Hypothesis: Standard Deviation and Critical Value
1.If the test value in the figure below is 2.57 when the critical value is 1.96, what decision about the hypothesis should be made?
A)reject the null hypothesis 
B)accept the null hypothesis 
C)reject the alternative hypothesis 
D)not enough information 
2.The standard error of difference is .
A)True
B)False
3.In the figure below, if the test value is 1.43, the null hypothesis should not be rejected. 
A)True
B)False
4.When hypothesizing a difference of 0, if the confidence interval does not contain 0, the null hypothesis is rejected.
A)True
B)False
5.For normally distributed populations, if the samples are …show more content…
A)3.1 
B)9.61 
C)49.5 
D)7.03 
25.Samples are independent when they are not related.
A)True
B)False
26.A pooled estimate of the variance is a weighted average of the variance using the two sample variances and the __________ of each variance as the weights.
Use the following to answer questions 2729:
Mauricio Cruz, a wine merchant for Cruz's Spirits Emporium, wants to determine if the average price of imported wine is less than the average price of domestic wine. The data obtained is shown in the table below.
Imported WineDomestic Wine 7.039.78 2.313.62 1516 
27.What is the null hypothesis? Use .
A) 
B) 
C) 
D) 
28.What is the critical value? Use .
A)–1.761 
B)–2.045 
C)–1.697 
D)–1.703 
29.What is the test value? Use .
A)–6.97 
B)–2.50 
C)–4.53 
D)–2.54 
30.Determine the value of as shown in the figure below, if the degrees of freedom were seven and nine.
A)0.01 
B)0.025 
C)0.05 
D)0.1 
31.If the variances are not known and one or both sample sizes are less than 30, the test must be used.
A)True
B)False
32.The formula for the  test for comparing two means (independent samples, variances equal) is: .
A)True
B)False
33.A local charity thinks that people in River Heights

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