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Hints offered by R Barrowman
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Paper 1
Question 1
Hint 1: How much fruit and veg a day does the government recommend you eat?
Hint 2: Scale up one bit at a time, per day, per week… and so on.
Question 2
2a) Hint 1: How many people using the treadmill are using other machines too?
2a) Hint 2: What doesn't fit inside a circle might still fit inside the box.
2b) Hint 3: The question puts the same person in different categories, so you'll need to look elsewhere for your total.
Question 3
Hint 1: Remember the government encourages people to pay into their pension by giving tax relief on those payments.
Hint 2: Taxable income fills the bands like levelling up in a videogame. You have to do level 1 before you can start to fill level 2.
Question 4
4a) Hint 1: Start to finish with no gaps in between.
4b) Hint 2: Connections exist where one finishes and the next immediately starts.
4b) Hint 3: What time does each task have to start at, for your Forward Scan?
4b) Hint 4: What time does each task have to finish by, for your Backward Scan?
4c) Hint 5: Remember the 0th hour counts as an hour too.
Question 5
5a)i) Hint 1: Remember you must match the name of your variables and csv files EXACTLY, or it will make an error.
5a)i) Hint 2: Remember to check that you've seperated each label and variable with a comma ( , )
5a)i) Hint 3: Remember to check your data sheet for useful RStudio commands
5a)ii) Hint 4: Does it bulge vaguely in the middle, or off to one side?
5a)iii) Hint 5: Normal people are pretty standard.
5b) Hint 6: Why can't you tell me next week's winning lottery numbers?
Question 6
Hint 1: What order do things happen in? Interest, deposit, bonus...?
Hint 2: How much of the year is she accumulating interest for?
Question 7
7a) Hint 1: What is the probability of a delay?
7b) Hint 2: Each control measure knocks out one probability for a price.
7c) Hint 3: Cheap and cheerful?
Question 8
8a) Hint 1: Remember to use a placeholder for the value you're finding
8a) Hint 2: For the monthly effective rate, think about the compounding period for your decimal increase.
8a) Hint 3: Remember to anchor ($) the cells with constant values that you will refer to.
8a) Hint 4: Remember the cell you change with goal seek has to be a number value. It can't contain a formula.
8b) Hint 5: Why wouldn't you go to a car dealership right now and buy a new car?
8c) Hint 6: Did you remember every payment?
8c) Hint 7: Think of when the deposits are going in: is it in time for interest to be applied?
Question 9
9a) Hint 1: Is consistency from a larger measure of spread, or a smaller measure of spread?
9b)i) Hint 2: Are we comparing measures of central location, or proportions, how many samples?
9b)ii) Hint 3: Looking for variation, remember null = nothing.
9b)iii) Hint 4: Compare your p-value to 5%. Do we have evidence to reject the null hypothesis?
9c) Hint 5: Check your protein.
Question 10
10a) Hint 1: The key word here is constant, so between your start and finish, what will that look like?
10b)i) Hint 2: Think of its shape and direction.
10b)ii) Hint 3: "Y" are things dependant on others?
10c) Hint 4: Will the narrow points increase the depth of water faster, or the wider parts? Think of how that looks.
Question 11
11a) Hint 1: Which comes first: the payment or the interest?
11b) Hint 2: Why might it be in your interests to pay your debts quickly?
Question 12
12a) Hint 1: Is everyone who wants to be included, included? Is everything that should be included, included?
12b) Hint 2: Trying to COUNTIF each cell contains a specific colour.
12c) Hint 3: Which graphs are good for showing proportions?