Mathematics, 10.09.2021 16:40 fsyeda550
Parplan Opinion Polls Ltd conducted a nationwide survey into the attitudes of teenage girls. One of the questions asked was 'What is the ideal age for a girl to have her first baby?' In reply, the sample of 165 girls from the Northern zone gave a mean of 23.4 years and a standard deviation of 1.6 years. Subsequently, the overall sample of 384 girls (Northern plus Southern zones) gave a mean of 24.8 years and a standard deviation of 2.2 years. Assuming that no girl was consulted twice, calculate the mean and standard deviation for the 219 girls from the Southern zone.
Answers: 1
Mathematics, 21.06.2019 12:30
And employees salary increase by $4500 which represents a 15% raise what is the employees new salary
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Mathematics, 21.06.2019 19:30
The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?
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Mathematics, 21.06.2019 19:40
Neoli is a nurse who works each day from 8: 00 am to 4: 00 pm at the blood collection centre. she takes 45 minutes for her lunch break. on average, it takes neoli 15 minutes to collect each sample and record the patient's details. on average, how many patients can neoli see each day?
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Parplan Opinion Polls Ltd conducted a nationwide survey into the attitudes of teenage girls. One of...
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