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Which of the following statements regarding ionic compounds is incorrect?

Provide an appropriate response. A private opinion poll is conducted for a politician to determine what proportion of the population favors adding more national parks. What size sample should be obtained in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 2%?

A simple random sample of size n

Provide an appropriate response. Determine the critical value for a right-tailed test of a population mean at the α = 0.005 level of significance with 28 degrees of freedom.

Provide an appropriate response. A pollster wishes to estimate the number of left-handed scientists. What size sample should be obtained in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 3%? A previous study indicates that the proportion of left-handed scientists is 11%.

The null and alternative hypotheses are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed and the parameter that is being tested. H 0 : μ = 9.0 H 1 : μ ≠ 9.0

Provide an appropriate response. If we do not reject the null hypothesis when the null hypothesis is in error, then we have made a

Find the t-value. Find the critical t-value that corresponds to 99% confidence and n = 10.

Provide an appropriate response. A local tennis pro-shop strings tennis rackets at the tension (pounds per square inch) requested by the customer. Recently a customer made a claim that the pro-shop consistently strings rackets at lower tensions, on average, than requested. To support this claim, the customer asked the pro shop to string 12 new rackets at 55 psi. Suppose the two-tailed P-value for the test described above (obtained from a computer printout) is 0.09. Give the proper conclusion for the test. Use α = 0.10.

  A 21-year-old man with nausea, vomiting, and jaundice has the following laboratory findings:   Total serum bilirubin 8.5 mg/dL (normal 0-1.0 mg/dL) Direct serum bilirubin 6.1 mg/dL (normal 0-0.5 mg/dL) Urine urobilinogen Increased Urine bilirubin Positive AST 200 U/L (normal 0-50 m/L) ALP 160 U/L (normal 0-150 m/L)   What disease state are these findings consistent with?