Abbi is a final year student in OxfordUniversity doing her dissertation. After discussing with her supervisor, her research objective is to estimate the relationship between returns of stocks and level of risk of stocks (i.e. standard deviation of stock returns). Abbi is using primary data and secondary data for her research.   Date Tesco Stock Price 01/05/2019 220.0 01/06/2019 224.1 01/07/2019 220.7 01/08/2019 216.6 01/09/2019 238.2 01/10/2019 232.5 01/11/2019 229.4 01/12/2019 255.2 01/01/2020 246.9 01/02/2020 228.5 01/03/2020 228.8 01/04/2020 218.8 03/04/2020 223.9 In her dissertation, Abbi states that primary data is qualitative data. Is it correct? If not, how would you explain to Abbi? The monthly percentage change on 01/04/2020?( explain how you calculate in excel, which formula you use).     thank you in advance

why is one standard error unit not a good choice for the error bars that relate to the trendline?

When you have significant results in data analysis, it is not necessary to report all relevant means and standard deviations.   True or false

Why do we need to study variability? Can you give a 'real life' example?

A psychologist is studying the self image of smokers, as measured by the self-image (SI) score from a personality inventory. She would like to examine the mean SI score, μ, for the population of all smokers. Previously published studies have indicated that the mean SI score for the population of all smokers is 82and that the standard deviation is 12, but the psychologist believes that the value for the mean has decreased. She plans to perform a statistical test. She takes a random sample of SI scores for smokers and computes the sample mean to be 7.Based on this information, answer the questions below. What are the null hypothesis (H0) and the alternative hypothesis (H1) that should be used for the test?H0: μ is ?less than less than or equal togreater thangreater than or equal to not equal toequal to ? 82 74 12 H1: μ is ?less thanless than or equal togreater thangreater than or equal tonot equal toequal to ? 82 74 12 In the context of this test, what is a Type II error?A Type…

A psychologist is studying the self image of smokers, as measured by the self-image (SI) score from a personality inventory. She would like to examine the mean SI score,  μ , for the population of all smokers. Previously published studies have indicated that the mean SI score for the population of all smokers is  80  and that the standard deviation is  12 , but the psychologist believes that the value for the mean has decreased. She plans to perform a statistical test. She takes a random sample of SI scores for smokers and computes the sample mean to be  74 . Based on this information, answer the questions below. What are the null hypothesis ( H0 ) and the alternative hypothesis ( H1 ) that should be used for the test? H0 :  μ  is ?less thanless than or equal togreater thangreater than or equal tonot equal toequal to ?748012 H1 :  μ  is ?less thanless than or equal togreater thangreater than or equal tonot equal toequal to ?748012In the…

Please

What is the TWO SOURCES OF VARIABILITY?

When Emma commutes to work, the amount of time it takes her to arrive is normally distributed with a mean of 53 minutes and a standard deviation of 5 minutes. What percentage of her commutes will be shorter than 62 minutes, to the nearest tenth? Statistics Calculator

J.P. Morgan Asset Management publishes information about financial investments. Over the past 10 years, the expected return for a core bonds fund was 5.78% with a standard deviation of 2.13%.† J.P. Morgan Asset Management also reported that the expected return for real estate investment trusts (REITs) was 13.07% with a standard deviation of 23.17%. The correlation between core bonds and REITs is −0.04. (Past performance is no guarantee of future results.) You are considering portfolio investments that are composed of a core bonds fund and REITs. a. Using the information provided, determine the covariance between core bonds and REITs. (Round your answers to three decimal places.) covariance = b. Construct a portfolio that is 50% invested in a core bonds fund and 50% invested in REITs. In percentage terms, what are the expected return and standard deviation for such a portfolio? (Round your answer for the standard deviation to two decimal places.) expected return = standard deviation =…