a) H0: Ha:
Z= 55-5010/sqrt(100)
Z= 5/10/10
Z= 5
Z critical=1.65
b) Z= 24-25/5/sqrt(100)
Z= -1/5/10
Z= -2
Z critical =-1.28
c) Z= 80.5-80/4/sqrt(100)
Z= 0.5/4/10
Z= 0.5*10/4
Z= 1.25
Z c= 1.96
Example 2.13 Perform the following hypothesis tests of the population mean. In each case, draw a...
3. Hypothesis tests about a population mean, population standard deviation unknowrn Aa Aa Airlines compute the weight of outbound flights using either standard average weights provided by the Federal Aviation Administration (FAA) or weights obtained from their own sample surveys. The FAA standard average weight for a passenger's carry-on items (personal items plus carry-on bags) is 16 pounds. Many airline companies have begun implementing fees for checked bags. Economic theory predicts that passengers will respond to the increase in the...
4. Hypothesis tests about a population mean, pop ulation standard deviation unknown Airlines compute the weight of outbound flights using either standard average weights provided by the Federal Aviation Administration (FAA) or weights obtained from their own sample surveys. The FAA standard average weight for a passenger's carry-on items (personal items plus carry-on bags) is 16 pounds. Many airline companies have begun implementing fees for checked bags. Economic theory predicts that passengers will respond to the increase in the price...
Determine the appropriate critical value(s) for each of the following tests concerning the population mean: а.НА: μ > 1 1, n = 13, σ = 10.5, α = 0.05 b. HA: μ#22, n-24, s-34.52, α 0.02 c. HA: μ关30, n= 38, σ-34.524 α= 0.20 d. HA: μ <46; data: 13.4, 16.2, 42.9, 22.3, 18.8; α-o.10 e.HA : x > 14, n-24, σ-10.3
2. Hypothesis tests about a population mean, population standard deviation known Aa Aa Lenders tighten or loosen their standards for issuing credit as economic conditions change. One of the criteria lenders use to evaluate the creditworthiness of a potential borrower is her credit risk score, usually a FICO score. FICO scores range from 300 to 850. A consumer with a high FICO score is perceived to be a low credit risk to the lender and is more likely to be...
3. Hypothesis tests about a population mean, population standard deviation known Aa Aa Lenders tighten or loosen their standards for issuing credit as economic conditions change. One of the criteria lenders use to evaluate the creditworthiness of a potential borrower is his credit risk score, usually a FICO score. FICO scores range from 300 to 850. A consumer with a high FICO score is perceived to be a low credit risk to the lender and is more likely to be...
3. Hypothesis tests about a population mean, population standard deviation unknown Aa Aa Airlines compute the weight of outbound flights using either standard average weights provided by the Federal Aviation Administration (FAA) or weights obtained from their own sample surveys. The FAA standard average weight for a passenger's carry-on items (personal items plus carry-on bags) is 16 pounds Many airline companies have begun implementing fees for checked bags. Economic theory predicts that passengers will respond to the increase in the...
Which of the following statements is not true if a test procedure about the population mean μ is performed when the population is normal with known standard deviation σ? A. The rejection region for level α test is z ≥ zα/2 end if the test is an lower-tailed test. B. The rejection region for level α test is z ≤ zα if the test is an upper-tailed test. C. The rejection region for level α test is z ≥ zα...
A sample mean, sample size, and population standard deviation are given. Use the one-mean z-test to perform the required hypothesis test at the given significance level. Use the P-value approach. x̄ = 259, n = 15, σ = 19, H 0: μ = 250, Ha : μ > 250, α = 0.01
Is there a relationship between confidence intervals and two-tailed hypothesis tests? Let c be the level of confidence used to construct a confidence interval from sample data. Let α be the level of significance for a two-tailed hypothesis test. The following statement applies to hypothesis tests of the mean. For a two-tailed hypothesis test with level of significance α and null hypothesis H0: μ = k, we reject H0 whenever k falls outside the c = 1 − α confidence...
7. For any hypothesis test: b) Write down the appropriate alternative hypotheses and give the formula for the each test statistic, if any, for the following null hypothesis testing population normally distributed population not normal population not normal population not normal population normal population normal population not normal () Ho: So n 80, s 29 (iii) Ho: μ-Ha n-15, σ-25 (iv) Ho: μ=Ha n= 15, s = 36 (v) Ho: μ>Ha n= 10, σ = 16 (vi) H0'μ Han-60, σ-81...