Mathematics, 31.03.2020 03:20 lily24113
A survey was conducted of the age (in years) of 30 randomly selected customers. The mean was 29.61 years and the standard deviation was 10.19 years. How large would the sample size have to be to cut the margin of error of a confidence interval based on this data in half?
Answers: 3
Mathematics, 21.06.2019 22:30, carltonwashington23
Julie was able to walk 16 km through the zoo in 6 hours. how long will it take her to walk 24 km through the zoo?
Answers: 2
Mathematics, 21.06.2019 23:30, blueval3tine
Sally deposited money into a savings account paying 4% simple interest per year. the first year, she earn $75 in interest. how much interest will she earn during the following year?
Answers: 1
Mathematics, 22.06.2019 01:40, tinamarie04ts
Agroup of student volunteers participates in a study designed to assess several behavioral interventions for improving output in a repetitive task. prior to the beginning of the study, all volunteers unknowingly observed, and their output is measured. at the beginning of the study, prior to any intervention, the volunteers perform the same task under the observation of a study administrator, and their overall output increases. which of the following terms describes this phenomenon? a. simpson's paradox b. hawthorne effect are d. novelty effect d. pygmalion effect e. observer-expectancy effect
Answers: 1
A survey was conducted of the age (in years) of 30 randomly selected customers. The mean was 29.61 y...
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