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Leviafan [203]
3 years ago
9

PLZ HELP

Mathematics
1 answer:
Masja [62]3 years ago
3 0

Answer:

B. Survey 1,000 people aged below 25 who read newspapers

Step-by-step explanation:

It's the youth in the community so it's obviously people below 25 and we need more responses to get a more unbiased opinion.

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Eight trials are simulated. The results are shown in the table.
bezimeni [28]

Answer:

2.897

Step-by-step explanation:

Let us find the mean and variance for the sample first.

105 104 110 112

114 106 108 109

Mean = sum/8 = 108.5

Variance = 12

Std dev = sq rt of variance = 3.464

Std error = std dev/ sq rt n

since n =8, we get std error = 1.225

Since sample size is small, df =8-1 =7

For 95% confidence intervals, t critical value for two tailed=2.365

Margin of error = std error x t critical = 1.225(2.365)

=2.897


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