and n=65,cons 4 = م 76 = 7 If Confidence interval estimate of the كثر ہے
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Given that
Sample size n=65
Sample mean=76
Population standard deviation =14
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- Please show me the question of 3 and 410.1) The output voltage for a certain electric circuit is specified to be 130. An electrical engineer claims that in his experience these circuits produce less than 130 volts. He decides to take a random sample of independent readings to support his claim. a) Formulate null and alternative hypotheses to be tested. b) Describe type I and type II errors that the engineer could possibly make.A biologist believes that there has been increase in the mean total suspended solids (TSS, mg/L) among Philippine rivers since its last study, where a mean 80 mg/L of TSS was observed. A random sample of 25 rivers was observed and the mean TSS was found to be 100 mg/L. Suppose it is of interest to test the biologist claim, the appropriate pair of null and alternative hypotheses is O Ho: µ-80, Ha: μ>80 O Ho: μ-100, Ha: µ>100 O Ho: X-bar = 80, Ha: X-bar > 80 O Ho: X-bar = 100, Ha: X-bar > 100
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