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The owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership. The dealership has historically had 800 customers per day. The owner takes a sample of 100 days and finds the average number of customers visiting the dealership per day was 750. Assume that the population standard deviation is 350. At the 5% significance level, the decision is to ___________.
reject Ho; we can conclude that the mean number of customers visiting the dealership is significantly less than 800
reject Ho; we cannot conclude that the mean number of customers visiting the dealership is significantly less than 800
do not reject Ho; we can conclude that the mean number of customers visiting the dealership is significantly less than 800
do not reject Ho; we cannot conclude that the mean number of customers visiting the dealership is significantly less than 800
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The owner of a large car dealership believes that the financial crisis decreased the number of...
The owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership. The dealership has historically had 800 customers per day. The owner takes a sample of 100 days and finds the average number of customers visiting the dealership per day was 750. Assume that the population standard deviation is 350. The population parameter to be tested is Multiple Choice the average number of 750 customers per day the proportion of customers...
The owner of a large car dealership believes that the financial crisis decreased the number of...
The owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership. The dealership has historically had 800 customers per day. The owner takes a sample of 100 days and finds the average number of customers visiting the dealership per day was 750. Assume that the population standard deviation is 350. The value of the test statistic is Multiple Choice z = 1.429 o t99 = 1.429 t99=1429 t99 = -1.429 z=-1.429
In a one-tailed test, the rejection region is located under one tail (left or right) of...
In a one-tailed test, the rejection region is located under one tail (left or right) of the corresponding probability distribution, while in a two-tailed test this region is located under both tails. True False Question 8 1 pts The owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership. The dealership has historically had 800 customers per day. The owner takes a sample of 100 days and finds the average number...
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Consider the following hypotheses H0 : μ-420 HA: 420 The population is normally distributed with a population standard deviation of 72. (You may find it useful to reference the appropriate table: z table or t table) a-1. Calculate the value of the test statistic with x = 430 and n= 90' (Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Test statistic a-2. what is the conclusion at the 1% significance level? OReject...
The owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership. The dealership has historically had 800 customers per day. The owner takes a sample of 100 days and finds the average number of customers visiting the dealership per day was 750. Assume that the population standard deviation is 350. The population parameter to be tested is Multiple Choice the average number of 750 customers per day the proportion of customers...
The owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership. The dealership has historically had 800 customers per day. The owner takes a sample of 100 days and finds the average number of customers visiting the dealership per day was 750. Assume that the population standard deviation is 350. The value of the test statistic is Multiple Choice z = 1.429 o t99 = 1.429 t99=1429 t99 = -1.429 z=-1.429
In a one-tailed test, the rejection region is located under one tail (left or right) of the corresponding probability distribution, while in a two-tailed test this region is located under both tails. True False Question 8 1 pts The owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership. The dealership has historically had 800 customers per day. The owner takes a sample of 100 days and finds the average number...
A university is interested in promoting graduates of its honors program by establishing that the mean GPA of these graduates exceeds 4.3. A sample of 44 honors students is taken and is found to have a mean GPA equal to 4.4. The population standard deviation is assumed to equal 0.40. The parameter to be tested is O the mean GPA of 4.4 for the 44 selected honors students the mean GPA of all university students the proportion of honors students...
You may need to use the appropriate appendix table or technology to answer this question The Internal Revenue Service (IRS) provides a toll-free help line for taxpayers to call in and get answers to questions as they prepare their tax returns. In recent years, the IRS has been inundated with taxpayer calls and has redesigned its phone service as well as posted answers to frequently asked questions on its website.t According to a report by a taxpayer advocate, callers using...
Consider the following hypotheses: H0 M = 130 HA A 130 The population is normally distributed with a population standard deviation of 56. (You may find it useful to reference the appropriate table: z table or table) a-1. Calculate the value of the test statistic with 7 = 149 and n= 45. (Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Test statistic a-2. What is the conclusion at the 5% significance level?...
Consider the following hypotheses: H0: μ-360 The population is normally distributed with a population standard deviation of 73. (You may find it useful to reference the appropriate table: z table or t table) a-1. Calculate the value of the test statistic with x = 389 and n = 80, (Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Test statistic a-2 what is the conclusion at the 10% significance level? Do not reject...
n order to conduct a hypothesis test for the population proportion, you sample 480 observations that result in 264 successes. (You may find it useful to reference the appropriate table: z table or t table) Ho: pz 0.60 HA: p0.60 a-1. Calculate the value of the test statistic. (Negative value should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Test statistic 2.24 a-2. Find the p-value....
The number of miles traveled by birds is known to be normally distributed. A random sample of 43 birds results in a mean distance of 2.64 miles with a standard deviation of 0.15 miles. You've been asked to construct a 95% confidence interval for the mean number of miles traveled. Based on this you would use the table. none of the above. Ttable Ftable Z table Question 16 1 pts Consider the following competing hypotheses: HON= 0, HAU# 0. The...
Consider the following hypotheses H0 : μ-420 HA: 420 The population is normally distributed with a population standard deviation of 72. (You may find it useful to reference the appropriate table: z table or t table) a-1. Calculate the value of the test statistic with x = 430 and n= 90' (Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Test statistic a-2. what is the conclusion at the 1% significance level? OReject...
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