2.5 O: Statistical hypothesis testing

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 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 99 100 101 102 103 104 105

Question 1

30%

The discrete random variable $\sim B(20, 0.41)$

Find $\leq 7)$

[2]

Previous research by a restaurant found that 30% of customers will order a starter.
On one day a random sample of 40 customers is taken and 7 order a starter.

Test at the 5% significance level whether the proportion of customers ordering a starter has decreased.

[5]

State the conclusion you would have reached if you tested at the 10% significance level.

[1]

The discrete random variable $\sim B(20, 0.41)$

Previous research by a restaurant found that 30% of customers will order a starter.
On one day a random sample of 40 customers is taken and 7 order a starter.

Test at the 5% significance level whether the proportion of customers ordering a starter has decreased.

State the conclusion you would have reached if you tested at the 10% significance level.

[1]

2.5 O: Statistical hypothesis testing

Question 1

Markscheme

2.5 O: Statistical hypothesis testing

Question 1

Markscheme

2.5 O: Statistical hypothesis testing

Question 1

2.5 O: Statistical hypothesis testing Questions

2.5 O: Statistical hypothesis testing

Question 1

2.5 O: Statistical hypothesis testing Questions