Mathematics, 06.05.2021 01:00, sherlock19
The table shows all students in each year group of a school.
The headteacher wants to do a survey.
She decides to take a stratified sample of 80 students to interview.
Year GroupNo. of StudentsSample
Year 7120a
Year 8160b
Year 9220c
Year 10170d
Year 11130e
Work out the missing values a to e
.
Answers: 1
Mathematics, 22.06.2019 02:00, divagothboi
Thirteen bowlers were asked what their score was on their last game. the scores are shown below 190,150,154,194,181,190,170,151,170 ,178,161,180 find the range of the bowlers score a.56 b.44 c.34 d.23
Answers: 1
Mathematics, 22.06.2019 04:30, glocurlsprinces
Consider the linear model for a two-stage nested design with b nested in a as given below. yijk=\small \mu + \small \taui + \small \betaj(i) + \small \varepsilon(ij)k , for i=1,; j= ; k=1, assumption: \small \varepsilon(ij)k ~ iid n (0, \small \sigma2) ; \small \taui ~ iid n(0, \small \sigmat2 ); \tiny \sum_{j=1}^{b} \small \betaj(i) =0; \small \varepsilon(ij)k and \small \taui are independent. using only the given information, derive the least square estimator of \small \betaj(i) using the appropriate constraints (sum to zero constraints) and derive e(msb(a) ).
Answers: 2
Mathematics, 22.06.2019 04:50, ramirezzairap2u4lh
The two cones below are similar. what is the height of the smaller cone?
Answers: 1
The table shows all students in each year group of a school.
The headteacher wants to do a survey....
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