Skip to content

Course home

Sign up

2 Unit 2: Applied Mathematics A

EasyMediumHard
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157
Question 154

The discrete random variable X X\,X has the distribution X∼B(20,0.41)X \sim B(20, 0.41)X∼B(20,0.41).

a.

Find P(3<X≤7)P(3 < X \le 7)P(3<X≤7).

[2]
b.

A restaurant's records show that 30% of its customers order a starter. On one day a random sample of 50 customers is taken, and 9 of them order a starter. Stating your hypotheses clearly, test at the 5% significance level whether the proportion of customers ordering a starter has decreased.

[4]
Markscheme

2 Unit 2: Applied Mathematics A Questions

  1. A Level
  2. /Maths
  3. /2 Unit 2: Applied Mathematics A

Question bank