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

A:

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: 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.