A telephone company claims that the service calls which they receive are equally distributed among the five working days of the week. A survey of 111 randomly selected service calls was conducted. Is there enough evidence to refute the telephone company's claim that the number of service calls does not change from day-to-day? Days of the Week          Number of CallsMon                                        15Tue                                          21Wed                                         26Thu                                          31Fri                                            18 A) Find the critical value of the test at the 0.025 level of significance. Round your answer to three decimal places. B)Make the decision to reject or fail to reject the null hypothesis at the 0.025 level of significance. C) State the conclusion of the hypothesis test at the 0.025 level of significance.

Question

A telephone company claims that the service calls which they receive are equally distributed among the five working days of the week. A survey of 111 randomly selected service calls was conducted. Is there enough evidence to refute the telephone company's claim that the number of service calls does not change from day-to-day?

Days of the Week          Number of Calls
Mon                                        15
Tue                                          21
Wed                                         26
Thu                                          31
Fri                                            18

A) Find the critical value of the test at the 0.025 level of significance. Round your answer to three decimal places.

B)Make the decision to reject or fail to reject the null hypothesis at the 0.025 level of significance.

C) State the conclusion of the hypothesis test at the 0.025 level of significance.

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Math
Statistics

Hypothesis Testing

Related Statistics Q&A

Find answers to questions asked by students like you.

Q: i attached a picture! (the blue markings are from another question that i already got) Thanks!

A: Click to see the answer

Q: In a survey of 700 community college students , 481 indicated that they have read a book for persona...

A: The 90% confidence interval for the proportion of community college students who have read a book fo...

Q: Jimmy is the education consultant of a tutorial school, which arranges preparatory classes for IELT ...

A: (a) The mean of the performance is, Thus, the mean performance is 7.11. The median is the average o...

Q: Two regular six-sided dice are tossed. Compute the probability that the sum of the pips on the upwar...

A: Click to see the answer

Q: It is estimated that​ 20% of luxury cars manufactured in 2012 were silver. A car dealership typicall...

A: Click to see the answer

Q: Thumbs-up is a popular and new soft drink company in India.  The company wants to test the market fo...

A:   The known values are The sample proportion is, Null and alternative hypothesis: Significance le...

Q: In a study of the accuracy of fast food​ drive-through orders, Restaurant A had 207 accurate orders ...

A: a)  We have calculated it using the TI84 Here,n=275 and x=67 Now, TI84 Command is: CLICK on STATS--&...

Q: The contents of 3434 cans of Coke have a mean of x⎯⎯⎯=12.15x¯=12.15 and a standard deviation of s=0....

A: It is given that:

Q: A study showed that 31​% of all firms in Country A are owned by women. You are phoning local​ busine...

A: Obtain the probability that all the three are owned by women. The probability that all the three are...

Q: It has been estimated that only about 30% of California residents have adequate earthquake supplies....

A: Click to see the answer

Q: The accuracy of a census report on a city in southern California was questioned by some government o...

A: Click to see the answer

Q: The pulse rates of 147 randomly selected adult males vary from a low of 35 bpm to a high of 103 bpm....

A: Click to see the answer

Q: The birth weights for two groups of babies were compared in a study. In one group the mothers took a...

A: Obtain the 90% confidence interval for the true difference between the mean birth weights for "zinc"...

Q: 30% of all college students major in STEM (Science, Technology, Engineering, and Math). If 45 colleg...

A: Solution: a. Let X be the number of students major in STEM and n be the sample size.. From the given...

Q: A study was conducted on students from a particular high school over the last 8 years. The following...

A: The provided information are: Consider, X be the random variable that represents the scores on the S...

Q: You wish to test the following claim (HaHa) at a significance level of α=0.005α=0.005. For the conte...

A: Click to see the answer

Q: A bullying prevention program is underway in the phoenix school districts.  The researchers ran mult...

A: Given that, A bullying prevention program is underway in the phoenix school districts.  The research...

Q: QUESTION 35 A professor of women's studies is interested in determining if stress affects the menstr...

A: a. Obtain the value of F-Max critical: There are two groups, so that k = 2. Here, 17 women are rando...

Q: This year’s water pollution readings at State Park Beach seem to be lower than last year. A sample o...

A: State the hypotheses. That is, there is no evidence that to conclude that the mean of this year’s p...

Q: I have a statistics the question which on the attached image.

A: A) The mean of the data can be obtained as:

Q: Use the table to answer the question. Note: Round z-scores to the nearest hundredth and then find th...

