# P value 7 the volume of detergent in a standard

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7.The volume of detergent in a standard dispenser bottle is normal with a known standard deviation of 0.10 litres. 25 bottles were randomly selected from the production line and found the sample mean to be 1.50. Construct the 95% confidence interval for the mean of the population.
8.When the sample size is increased, what will happen to the 95% confidence interval?
9.With a large sample size, a one-tail hypothesis test was conducted and the observed z value of 2.33 was obtained. What is the p-value for this z?
10.Which of the following is/are factors in choosing an appropriate sample size?I.The desired level of confidence, expressed in terms of z.II.The maximum allowable error, E, that the researcher will tolerate.III.The variability in the population under study, measured by σ.I, II and III
11._______ is a statement or claim that a population parameter has changed.
12.Identify the factors that determine the sample size when the objective is to estimate a proportion?I.Desired level of confidence.II.Maximum allowable error.III.Sample proportion
13.When executing an appropriate hypothesis testing, the burden of proof is NOT claimed as
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