p-value practice
MULTIPLE CHOICE. 统计p-value代写
Choose the one alternative that best completes the statement or answers the question.
The significance level and P–value of a hypothesis test are given. Decide whether the null hypothesis should be rejected.
1) α = 0.10, P-value = 0.08 1)__________
A) Reject the null hypothesis.
B) Do not reject the null hypothesis.
2) α = 0.10, P-value = 0.12 2)__________
A) Reject the null hypothesis.
B) Do not reject the null hypothesis.
The value obtained for the test statistic, z, in a one–mean z–test is given. Also given is whether the test is two tailed, left tailed, or right tailed. Determine the P–value. 统计p-value代写
3) A right-tailed test: z = 2.38 3)__________
A) 0.0174
B) 0.9826
C) 0.9913
D) 0.0087
4) A two-tailed test: z = 1.31 4)__________
A) 0.0951
B) 0.9049
C) 0.1902
D) 0.8098
5) A left-tailed test: z = -2.65 5)__________
A) 0.9920
B) 0.9960
C) 0.0080
D) 0.0040
SHORT ANSWER. 统计p-value代写
Write the word or phrase that best completes each statement or answers the question.
Perform a one–sample z–test for a population mean using the P–value approach. Be sure to state the hypotheses and the significance level, to compute the value of the test statistic, to obtain the P–value, and to state your conclusion. Also, assess the strength of the evidence against the null hypothesis.
6) In one city, the average amount of time that tenth-graders spend watching television each week is 21.6 hours. The principal of Birchwood High School believes that at his school, tenth-graders watch less television. For a sample of 28 tenth-graders from Birchwood High School, the mean amount of time spent watching television per week was 19.4 hours.
Do the data provide sufficient evidence to conclude that for tenth-graders at Birchwood High School, the mean amount of time spent watching television per week is less than the city average of 21.6 hours? Perform the appropriate hypothesis test using a significance level of 5%. Assume that Η= 7.2 hours. 6)__________
MULTIPLE CHOICE. 统计p-value代写
Choose the one alternative that best completes the statement or answers the question.
Provide an appropriate response.
7) A hypothesis test for a population mean is to be performed at the 1% level of significance. True or false: If the null hypothesis is true, the probability that the test statistic will fall in the rejection region is 0.01. 7)__________
A) True
B) False
Use a table of t–values to estimate the P–value for the specified one–mean t–test.
8) Right-tailed test, n = 23, t = 1.571 8)__________
A) 0.01 < P <025
B) P >10
C) 0.05 < P <10
D) 0.025 < P <05
9) Left-tailed test, n = 4, t = -1.527 9)__________
A) P <10
B) 0.05 < P <10
C) 0.025 < P <05
D) P >10
更多代写：cs北美高中代修网课案例 台灣代考 英国统计学网课代写 论文北美格式代写 澳洲音乐学网课代修 统计学考试练习题代做
