Direction: Read and analyze the given problem. Supply the data being asked for on the items that follow:. Effects of drug and alcohol on the nervous system have been the subject of significant research. A neurologist wants to test the effect of a drug by injecting 100 rats with a unit dose of the drug, subjecting each rat to stimulus, and recording its response time. It has been found out that = 1.05 and s = 0.50. The mean response time of a rat not to respond is 1.2 seconds with a standard deviation of 0.70. She wishes to test whether the mean response time for drug-injected rats differ from 1.2 seconds. Assume that the population is normal using a = 0.05, answer the following questions: 1. null and altenati ve hypothesis 2. test of hypothes is 3. level of significance 4. population standard deviation 5. sample standard deviation 6. number of sa.mple 7. test statistic 8. critical value 9. rejection region 10. show the graph 11. decision 12. conclusion

Q: A retail store is considering adding a new product line to its inventory. The store wants to know…

A: Sample size, N = 125favourable cases, x=70Confidence level, cl = 0.90level of significance,  = 0.10

Q: At a large industrial plant, employees were classified according to age and given a leadership exam.…

A: Hypothesis testing is an inferential procedure of testing a claim about a population characteristic.

Q: Why should I learn statistics?

A: Statistics helps us to describe and organize data. It also helps us to make inferences from data.

Q: Highlight the precautions for use of secondary data

A: The objective of this question is to understand the precautions that need to be taken while using…

Q: Explain why study statistics?

A:

Q: What is the drawback of summarizing the data using the median

A: Median: Median is the middle value of the set of numbers. The set of numbers should be arranged in…

Q: Explain how can we find the corresponding z-score of an area and a percentile.

A:

Q: Explain why the minimum and maximum observations are added to the three quartiles to describe better…

A: Quartile: Quartiles are the values which divides the data into four equal parts. First quartile:…

Q: which is more meaningful in ranking academic performance quartiles or deciles

A: A data set's quartiles divide the data into four equal parts, each containing one-fourth of the data…

Q: Explain the two types of observation as used in statistics

A: There are two types of observations: 1) Qualitative observations 2) Quantitative observations

Q: When trying to summarize a set of numerical data, why is giving a measure of center such as the mean…

A: Introduction: A measure of central tendency of data is a measure of the tendency of the values to…

Q: how does the sample and population relate?

A: Sample and population both are different items, but both are related with each other. Population is…

Q: What are the four levels of measurement scales for variables in statistics?

A: Introduction The measurement scale of a variable in statistics is an important factor that…

Q: You can calculate an average/mean of qualitative data. True or False

A: mean , median and measure of spread  can't be calculated for qualitative data, because no natural…

Q: What is statistics and why do you need to use statistics in your research? How important are they?

A: Statistics: Statistics is the branch of mathematics that deals with the collection of data,…

Q: Describe about the measurement of variability for qualitative and ranked data?

A:

Q: How do you find the average, spread, and outliers for quantitative data set?

A: The most frequently used measure to find average for quantitative data set is mean, median and mode.…

Q: ?

A: Statistic is similar to mathematics but it can be applied in practical situations. Example, if there…

Q: Explain Testing a Single Mean for significance?

A: Z-test for significance of a single mean: The z-test is appropriate when population standard…

Q: Why is the median less affected by skewed data than the mean?

A: Mean: The average values of the total observations. Median: The value that divided data set into two…

Q: Explain the difference between “bias”, “error”, and “precision”. Be sure your definition explains…

A: Given information: Bias, error, and Precision

Q: What are application of statistics and math?

A: Statistics help in providing data as well as tools to analyze the data. Some powerful techniques are…

Q: An investigator decided to conduct a research to describe the average number of females in each…

A: The number or values calculated from the sample data are called sample statistics. The number or…

Q: The sample mean or sample proportion is unbiased estimator to the population proportion in case of…

A: The sample mean or sample proportion is unbiased estimator to the population proportion in case of…

Q: Why is it important to understand the level of measurement of a variable in statistics?

A: We have to write the importance to understand the level of measurement of a variable in statistics:…

Q: Using excel the median is 16.70 but when I calculate it manually it comes to 13.9. Why is excel…

A:

Q: what the use of Statistics in your life is. How are you going to be benefitted by studying…

A: Statistics is the science which deals with the collecting, classifying, presenting , comparing and…

Q: what are the four imporatant sources of data?

A: In statistics, data is the raw information from which statistics are created. This data can be…

Q: How will a high outlier in a data set affect the mean and median?

A: There is the effect of an outlier on the median value.

Q: How to determine to cut ap value in statistics?

A: P-value: The p-value is a measure of degree of the evidence against the null hypothesis. The…

Q: hat is a percentile and how do we plot them on box and whisker plots?

A: Percentile is the value in statistics which divides the population in two groups. The certain…

Q: Which of the three measurements, mean, median, or mode, is the most influenced by an outlier value…

A: Outlier in a data set is the value which is much higher than or lower than almost all other values.…

Q: Is theory essential to the research process and statistics? Please Explain.

A: Introduction about Theory: Theory can be defined as the idea or concept that has no proof. It could…

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.