A: Click to see the answer

Q: Assume that it is equally likely for a child to be born a boy or a girl, and that the Lin family is ...

A: Click to see the answer

Q: Number 104

A: 104 That is, there is no significant evidence to conclude that environment caused a difference in m...

Q: A new vaccination is being used in a laboratory experiment to investigate whether it is effective. T...

A: Click to see the answer

Q: A card is selected at random from a standard deck of playing cards.Compute the probability that the ...

A: Introduction: The probability of an event in an experiment is the number outcomes in the experiment ...

Q: A study will be conducted to investigate whether there is a difference in the mean weights between t...

A: A two-sample t-test can be defined as a statistical procedure which can be used to determine whether...

Q: Observations of any variable recorded over a sequential period of time are considered time-series. F...

A: Time-series data: Data of any variable that is recorded over a period in a sequential order are call...

Q: Statistics students in Oxnard College sampled 9 textbooks in the Condor bookstore and recorded the n...

A: Click to see the answer

Q: An office supply company services copiers and tracks how many machines are serviced and the length o...

A: Click to see the answer

Q: The probability of an event is given. Find the odds in favor of the event. 0.5

A: The probability of an event is given as 0.5, from this the probability of non-occurrence of the even...

Q: A hospital is trying to cut down on emergency room wait times. It is interested in the amount of tim...

A: Introduction: The sample mean is an unbiased estimator of the population mean. Hence, the sample mea...

Q: Which kind of descriptive statistics can be included to summarize the quantitative data? if the dist...

A: Click to see the answer

Q: The ability to release antibiotics locally in traumatic bone injuries such as those experienced by m...

A: "Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for y...

Q: Here are summary statistics for randomly selected weights of newborn​ girls: n=152​, x =29.4 hg, s=7...

A:  

Q: Suppose that the value of a stock varies each day from $16 to $26 with a uniform distribution.   F...

A: It is given that the value of a stock follows uniform distribution with lower limit as $16 and upper...

Q: An educational researcher wishes to know if there is a difference in academic performance for colleg...

A: G. Hypotheses: H0­ : The freshman housing location and academic performance are related. The alterna...

Q: 108 Americans were surveyed to determine the number of hours they spend watching television each mon...

A: Click to see the answer

Q: Using traditional methods it takes 91 hours to receive an advanced flying license. A new training te...

A: Click to see the answer

Q: A snack-size bag of M&Ms candies contains 12 red candies, 12 blue, 7 green, 11 brown, 5 orange, ...

A:   A snack-size bag of M&Ms candies contains 12 red candies, 12 blue, 7 green, 11 brown, 5 orange...

Q: If two dice are rolled, compute the probability of rolling doubles (both dice show the same number o...

A: Two dices are rolled Sample space = (1, 1) (1, 2) (1, 3) (1, 4) (1, 5) (1, 6).                      ...

Q: Houseflies have short lifespans. Males of a certain species have lifespans that are strongly skewed ...

A: Calculate the sample mean lifespan. The mean life span is obtained below: Central limit theorem: If ...

Q: In the Chapter Problem, we noted that the safe load for a water taxi was found to be 3500 pounds. We...

A: Solution: Let X be the weight of the men. From the given information, X follows normal distribution ...

Q: It might be predicted that consumer buying behavior would vary with the location of products in a st...

A: Excel is used to analyse the data and made the decision about the null hypothesis. The steps are as:...

Q: A survey asked 850 respondents about their highest levels of completed education. The results are gi...

A: Given, Total number of respondents= 850, Respondents having bachelor degree= 187 P(Respondent has ba...

Q: A new vaccination is being used in a laboratory experiment to investigate whether it is effective. T...

A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we ar...

Q: Find the value of Z such that 95% of the area under the standard normal probability distribution cur...

A: Solution: From the given information, By using the excel

Q: Groups of men from three different areas of the country are to be tested for mean weight. The entrie...

A: One-Way ANOVA procedure: Step-by-step procedure to compute one-way ANOVA in EXCEL is as follows. Go...

Q: 1. Conduct a hypothesis test to see if there is a significant difference in the proportion of A and ...

A: Solution: 1. Let p1 be the proportion of A residents who placed an Uber eats order in the past three...

Q: Chapter 08, Section 8.3, Problem 041

A: Click to see the answer

Q: Use the data given in the table below to compute the probability that a randomly chosen voter from t...

A: Probability: The formula for probability of an event E is as follows: