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WorksheetsSTAT 26 Quiz Test about a Population Mean
Total questions: 10
Worksheet time: 12mins
Count and Countess Dracula supervise students who are training to be hematologists. For one project their 8 students had to count certain cell types in blood samples. Their counts were 103, 75, 82, 107, 63, 102, 81, and 72. Does this support the hypothesis that the mean count is 100? Use 0.05 level of significance. Assume that the cell counts are normally distributed. Which of the following cases to use for this problem?
σ is known
σ is unknown; n≥30
σ is unknown; n<30
Count and Countess Dracula supervise students who are training to be hematologists. For one project their 8 students had to count certain cell types in blood samples. Their counts were 103, 75, 82, 107, 63, 102, 81, and 72. Does this support the hypothesis that the mean count is 100? Use 0.05 level of significance. Assume that the cell counts are normally distributed. Which of the following statements is the alternative hypothesis?
The mean count is not equal to 100.
The mean count is equal to 100.
The mean count is greater than 100.
Count and Countess Dracula supervise students who are training to be hematologists. For one project their 8 students had to count certain cell types in blood samples. Their counts were 103, 75, 82, 107, 63, 102, 81, and 72. Does this support the hypothesis that the mean count is 100? Use 0.05 level of significance. Assume that the cell counts are normally distributed. Which of the following statements is NOT true?
The null hypothesis will be rejected if t<-2.365 or t>2.365.
The null hypothesis will be rejected.
The conclusion will be, at 0.05 level of significance, the population mean is equal to 100.
The computed value is equal to -2.49.
Count and Countess Dracula supervise students who are training to be hematologists. For one project their 8 students had to count certain cell types in blood samples. Their counts were 103, 75, 82, 107, 63, 102, 81, and 72. Does this support the hypothesis that the mean count is 100? Use 0.01 level of significance. Assume that the cell counts are normally distributed. Which of the following statements is true?
The null hypothesis will be rejected if t<-2.365 or t>2.365.
The null hypothesis will be accepted at 0.01 level of significance.
The conclusion will be, at 0.01 level of significance, the population mean is not equal to 100.
The computed value is equal to 2.49.
Count and Countess Dracula supervise students who are training to be hematologists. For one project their 8 students had to count certain cell types in blood samples. Their counts were 103, 75, 82, 107, 63, 102, 81, and 72. Does this support the hypothesis that the mean count is 100? Assume that the cell counts are normally distributed.
Will the choice of level of significance affect the rejection of the null hypothesis?
YES
NO
A newspaper states that a family in Maramag, Bukidnon, on average, produces 5.2 pounds of organic garbage per week. A public health officer feels that the figure is incorrect. A random sample of 40 families is choses and the mean number of pounds of organic garbage produced by these 40 families is 4.4 pound with a standard deviation of 1.35 pounds. Test the health officer's test of the newspaper's claim, using a level of significance of 0.05. Which of the following cases to use for this problem?
σ is known
σ is unknown; n≥30
σ is unknown; n<30
A newspaper states that a family in Maramag, Bukidnon, on average, produces 5.2 pounds of organic garbage per week. A public health officer feels that the figure is incorrect. A random sample of 40 families is choses and the mean number of pounds of organic garbage produced by these 40 families is 4.4 pound with a standard deviation of 1.35 pounds. Test the health officer's test of the newspaper's claim, using a level of significance of 0.05. Which of the following statements is the null hypothesis?
A family in Maramag, Bukidnon, on average, produces 5.2 pounds of organic garbage per week.
A family in Maramag, Bukidnon, on average, does not produces 5.2 pounds of organic garbage per week.
A family in Maramag, Bukidnon, on average, produces less than 5.2 pounds of organic garbage per week.
A newspaper states that a family in Maramag, Bukidnon, on average, produces 5.2 pounds of organic garbage per week. A public health officer feels that the figure is incorrect. A random sample of 40 families is choses and the mean number of pounds of organic garbage produced by these 40 families is 4.4 pound with a standard deviation of 1.35 pounds. Test the health officer's test of the newspaper's claim. Which of the following statements is true?
At 0.01 level of significance, the population mean is not equal to 5.2 pounds.
At 0.05 level of significance, the population mean is equal to 5.2 pounds.
At 0.1 level of significance, the population mean is not equal to 5.2 pounds.
The newspaper's claim is true.
A newspaper states that a family in Maramag, Bukidnon, on average, produces 5.2 pounds of organic garbage per week. A public health officer feels that the figure is incorrect. A random sample of 40 families is choses and the mean number of pounds of organic garbage produced by these 40 families is 4.4 pound with a standard deviation of 1.35 pounds. Test the health officer's test of the newspaper's claim. On what choice from the common level of significance be the null hypothesis accepted?
0.01
0.05
0.1
A newspaper states that a family in Maramag, Bukidnon, on average, produces 5.2 pounds of organic garbage per week. A public health officer feels that the figure is incorrect. A random sample of 40 families is choses and the mean number of pounds of organic garbage produced by these 40 families is 4.4 pound with a standard deviation of 1.35 pounds. Test the health officer's test of the newspaper's claim. Use 0.05 level of significance. What are the critical regions?
Z>2.575 or Z<-2.575
Z>1.96 or Z<-1.96
Z>1.645 or Z<-1.645
Z>2.327 or Z<-2.327
Z>1.28 or Z<-1.28
