Question

A researcher is testing a hypothesis of a single mean. The critical z value for =...

A researcher is testing a hypothesis of a single mean. The critical z value for = .05 and a one-tailed test is 1.645. The observed z value from sample data is 1.13. The decision made by the researcher based on this information is to ______ the null hypothesis.

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

The decision made by the researcher based on this information is to accept (fail to reject) the null hypothesis.

[explanation:-

test statistic :-

the critical value of z at alpha=0.05 is:-

the positive critical value indicates that it is a right tailed test .

decision:-

so, we fail to reject the null hypothesis.]

*** if you have any doubt regarding the problem please write it in the comment box.if you are satisfied please give me a LIKE if possible...

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A researcher conducted a single-sample null hypothesis test with the z-statistic. The researcher reports that z...
A researcher conducted a single-sample null hypothesis test with the z-statistic. The researcher reports that z = +1.30. This z-statistic was calculated from sample data that was drawn from a normal population. The researcher sets α = .05 and uses a two-tailed test. On the basis of his data, the researcher decides to fail to reject the null hypothesis. Did the researcher make the correct decision or did he make an error? If he made an error, what type of...
Question #3 A researcher is conducting and experiment to evaluate a treatment that is expected to...
Question #3 A researcher is conducting and experiment to evaluate a treatment that is expected to increase the scores for individuals in a population. If the researcher uses a one-tailed test with ( a = .01), then which of the following correctly identifies the critical region? A. z > 2.33 B. z > 2.58 C. z < 2.33 D. z < 2.58 Question #4 A researcher evaluates a treatment effect using a two tailed hypothesis test with ( a =...
The negative critical value for a two-tailed hypothesis testing on the mean µ at the 5%...
The negative critical value for a two-tailed hypothesis testing on the mean µ at the 5% level of significance for a sample of size n = 11 (Assume σ not known) is: t0.025,10= -2.228;   B. Z0.025 = -1.96; B. Z0.05 =- 1.645; t0.05,10 = - 2.10
12. Calculate the critical z-value(s) for each of the given hypothesis test scenarios below. If mulitple...
12. Calculate the critical z-value(s) for each of the given hypothesis test scenarios below. If mulitple critical values exist for a single scenario, enter the solutions using a comma-separated list. Round z-values to two decimal places. Find the critical z-value(s) for a left-tailed test of hypothesis for a mean, assuming the population standard deviation is known, with a sample size of 98 and let α=0.005. z= Find the critical z-value(s) for a right-tailed test of hypothesis for a mean, assuming...
1. After summarizing data collected to test a null hypothesis (e.g., observing z as a test...
1. After summarizing data collected to test a null hypothesis (e.g., observing z as a test statistic), a researcher fails to reject the null hypothesis (p > .05). The researcher then concludes that there is no treatment effect (treatment does not affect variation on the DV). Is this a correct conclusion? a. yes, it is correct b. no, it is incorrect; a decision to fail to reject the null hypothesis results in ignorance about a treatment effect 35. Consider z...
A researcher wants to test if the mean annual salary of all lawyers in a city...
A researcher wants to test if the mean annual salary of all lawyers in a city is different from $110,000. A random sample of 51 lawyers selected from the city reveals a mean annual salary of $105000. Assume that σ=$20000, and that the test is to be made at the 2% significance level. What are the critical values of z? -1.645 and 1.645 -1.28 and 1.28 -2.33 and 2.33 -2.05 and 2.05 What is the value of the test statistic,...
Hypothesis Tests with Z-statistics The mean for the SATs for all high school students was 500,...
Hypothesis Tests with Z-statistics The mean for the SATs for all high school students was 500, with a standard deviation of 100. 75 students from Rio Hondo were tested and they produced a mean of 510. a. Who are the groups being compared/tested? b. What are the null and research hypotheses? c. what are the numbers needed for the z statistic? d. What is the z statistic? e. For a two tailed test at .05 significance, the critical area is...
1. Calculate the critical degrees of freedom and identify the critical t value for a single-sample...
1. Calculate the critical degrees of freedom and identify the critical t value for a single-sample t test in each of the following situations, using p=.05 for all scenarios. Then, state whether the null hypothesis would fail to be rejected or rejected: a. Two-tailed test, N = 14, t = 2.05, (df= Answer:, critical t = Answer:, Reject or Fail to Reject Ho: Answer: b. One-tailed test, N = 14, t = 2.05, (df= Answer:, critical t = Answer:, Reject...
Suppose you are testing the null hypothesis that a population mean is less than or equal...
Suppose you are testing the null hypothesis that a population mean is less than or equal to 80, against the alternative hypothesis that the population mean is greater than 80. The sample size is 49 and alpha =.05. If the sample mean is 84 and the population standard deviation is 14, the observed z value is _______.
1. if You are testing a hypothesis about a population proportion and a sample size is...
1. if You are testing a hypothesis about a population proportion and a sample size is over 100 what is the proper test statistic to use? A) z statstic B) chi-square c) t statistic d) not enough data 2. If you are using the critical value approach to do a single tailed hypothesis test on the population mean, what impact will a smaller standard error have on the critical value of your test statistic? A) critical value will increae b)...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT