Question 2: Week 7, hypothesis testing I (for one sample) | 10 marks When you write this section, remember to

(a) State the null (Ho) and alternative (Ha) hypotheses. Explain briefly what they mean.

(b) Does it involve a one-tailed test or a two-tailed test? Why do you say that?

(c) What is your calculated t-score? What is the critical t-score?

(d) Assess the calculated and critical t-scores (as sentences in a paragraph): based on their values, will you keep the Ho or reject it and go for Ha?

(e) Interpret: what does your chosen hypothesis say (the findings)? Next, what business advice would you provide?

X WPS Ollig ESTA101A-Week..xcel Challenge STA101A - Indiv...- Sept 2020 (1) X + 2 google... Go Premium Exit Full Screen N22 @fx A B D F H K M N 1 2 2. H2Coco is an Australian coconut water company. It sells packaged coconut water in Australian supermarkets. It faces stiff competition from other packaged drinks producers who also sell their drinks in the supermarkets. . Coco REAL CRCICE 3 4 G C AN 5 6 7 8 9 To make its marketing more effective H2Coco wants to make a bold claim on its packaging of this nature: "Today, Australions are consuming significantly less water on average: thon the recommended 8 glasses o day. Don't be one of them. Be a H2Aussie. Hydrate yourself instantly with H2COCO." COLLAGEN & PREBIOTICS But is it true Australians are drinking a lot less than is recommended? To be sure and to not be criticised by its rivals, you, as HZCoco's marketing executive did a quick survey of 105 Australians sampled at random (see data below, right). 'You asked them how many glasses of water they drank o day on average. Analyse it. Can you advise the team to go ahead with that bold advertising claim? Or not? 10 11 12 13 14 15 16 1/ 18 19 20 21 HE? ? Null hypothesis (Ho): Alternative hypothesis (Ha): One tail or two tail? ? ? Calculated t-score: Critical t-score: ? ? 'What's your decision on Ho and Ha? How will you state your findings? ? ? ? What business advice would you give the company based on your findings? ? 22 23 24 25 26 27 28 29 30 31 32 33 34 Data from a random selection of 60 Australians: Glasses of water consumed daily (on average) 8.5 8 9 9 7.5 7.5 10 6 9 7 9 8 7 Introduction Q1 - Chi-squared test Q2. Hypothesis testing! Q3 - Hypothesis testing il X WPS Office STA101A-Week..xcel Challenge 5 STA1011 - Indiv...- Sept 2020 (1) X + 2 google... Go Premium Exit Full Screen J34 @fx fx 7 A B C D F F H H 1 K 1 M N 8 35 36 37 39 7 8 6 6 6 7.5 8 8 9 7 9 7.5 8 6 7 7 40 41 42 43 41 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 7.5 6 8 7 6 6 6 6 7 9 6 63 64 9 6.5 5 8 5 7 1 65 66 67 68 6 Introduction Q1 - Chi-squared test Q2. Hypothesis testing! Q3 - Hypothesis testing il + X WPS Office E STA101A-Week...xcel Challenge 5 STA1011 - Indiv...- Sept 2020 (1) X + 2 google... Go Premium Exit Full Screen J68 @fx fx 6 A B B C D F F H H 1 M N 69 9 10 7 4 8 6 5.5 9. 8 8 5 1 8 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 Introduction Q1 - Chi-squared test Q2. Hypothesis testing! Q3 - Hypothesis testing il