bags. The number of candies per bag is normally distributed, with a mean of 50 candies and a standard deviation of 3. At a quality control checkpoint, a sample of bags is checked, and 4 bags contain fewer than 47 candies. How many bags were probably taken as samples?

Betty’s Bite-Size Candies are packaged in bags. The number of candies per bag is normally distributed, with a mean of 50 candies and a standard deviation of 3. At a quality control checkpoint, a sample of bags is checked, and 4 bags contain fewer than 47 candies. How many bags …

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