TEST TWO QUESTION ONE la) In bullet form, highlight some of the merits and demerits of using personal interviews as a means of raw data collection. marks) (10 1b) Differentiate between ratio and interval data. Give examples for each. (5 marks) used. 1c) Define and give a business example of where stratified random sampling can be appropriately (5 marks) 1d) Explain the role of Statistics in decision making process. (5 marks) le) Quality data collection is critical for sound and rational decision making. In view of this remark, what are some of the challenges you are likely to confront as a manger when making decision using secondary data? (5 marks) If) Suppose a survey question is worded; "What is your marital status? " The possible answers were as follows: 1) never married 2) married 3) live with partner 4) divorced or separated 5) widow or ? ? ? widower. How well do these categories adhere to the principles of inclusion and exclusion? Justify your answer. (5 marks) 1g) A random sample of current MBA students was taken and the initials of those with two first names were captured as follows: GK; EJ; BJ; AB; AJ; BG; JK; BK; EK; BE; AG; AK; AE; ES; J. Summarise these initials and present them using an appropriate display/graph. (5 marks) 1h) Assume you have just been elevated to be Head of the Research and Development Department of your a firm. You first major task is to gather views from the public about the multi-currency regime. How would you go about it? (Data type to be collected and method of collection). Justify your answer. (5 marks) 11) Classify each of the following data as: interval, ratio, ordinal and nominal. (1) Type of cars bought for management staff by UZ. (ii) Log standing of teams in the Barclays Premier League. (iii) Temperatures recorded for the past two days. Travelling speed of a car between Harare and Marondera. (5 marks) (iv) (v ) Goals scored by Scored by Messi in Laliga this season