(-0.0748, 0.15668) (-8.285, .2668) E (-7.034 8.0342) Soothing music is believed

Question

(-0.0748, 0.15668) (-8.285, .2668) E (-7.034 8.0342) Soothing music is believed to have a calming effect on our bodies. Does listening to soothing music have an efflect on pulse rate? The pulse rate of a random sample of 20 volunteers was taken before and after listening to soothing music constr ct a 95% toence interval forthe mean dfference in pulse rate before and afor istening to soothing music. E (-11.9, 12A 96) (-1.108, 0.491) Before 58 54 58 0(0.2161 60 76 80 82 67 66 02072, 0.1142) After 62 63 65 in 2016, 535 aduts aged 18 the universe or not (Group 1) Of the 535 surveyed, 326 said yes. When the same question was asked in 2006, 385 of the 0.4889) 500 individuals surveyed said yes (Group 2). Construct a 90% condence interval for the dnerence between tose in 2006 and 2016 who believe there is life on other planets K (0.83037, 1.5696) How often dok ou go out dancing? This question was asked by a professional survey group on behalt of the National Arts Survey A random sample of 76 single men showed that 26% went ot dreng ocasionally A other fanden sampled 72single women showed that 22% went out drang ocasonally 11 the proporton ofsirge men who go din ng

Explanation / Answer

QUESTION- SOOTHING MUSIC

95% confidence interval of this difference: From -0.27 to 1.27

This is the case of paired t test

20  

P value and statistical significance:
  The two-tailed P value equals 0.1883
  By conventional criteria, this difference is considered to be not statistically significant.

Confidence interval:
  The mean of Group One minus Group Two equals 0.50
95% confidence interval of this difference: From -0.27 to 1.27

Intermediate values used in calculations:
  t = 1.3648
  df = 19
  standard error of difference = 0.366

Confidence Interval for the Population Proportion. ...

Group   Group One     Group Two   Mean 71.00 70.50 SD 11.58 11.96 SEM 2.59 2.67 N 20    

20  

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